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2019-09-25btrfs: relocation: fix use-after-free on dead relocation rootsQu Wenruo1-1/+8
[BUG] One user reported a reproducible KASAN report about use-after-free: BTRFS info (device sdi1): balance: start -dvrange=1256811659264..1256811659265 BTRFS info (device sdi1): relocating block group 1256811659264 flags data|raid0 ================================================================== BUG: KASAN: use-after-free in btrfs_init_reloc_root+0x2cd/0x340 [btrfs] Write of size 8 at addr ffff88856f671710 by task kworker/u24:10/261579 CPU: 2 PID: 261579 Comm: kworker/u24:10 Tainted: P OE 5.2.11-arch1-1-kasan #4 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X99 Extreme4, BIOS P3.80 04/06/2018 Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs] Call Trace: dump_stack+0x7b/0xba print_address_description+0x6c/0x22e ? btrfs_init_reloc_root+0x2cd/0x340 [btrfs] __kasan_report.cold+0x1b/0x3b ? btrfs_init_reloc_root+0x2cd/0x340 [btrfs] kasan_report+0x12/0x17 __asan_report_store8_noabort+0x17/0x20 btrfs_init_reloc_root+0x2cd/0x340 [btrfs] record_root_in_trans+0x2a0/0x370 [btrfs] btrfs_record_root_in_trans+0xf4/0x140 [btrfs] start_transaction+0x1ab/0xe90 [btrfs] btrfs_join_transaction+0x1d/0x20 [btrfs] btrfs_finish_ordered_io+0x7bf/0x18a0 [btrfs] ? lock_repin_lock+0x400/0x400 ? __kmem_cache_shutdown.cold+0x140/0x1ad ? btrfs_unlink_subvol+0x9b0/0x9b0 [btrfs] finish_ordered_fn+0x15/0x20 [btrfs] normal_work_helper+0x1bd/0xca0 [btrfs] ? process_one_work+0x819/0x1720 ? kasan_check_read+0x11/0x20 btrfs_endio_write_helper+0x12/0x20 [btrfs] process_one_work+0x8c9/0x1720 ? pwq_dec_nr_in_flight+0x2f0/0x2f0 ? worker_thread+0x1d9/0x1030 worker_thread+0x98/0x1030 kthread+0x2bb/0x3b0 ? process_one_work+0x1720/0x1720 ? kthread_park+0x120/0x120 ret_from_fork+0x35/0x40 Allocated by task 369692: __kasan_kmalloc.part.0+0x44/0xc0 __kasan_kmalloc.constprop.0+0xba/0xc0 kasan_kmalloc+0x9/0x10 kmem_cache_alloc_trace+0x138/0x260 btrfs_read_tree_root+0x92/0x360 [btrfs] btrfs_read_fs_root+0x10/0xb0 [btrfs] create_reloc_root+0x47d/0xa10 [btrfs] btrfs_init_reloc_root+0x1e2/0x340 [btrfs] record_root_in_trans+0x2a0/0x370 [btrfs] btrfs_record_root_in_trans+0xf4/0x140 [btrfs] start_transaction+0x1ab/0xe90 [btrfs] btrfs_start_transaction+0x1e/0x20 [btrfs] __btrfs_prealloc_file_range+0x1c2/0xa00 [btrfs] btrfs_prealloc_file_range+0x13/0x20 [btrfs] prealloc_file_extent_cluster+0x29f/0x570 [btrfs] relocate_file_extent_cluster+0x193/0xc30 [btrfs] relocate_data_extent+0x1f8/0x490 [btrfs] relocate_block_group+0x600/0x1060 [btrfs] btrfs_relocate_block_group+0x3a0/0xa00 [btrfs] btrfs_relocate_chunk+0x9e/0x180 [btrfs] btrfs_balance+0x14e4/0x2fc0 [btrfs] btrfs_ioctl_balance+0x47f/0x640 [btrfs] btrfs_ioctl+0x119d/0x8380 [btrfs] do_vfs_ioctl+0x9f5/0x1060 ksys_ioctl+0x67/0x90 __x64_sys_ioctl+0x73/0xb0 do_syscall_64+0xa5/0x370 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 369692: __kasan_slab_free+0x14f/0x210 kasan_slab_free+0xe/0x10 kfree+0xd8/0x270 btrfs_drop_snapshot+0x154c/0x1eb0 [btrfs] clean_dirty_subvols+0x227/0x340 [btrfs] relocate_block_group+0x972/0x1060 [btrfs] btrfs_relocate_block_group+0x3a0/0xa00 [btrfs] btrfs_relocate_chunk+0x9e/0x180 [btrfs] btrfs_balance+0x14e4/0x2fc0 [btrfs] btrfs_ioctl_balance+0x47f/0x640 [btrfs] btrfs_ioctl+0x119d/0x8380 [btrfs] do_vfs_ioctl+0x9f5/0x1060 ksys_ioctl+0x67/0x90 __x64_sys_ioctl+0x73/0xb0 do_syscall_64+0xa5/0x370 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88856f671100 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1552 bytes inside of 4096-byte region [ffff88856f671100, ffff88856f672100) The buggy address belongs to the page: page:ffffea0015bd9c00 refcount:1 mapcount:0 mapping:ffff88864400e600 index:0x0 compound_mapcount: 0 flags: 0x2ffff0000010200(slab|head) raw: 02ffff0000010200 dead000000000100 dead000000000200 ffff88864400e600 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88856f671600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88856f671680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88856f671700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88856f671780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88856f671800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== BTRFS info (device sdi1): 1 enospc errors during balance BTRFS info (device sdi1): balance: ended with status: -28 [CAUSE] The problem happens when finish_ordered_io() get called with balance still running, while the reloc root of that subvolume is already dead. (Tree is swap already done, but tree not yet deleted for possible qgroup usage.) That means root->reloc_root still exists, but that reloc_root can be under btrfs_drop_snapshot(), thus we shouldn't access it. The following race could cause the use-after-free problem: CPU1 | CPU2 -------------------------------------------------------------------------- | relocate_block_group() | |- unset_reloc_control(rc) | |- btrfs_commit_transaction() btrfs_finish_ordered_io() | |- clean_dirty_subvols() |- btrfs_join_transaction() | | |- record_root_in_trans() | | |- btrfs_init_reloc_root() | | |- if (root->reloc_root) | | | | |- root->reloc_root = NULL | | |- btrfs_drop_snapshot(reloc_root); |- reloc_root->last_trans| = trans->transid | ^^^^^^^^^^^^^^^^^^^^^^ Use after free [FIX] Fix it by the following modifications: - Test if the root has dead reloc tree before accessing root->reloc_root If the root has BTRFS_ROOT_DEAD_RELOC_TREE, then we don't need to create or update root->reloc_tree - Clear the BTRFS_ROOT_DEAD_RELOC_TREE flag until we have fully dropped reloc tree To co-operate with above modification, so as long as BTRFS_ROOT_DEAD_RELOC_TREE is still set, we won't try to re-create reloc tree at record_root_in_trans(). Reported-by: Cebtenzzre <cebtenzzre@gmail.com> Fixes: d2311e698578 ("btrfs: relocation: Delay reloc tree deletion after merge_reloc_roots") CC: stable@vger.kernel.org # 5.1+ Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-09-25smb3: Add missing reparse tagsSteve French1-0/+11
Additional reparse tags were described for WSL and file sync. Add missing defines for these tags. Some will be useful for POSIX extensions (as discussed at Storage Developer Conference). Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2019-09-25Merge tag 'for-5.4/io_uring-2019-09-24' of git://git.kernel.dk/linux-blockLinus Torvalds1-24/+217
Pull more io_uring updates from Jens Axboe: "A collection of later fixes and additions, that weren't quite ready for pushing out with the initial pull request. This contains: - Fix potential use-after-free of shadow requests (Jackie) - Fix potential OOM crash in request allocation (Jackie) - kmalloc+memcpy -> kmemdup cleanup (Jackie) - Fix poll crash regression (me) - Fix SQ thread not being nice and giving up CPU for !PREEMPT (me) - Add support for timeouts, making it easier to do epoll_wait() conversions, for instance (me) - Ensure io_uring works without f_ops->read_iter() and f_ops->write_iter() (me)" * tag 'for-5.4/io_uring-2019-09-24' of git://git.kernel.dk/linux-block: io_uring: correctly handle non ->{read,write}_iter() file_operations io_uring: IORING_OP_TIMEOUT support io_uring: use cond_resched() in sqthread io_uring: fix potential crash issue due to io_get_req failure io_uring: ensure poll commands clear ->sqe io_uring: fix use-after-free of shadow_req io_uring: use kmemdup instead of kmalloc and memcpy
2019-09-25Merge branch 'akpm' (patches from Andrew)Linus Torvalds28-283/+163
Merge updates from Andrew Morton: - a few hot fixes - ocfs2 updates - almost all of -mm (slab-generic, slab, slub, kmemleak, kasan, cleanups, debug, pagecache, memcg, gup, pagemap, memory-hotplug, sparsemem, vmalloc, initialization, z3fold, compaction, mempolicy, oom-kill, hugetlb, migration, thp, mmap, madvise, shmem, zswap, zsmalloc) * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (132 commits) mm/zsmalloc.c: fix a -Wunused-function warning zswap: do not map same object twice zswap: use movable memory if zpool support allocate movable memory zpool: add malloc_support_movable to zpool_driver shmem: fix obsolete comment in shmem_getpage_gfp() mm/madvise: reduce code duplication in error handling paths mm: mmap: increase sockets maximum memory size pgoff for 32bits mm/mmap.c: refine find_vma_prev() with rb_last() riscv: make mmap allocation top-down by default mips: use generic mmap top-down layout and brk randomization mips: replace arch specific way to determine 32bit task with generic version mips: adjust brk randomization offset to fit generic version mips: use STACK_TOP when computing mmap base address mips: properly account for stack randomization and stack guard gap arm: use generic mmap top-down layout and brk randomization arm: use STACK_TOP when computing mmap base address arm: properly account for stack randomization and stack guard gap arm64, mm: make randomization selected by generic topdown mmap layout arm64, mm: move generic mmap layout functions to mm arm64: consider stack randomization for mmap base only when necessary ...
2019-09-25mm, fs: move randomize_stack_top from fs to mmAlexandre Ghiti1-20/+0
Patch series "Provide generic top-down mmap layout functions", v6. This series introduces generic functions to make top-down mmap layout easily accessible to architectures, in particular riscv which was the initial goal of this series. The generic implementation was taken from arm64 and used successively by arm, mips and finally riscv. Note that in addition the series fixes 2 issues: - stack randomization was taken into account even if not necessary. - [1] fixed an issue with mmap base which did not take into account randomization but did not report it to arm and mips, so by moving arm64 into a generic library, this problem is now fixed for both architectures. This work is an effort to factorize architecture functions to avoid code duplication and oversights as in [1]. [1]: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1429066.html This patch (of 14): This preparatory commit moves this function so that further introduction of generic topdown mmap layout is contained only in mm/util.c. Link: http://lkml.kernel.org/r/20190730055113.23635-2-alex@ghiti.fr Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Acked-by: Kees Cook <keescook@chromium.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: James Hogan <jhogan@kernel.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25mm,thp: avoid writes to file with THP in pagecacheSong Liu2-0/+11
In previous patch, an application could put part of its text section in THP via madvise(). These THPs will be protected from writes when the application is still running (TXTBSY). However, after the application exits, the file is available for writes. This patch avoids writes to file THP by dropping page cache for the file when the file is open for write. A new counter nr_thps is added to struct address_space. In do_dentry_open(), if the file is open for write and nr_thps is non-zero, we drop page cache for the whole file. Link: http://lkml.kernel.org/r/20190801184244.3169074-8-songliubraving@fb.com Signed-off-by: Song Liu <songliubraving@fb.com> Reported-by: kbuild test robot <lkp@intel.com> Acked-by: Rik van Riel <riel@surriel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Hillf Danton <hdanton@sina.com> Cc: Hugh Dickins <hughd@google.com> Cc: William Kucharski <william.kucharski@oracle.com> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25mm,thp: stats for file backed THPSong Liu2-1/+7
In preparation for non-shmem THP, this patch adds a few stats and exposes them in /proc/meminfo, /sys/bus/node/devices/<node>/meminfo, and /proc/<pid>/task/<tid>/smaps. This patch is mostly a rewrite of Kirill A. Shutemov's earlier version: https://lkml.kernel.org/r/20170126115819.58875-5-kirill.shutemov@linux.intel.com/ Link: http://lkml.kernel.org/r/20190801184244.3169074-5-songliubraving@fb.com Signed-off-by: Song Liu <songliubraving@fb.com> Acked-by: Rik van Riel <riel@surriel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Hillf Danton <hdanton@sina.com> Cc: Hugh Dickins <hughd@google.com> Cc: William Kucharski <william.kucharski@oracle.com> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25mm: remove quicklist page table cachesNicholas Piggin1-4/+0
Patch series "mm: remove quicklist page table caches". A while ago Nicholas proposed to remove quicklist page table caches [1]. I've rebased his patch on the curren upstream and switched ia64 and sh to use generic versions of PTE allocation. [1] https://lore.kernel.org/linux-mm/20190711030339.20892-1-npiggin@gmail.com This patch (of 3): Remove page table allocator "quicklists". These have been around for a long time, but have not got much traction in the last decade and are only used on ia64 and sh architectures. The numbers in the initial commit look interesting but probably don't apply anymore. If anybody wants to resurrect this it's in the git history, but it's unhelpful to have this code and divergent allocator behaviour for minor archs. Also it might be better to instead make more general improvements to page allocator if this is still so slow. Link: http://lkml.kernel.org/r/1565250728-21721-2-git-send-email-rppt@linux.ibm.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25mm: introduce compound_nr()Matthew Wilcox (Oracle)1-1/+1
Replace 1 << compound_order(page) with compound_nr(page). Minor improvements in readability. Link: http://lkml.kernel.org/r/20190721104612.19120-4-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25mm: introduce page_size()Matthew Wilcox (Oracle)1-1/+1
Patch series "Make working with compound pages easier", v2. These three patches add three helpers and convert the appropriate places to use them. This patch (of 3): It's unnecessarily hard to find out the size of a potentially huge page. Replace 'PAGE_SIZE << compound_order(page)' with page_size(page). Link: http://lkml.kernel.org/r/20190721104612.19120-2-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: fix spelling mistake "ambigous" -> "ambiguous"Colin Ian King1-1/+1
There is a spelling mistake in a mlog_bug_on_msg message. Fix it. Link: http://lkml.kernel.org/r/831bdff4-064e-038b-f45d-c4d265cbff1e@linux.alibaba.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: checkpoint appending truncate log transaction before flushingChangwei Ge1-0/+15
Appending truncate log(TA) and and flushing truncate log(TF) are two separated transactions. They can be both committed but not checkpointed. If crash occurs then, both transaction will be replayed with several already released to global bitmap clusters. Then truncate log will be replayed resulting in cluster double free. To reproduce this issue, just crash the host while punching hole to files. Signed-off-by: Changwei Ge <gechangwei@live.cn> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: wait for recovering done after direct unlock requestChangwei Ge1-4/+19
There is a scenario causing ocfs2 umount hang when multiple hosts are rebooting at the same time. NODE1 NODE2 NODE3 send unlock requset to NODE2 dies become recovery master recover NODE2 find NODE2 dead mark resource RECOVERING directly remove lock from grant list calculate usage but RECOVERING marked **miss the window of purging clear RECOVERING To reproduce this issue, crash a host and then umount ocfs2 from another node. To solve this, just let unlock progress wait for recovery done. Link: http://lkml.kernel.org/r/1550124866-20367-1-git-send-email-gechangwei@live.cn Signed-off-by: Changwei Ge <gechangwei@live.cn> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: delete unnecessary checks before brelse()Markus Elfring2-7/+3
brelse() tests whether its argument is NULL and then returns immediately. Thus the tests around the shown calls are not needed. This issue was detected by using the Coccinelle software. Link: http://lkml.kernel.org/r/55cde320-394b-f985-56ce-1a2abea782aa@web.de Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25fs/ocfs2/dir.c: remove set but not used variableszhengbin1-2/+1
Fixes gcc '-Wunused-but-set-variable' warning: fs/ocfs2/dir.c: In function ocfs2_dx_dir_transfer_leaf: fs/ocfs2/dir.c:3653:42: warning: variable new_list set but not used [-Wunused-but-set-variable] Link: http://lkml.kernel.org/r/1566522588-63786-4-git-send-email-joseph.qi@linux.alibaba.com Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reported-by: Hulk Robot <hulkci@huawei.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Changwei Ge <chge@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25fs/ocfs2/file.c: remove set but not used variableszhengbin1-3/+0
Fixes gcc '-Wunused-but-set-variable' warning: fs/ocfs2/file.c: In function ocfs2_prepare_inode_for_write: fs/ocfs2/file.c:2143:9: warning: variable end set but not used [-Wunused-but-set-variable] Link: http://lkml.kernel.org/r/1566522588-63786-3-git-send-email-joseph.qi@linux.alibaba.com Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reported-by: Hulk Robot <hulkci@huawei.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Changwei Ge <chge@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25fs/ocfs2/namei.c: remove set but not used variableszhengbin1-2/+0
Fixes gcc '-Wunused-but-set-variable' warning: fs/ocfs2/namei.c: In function ocfs2_create_inode_in_orphan: fs/ocfs2/namei.c:2503:23: warning: variable di set but not used [-Wunused-but-set-variable] Link: http://lkml.kernel.org/r/1566522588-63786-2-git-send-email-joseph.qi@linux.alibaba.com Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reported-by: Hulk Robot <hulkci@huawei.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Changwei Ge <chge@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: remove unused ocfs2_orphan_scan_exit() declarationGuozhonghua1-2/+1
ocfs2_orphan_scan_exit() is declared but not implemented. Also perform a minor cleanup in ocfs2_link_credits() Link: http://lkml.kernel.org/r/71604351584F6A4EBAE558C676F37CA4014FC208AC@H3CMLB12-EX.srv.huawei-3com.com Signed-off-by: guozhonghua <guozhonghua@h3c.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: remove unused ocfs2_calc_tree_trunc_credits()Guozhonghua1-28/+0
ocfs2_calc_tree_trunc_credits() is not called anywhere. Link: http://lkml.kernel.org/r/71604351584F6A4EBAE558C676F37CA4014FC2050F@H3CMLB12-EX.srv.huawei-3com.com Signed-off-by: guozhonghua <guozhonghua@h3c.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: further debugfs cleanupsGreg Kroah-Hartman9-180/+61
There is no need to check return value of debugfs_create functions, but the last sweep through ocfs missed a number of places where this was happening. There is also no need to save the individual dentries for the debugfs files, as everything is can just be removed at once when the directory is removed. By getting rid of the file dentries for the debugfs entries, a bit of local memory can be saved as well. [colin.king@canonical.com: ensure ret is set to zero before returning] Link: http://lkml.kernel.org/r/20190807121929.28918-1-colin.king@canonical.com Link: http://lkml.kernel.org/r/20190731132119.GA12603@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Jia Guo <guojia12@huawei.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25jbd2: remove jbd2_journal_inode_add_[write|wait]Joseph Qi2-14/+0
Since ext4/ocfs2 are using jbd2_inode dirty range scoping APIs now, jbd2_journal_inode_add_[write|wait] are not used any more, remove them. Link: http://lkml.kernel.org/r/1562977611-8412-2-git-send-email-joseph.qi@linux.alibaba.com Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Ross Zwisler <zwisler@google.com> Acked-by: Changwei Ge <chge@linux.alibaba.com> Cc: Gang He <ghe@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Jun Piao <piaojun@huawei.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25ocfs2: use jbd2_inode dirty range scopingJoseph Qi4-11/+28
6ba0e7dc64a5 ("jbd2: introduce jbd2_inode dirty range scoping") allow us scoping each of the inode dirty ranges associated with a given transaction, and ext4 already does this way. Now let's also use the newly introduced jbd2_inode dirty range scoping to prevent us from waiting forever when trying to complete a journal transaction in ocfs2. Link: http://lkml.kernel.org/r/1562977611-8412-1-git-send-email-joseph.qi@linux.alibaba.com Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Ross Zwisler <zwisler@google.com> Reviewed-by: Changwei Ge <chge@linux.alibaba.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25fat: work around race with userspace's read via blockdev while mountingOGAWA Hirofumi2-2/+14
If userspace reads the buffer via blockdev while mounting, sb_getblk()+modify can race with buffer read via blockdev. For example, FS userspace bh = sb_getblk() modify bh->b_data read ll_rw_block(bh) fill bh->b_data by on-disk data /* lost modified data by FS */ set_buffer_uptodate(bh) set_buffer_uptodate(bh) Userspace should not use the blockdev while mounting though, the udev seems to be already doing this. Although I think the udev should try to avoid this, workaround the race by small overhead. Link: http://lkml.kernel.org/r/87pnk7l3sw.fsf_-_@mail.parknet.co.jp Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reported-by: Jan Stancek <jstancek@redhat.com> Tested-by: Jan Stancek <jstancek@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-24pNFS/filelayout: enable LAYOUTGET on OPENOlga Kornievskaia1-0/+1
Add the flag to the filelayout driver to add LAYOUTGET to the OPEN compound. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-09-24NFS: Optimise the default readahead sizeTrond Myklebust2-9/+8
In the years since the max readahead size was fixed in NFS, a number of things have happened: - Users can now set the value directly using /sys/class/bdi - NFS max supported block sizes have increased by several orders of magnitude from 64K to 1MB. - Disk access latencies are orders of magnitude faster due to SSD + NVME. In particular note that if the server is advertising 1MB as the optimal read size, as that will set the readahead size to 15MB. Let's therefore adjust down, and try to default to VM_READAHEAD_PAGES. However let's inform the VM about our preferred block size so that it can choose to round up in cases where that makes sense. Reported-by: Alkis Georgopoulos <alkisg@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-09-24Merge branch 'work.mount3' of ↵Linus Torvalds4-459/+380
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull more mount API conversions from Al Viro: "Assorted conversions of options parsing to new API. gfs2 is probably the most serious one here; the rest is trivial stuff. Other things in what used to be #work.mount are going to wait for the next cycle (and preferably go via git trees of the filesystems involved)" * 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: gfs2: Convert gfs2 to fs_context vfs: Convert spufs to use the new mount API vfs: Convert hypfs to use the new mount API hypfs: Fix error number left in struct pointer member vfs: Convert functionfs to use the new mount API vfs: Convert bpf to use the new mount API
2019-09-24xfs: avoid unused to_mp() function warningAustin Kim1-13/+0
to_mp() was first introduced with the following commit: 'commit 801cc4e17a34c ("xfs: debug mode forced buffered write failure")' But the user of to_mp() was removed by below commit: 'commit f8c47250ba46e ("xfs: convert drop_writes to use the errortag mechanism")' So kernel build with clang throws below warning message: fs/xfs/xfs_sysfs.c:72:1: warning: unused function 'to_mp' [-Wunused-function] to_mp(struct kobject *kobject) Hence to_mp() might be removed safely to get rid of warning message. Signed-off-by: Austin Kim <austindh.kim@gmail.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-09-24xfs: log proper length of superblockEric Sandeen1-1/+1
xfs_trans_log_buf takes first byte, last byte as args. In this case, it should be from 0 to sizeof() - 1. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-09-24Btrfs: fix race setting up and completing qgroup rescan workersFilipe Manana1-14/+19
There is a race between setting up a qgroup rescan worker and completing a qgroup rescan worker that can lead to callers of the qgroup rescan wait ioctl to either not wait for the rescan worker to complete or to hang forever due to missing wake ups. The following diagram shows a sequence of steps that illustrates the race. CPU 1 CPU 2 CPU 3 btrfs_ioctl_quota_rescan() btrfs_qgroup_rescan() qgroup_rescan_init() mutex_lock(&fs_info->qgroup_rescan_lock) spin_lock(&fs_info->qgroup_lock) fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN init_completion( &fs_info->qgroup_rescan_completion) fs_info->qgroup_rescan_running = true mutex_unlock(&fs_info->qgroup_rescan_lock) spin_unlock(&fs_info->qgroup_lock) btrfs_init_work() --> starts the worker btrfs_qgroup_rescan_worker() mutex_lock(&fs_info->qgroup_rescan_lock) fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN mutex_unlock(&fs_info->qgroup_rescan_lock) starts transaction, updates qgroup status item, etc btrfs_ioctl_quota_rescan() btrfs_qgroup_rescan() qgroup_rescan_init() mutex_lock(&fs_info->qgroup_rescan_lock) spin_lock(&fs_info->qgroup_lock) fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN init_completion( &fs_info->qgroup_rescan_completion) fs_info->qgroup_rescan_running = true mutex_unlock(&fs_info->qgroup_rescan_lock) spin_unlock(&fs_info->qgroup_lock) btrfs_init_work() --> starts another worker mutex_lock(&fs_info->qgroup_rescan_lock) fs_info->qgroup_rescan_running = false mutex_unlock(&fs_info->qgroup_rescan_lock) complete_all(&fs_info->qgroup_rescan_completion) Before the rescan worker started by the task at CPU 3 completes, if another task calls btrfs_ioctl_quota_rescan(), it will get -EINPROGRESS because the flag BTRFS_QGROUP_STATUS_FLAG_RESCAN is set at fs_info->qgroup_flags, which is expected and correct behaviour. However if other task calls btrfs_ioctl_quota_rescan_wait() before the rescan worker started by the task at CPU 3 completes, it will return immediately without waiting for the new rescan worker to complete, because fs_info->qgroup_rescan_running is set to false by CPU 2. This race is making test case btrfs/171 (from fstests) to fail often: btrfs/171 9s ... - output mismatch (see /home/fdmanana/git/hub/xfstests/results//btrfs/171.out.bad) --- tests/btrfs/171.out 2018-09-16 21:30:48.505104287 +0100 +++ /home/fdmanana/git/hub/xfstests/results//btrfs/171.out.bad 2019-09-19 02:01:36.938486039 +0100 @@ -1,2 +1,3 @@ QA output created by 171 +ERROR: quota rescan failed: Operation now in progress Silence is golden ... (Run 'diff -u /home/fdmanana/git/hub/xfstests/tests/btrfs/171.out /home/fdmanana/git/hub/xfstests/results//btrfs/171.out.bad' to see the entire diff) That is because the test calls the btrfs-progs commands "qgroup quota rescan -w", "qgroup assign" and "qgroup remove" in a sequence that makes calls to the rescan start ioctl fail with -EINPROGRESS (note the "btrfs" commands 'qgroup assign' and 'qgroup remove' often call the rescan start ioctl after calling the qgroup assign ioctl, btrfs_ioctl_qgroup_assign()), since previous waits didn't actually wait for a rescan worker to complete. Another problem the race can cause is missing wake ups for waiters, since the call to complete_all() happens outside a critical section and after clearing the flag BTRFS_QGROUP_STATUS_FLAG_RESCAN. In the sequence diagram above, if we have a waiter for the first rescan task (executed by CPU 2), then fs_info->qgroup_rescan_completion.wait is not empty, and if after the rescan worker clears BTRFS_QGROUP_STATUS_FLAG_RESCAN and before it calls complete_all() against fs_info->qgroup_rescan_completion, the task at CPU 3 calls init_completion() against fs_info->qgroup_rescan_completion which re-initilizes its wait queue to an empty queue, therefore causing the rescan worker at CPU 2 to call complete_all() against an empty queue, never waking up the task waiting for that rescan worker. Fix this by clearing BTRFS_QGROUP_STATUS_FLAG_RESCAN and setting fs_info->qgroup_rescan_running to false in the same critical section, delimited by the mutex fs_info->qgroup_rescan_lock, as well as doing the call to complete_all() in that same critical section. This gives the protection needed to avoid rescan wait ioctl callers not waiting for a running rescan worker and the lost wake ups problem, since setting that rescan flag and boolean as well as initializing the wait queue is done already in a critical section delimited by that mutex (at qgroup_rescan_init()). Fixes: 57254b6ebce4ce ("Btrfs: add ioctl to wait for qgroup rescan completion") Fixes: d2c609b834d62f ("btrfs: properly track when rescan worker is running") CC: stable@vger.kernel.org # 4.4+ Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-09-24fuse: Make fuse_args_to_req staticYueHaibing1-1/+1
Fix sparse warning: fs/fuse/dev.c:468:6: warning: symbol 'fuse_args_to_req' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Fixes: 68583165f962 ("fuse: add pages to fuse_args") Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24fuse: fix memleak in cuse_channel_openzhengbin1-0/+1
If cuse_send_init fails, need to fuse_conn_put cc->fc. cuse_channel_open->fuse_conn_init->refcount_set(&fc->count, 1) ->fuse_dev_alloc->fuse_conn_get ->fuse_dev_free->fuse_conn_put Fixes: cc080e9e9be1 ("fuse: introduce per-instance fuse_dev structure") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24fuse: fix beyond-end-of-page access in fuse_parse_cache()Tejun Heo1-1/+3
With DEBUG_PAGEALLOC on, the following triggers. BUG: unable to handle page fault for address: ffff88859367c000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3001067 P4D 3001067 PUD 406d3a8067 PMD 406d30c067 PTE 800ffffa6c983060 Oops: 0000 [#1] SMP DEBUG_PAGEALLOC CPU: 38 PID: 3110657 Comm: python2.7 RIP: 0010:fuse_readdir+0x88f/0xe7a [fuse] Code: 49 8b 4d 08 49 39 4e 60 0f 84 44 04 00 00 48 8b 43 08 43 8d 1c 3c 4d 01 7e 68 49 89 dc 48 03 5c 24 38 49 89 46 60 8b 44 24 30 <8b> 4b 10 44 29 e0 48 89 ca 48 83 c1 1f 48 83 e1 f8 83 f8 17 49 89 RSP: 0018:ffffc90035edbde0 EFLAGS: 00010286 RAX: 0000000000001000 RBX: ffff88859367bff0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88859367bfed RDI: 0000000000920907 RBP: ffffc90035edbe90 R08: 000000000000014b R09: 0000000000000004 R10: ffff88859367b000 R11: 0000000000000000 R12: 0000000000000ff0 R13: ffffc90035edbee0 R14: ffff889fb8546180 R15: 0000000000000020 FS: 00007f80b5f4a740(0000) GS:ffff889fffa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88859367c000 CR3: 0000001c170c2001 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: iterate_dir+0x122/0x180 __x64_sys_getdents+0xa6/0x140 do_syscall_64+0x42/0x100 entry_SYSCALL_64_after_hwframe+0x44/0xa9 It's in fuse_parse_cache(). %rbx (ffff88859367bff0) is fuse_dirent pointer - addr + offset. FUSE_DIRENT_SIZE() is trying to dereference namelen off of it but that derefs into the next page which is disabled by pagealloc debug causing a PF. This is caused by dirent->namelen being accessed before ensuring that there's enough bytes in the page for the dirent. Fix it by pushing down reclen calculation. Signed-off-by: Tejun Heo <tj@kernel.org> Fixes: 5d7bc7e8680c ("fuse: allow using readdir cache") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24fuse: unexport fuse_put_requestArnd Bergmann1-1/+0
This function has been made static, which now causes a compile-time warning: WARNING: "fuse_put_request" [vmlinux] is a static EXPORT_SYMBOL_GPL Remove the unneeded export. Fixes: 66abc3599c3c ("fuse: unexport request ops") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24fuse: kmemcg account fs dataKhazhismel Kumykov3-4/+6
account per-file, dentry, and inode data blockdev/superblock and temporary per-request data was left alone, as this usually isn't accounted Reviewed-by: Shakeel Butt <shakeelb@google.com> Signed-off-by: Khazhismel Kumykov <khazhy@google.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24fuse: on 64-bit store time in d_fsdata directlyKhazhismel Kumykov1-6/+30
Implements the optimization noted in commit f75fdf22b0a8 ("fuse: don't use ->d_time"), as the additional memory can be significant. (In particular, on SLAB configurations this 8-byte alloc becomes 32 bytes). Per-dentry, this can consume significant memory. Reviewed-by: Shakeel Butt <shakeelb@google.com> Signed-off-by: Khazhismel Kumykov <khazhy@google.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24fuse: fix missing unlock_page in fuse_writepage()Vasily Averin1-0/+1
unlock_page() was missing in case of an already in-flight write against the same page. Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Fixes: ff17be086477 ("fuse: writepage: skip already in flight") Cc: <stable@vger.kernel.org> # v3.13 Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-09-24io_uring: compare cached_cq_tail with cq.head in_io_uring_pollyangerkun1-1/+1
After 75b28af("io_uring: allocate the two rings together"), we compare sq.head with cached_cq_tail to determine does there any cq invalid. Actually, we should use cq.head. Fixes: 75b28affdd6a ("io_uring: allocate the two rings together") Signed-off-by: yangerkun <yangerkun@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-24Btrfs: fix missing error return if writeback for extent buffer never startedFilipe Manana1-0/+4
If lock_extent_buffer_for_io() fails, it returns a negative value, but its caller btree_write_cache_pages() ignores such error. This means that a call to flush_write_bio(), from lock_extent_buffer_for_io(), might have failed. We should make btree_write_cache_pages() notice such error values and stop immediatelly, making sure filemap_fdatawrite_range() returns an error to the transaction commit path. A failure from flush_write_bio() should also result in the endio callback end_bio_extent_buffer_writepage() being invoked, which sets the BTRFS_FS_*_ERR bits appropriately, so that there's no risk a transaction or log commit doesn't catch a writeback failure. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-09-24btrfs: adjust dirty_metadata_bytes after writeback failure of extent bufferDennis Zhou1-0/+9
Before, if a eb failed to write out, we would end up triggering a BUG_ON(). As of f4340622e0226 ("btrfs: extent_io: Move the BUG_ON() in flush_write_bio() one level up"), we no longer BUG_ON(), so we should make life consistent and add back the unwritten bytes to dirty_metadata_bytes. Fixes: f4340622e022 ("btrfs: extent_io: Move the BUG_ON() in flush_write_bio() one level up") CC: stable@vger.kernel.org # 5.2+ Reviewed-by: Filipe Manana <fdmanana@kernel.org> Signed-off-by: Dennis Zhou <dennis@kernel.org> Signed-off-by: David Sterba <dsterba@suse.com>
2019-09-24Btrfs: fix selftests failure due to uninitialized i_mode in test inodesFilipe Manana1-1/+7
Some of the self tests create a test inode, setup some extents and then do calls to btrfs_get_extent() to test that the corresponding extent maps exist and are correct. However btrfs_get_extent(), since the 5.2 merge window, now errors out when it finds a regular or prealloc extent for an inode that does not correspond to a regular file (its ->i_mode is not S_IFREG). This causes the self tests to fail sometimes, specially when KASAN, slub_debug and page poisoning are enabled: $ modprobe btrfs modprobe: ERROR: could not insert 'btrfs': Invalid argument $ dmesg [ 9414.691648] Btrfs loaded, crc32c=crc32c-intel, debug=on, assert=on, integrity-checker=on, ref-verify=on [ 9414.692655] BTRFS: selftest: sectorsize: 4096 nodesize: 4096 [ 9414.692658] BTRFS: selftest: running btrfs free space cache tests [ 9414.692918] BTRFS: selftest: running extent only tests [ 9414.693061] BTRFS: selftest: running bitmap only tests [ 9414.693366] BTRFS: selftest: running bitmap and extent tests [ 9414.696455] BTRFS: selftest: running space stealing from bitmap to extent tests [ 9414.697131] BTRFS: selftest: running extent buffer operation tests [ 9414.697133] BTRFS: selftest: running btrfs_split_item tests [ 9414.697564] BTRFS: selftest: running extent I/O tests [ 9414.697583] BTRFS: selftest: running find delalloc tests [ 9415.081125] BTRFS: selftest: running find_first_clear_extent_bit test [ 9415.081278] BTRFS: selftest: running extent buffer bitmap tests [ 9415.124192] BTRFS: selftest: running inode tests [ 9415.124195] BTRFS: selftest: running btrfs_get_extent tests [ 9415.127909] BTRFS: selftest: running hole first btrfs_get_extent test [ 9415.128343] BTRFS critical (device (efault)): regular/prealloc extent found for non-regular inode 256 [ 9415.131428] BTRFS: selftest: fs/btrfs/tests/inode-tests.c:904 expected a real extent, got 0 This happens because the test inodes are created without ever initializing the i_mode field of the inode, and neither VFS's new_inode() nor the btrfs callback btrfs_alloc_inode() initialize the i_mode. Initialization of the i_mode is done through the various callbacks used by the VFS to create new inodes (regular files, directories, symlinks, tmpfiles, etc), which all call btrfs_new_inode() which in turn calls inode_init_owner(), which sets the inode's i_mode. Since the tests only uses new_inode() to create the test inodes, the i_mode was never initialized. This always happens on a VM I used with kasan, slub_debug and many other debug facilities enabled. It also happened to someone who reported this on bugzilla (on a 5.3-rc). Fix this by setting i_mode to S_IFREG at btrfs_new_test_inode(). Fixes: 6bf9e4bd6a2778 ("btrfs: inode: Verify inode mode to avoid NULL pointer dereference") Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204397 Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-09-24CIFS: fix max ea value sizeMurphy Zhou1-1/+1
It should not be larger then the slab max buf size. If user specifies a larger size, it passes this check and goes straightly to SMB2_set_info_init performing an insecure memcpy. Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com> CC: Stable <stable@vger.kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2019-09-24fs/cifs/sess.c: Remove set but not used variable 'capabilities'zhengbin1-2/+1
Fixes gcc '-Wunused-but-set-variable' warning: fs/cifs/sess.c: In function sess_auth_lanman: fs/cifs/sess.c:910:8: warning: variable capabilities set but not used [-Wunused-but-set-variable] Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2019-09-24fs/cifs/smb2pdu.c: Make SMB2_notify_init staticzhengbin1-1/+1
Fix sparse warnings: fs/cifs/smb2pdu.c:3200:1: warning: symbol 'SMB2_notify_init' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2019-09-24smb3: fix leak in "open on server" perf counterSteve French2-0/+6
We were not bumping up the "open on server" (num_remote_opens) counter (in some cases) on opens of the share root so could end up showing as a negative value. CC: Stable <stable@vger.kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-09-23nfsd: fix nfs read eof detectionTrond Myklebust6-50/+41
Currently, the knfsd server assumes that a short read indicates an end of file. That assumption is incorrect. The short read means that either we've hit the end of file, or we've hit a read error. In the case of a read error, the client may want to retry (as per the implementation recommendations in RFC1813 and RFC7530), but currently it is being told that it hit an eof. Move the code to detect eof from version specific code into the generic nfsd read. Report eof only in the two following cases: 1) read() returns a zero length short read with no error. 2) the offset+length of the read is >= the file size. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-09-23xfs: revert 1baa2800e62d ("xfs: remove the unused XFS_ALLOC_USERDATA flag")Darrick J. Wong2-5/+10
Revert this commit, as it caused periodic regressions in xfs/173 w/ 1k blocks. [1] https://lore.kernel.org/lkml/20190919014602.GN15734@shao2-debian/ Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
2019-09-23xfs: removed unneeded variableAliasgar Surti1-2/+1
Returned value directly instead of using variable as it wasn't updated. Signed-off-by: Aliasgar Surti <aliasgar.surti500@gmail.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-09-23xfs: convert inode to extent format after extent merge due to shiftBrian Foster1-0/+5
The collapse range operation can merge extents if two newly adjacent extents are physically contiguous. If the extent count is reduced on a btree format inode, a change to extent format might be necessary. This format change currently occurs as a side effect of the file size update after extents have been shifted for the collapse. This codepath ultimately calls xfs_bunmapi(), which happens to check for and execute the format conversion even if there were no blocks removed from the mapping. While this ultimately puts the inode into the correct state, the fact the format conversion occurs in a separate transaction from the change that called for it is a problem. If an extent shift transaction commits and the filesystem happens to crash before the format conversion, the inode fork is left in a corrupted state after log recovery. The inode fork verifier fails and xfs_repair ultimately nukes the inode. This problem was originally reproduced by generic/388. Similar to how the insert range extent split code handles extent to btree conversion, update the collapse range extent merge code to handle btree to extent format conversion in the same transaction that merges the extents. This ensures that the inode fork format remains consistent if the filesystem happens to crash in the middle of a collapse range operation that changes the inode fork format. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-09-23Merge tag 'selinux-pr-20190917' of ↵Linus Torvalds3-7/+41
git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux Pull selinux updates from Paul Moore: - Add LSM hooks, and SELinux access control hooks, for dnotify, fanotify, and inotify watches. This has been discussed with both the LSM and fs/notify folks and everybody is good with these new hooks. - The LSM stacking changes missed a few calls to current_security() in the SELinux code; we fix those and remove current_security() for good. - Improve our network object labeling cache so that we always return the object's label, even when under memory pressure. Previously we would return an error if we couldn't allocate a new cache entry, now we always return the label even if we can't create a new cache entry for it. - Convert the sidtab atomic_t counter to a normal u32 with READ/WRITE_ONCE() and memory barrier protection. - A few patches to policydb.c to clean things up (remove forward declarations, long lines, bad variable names, etc) * tag 'selinux-pr-20190917' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: lsm: remove current_security() selinux: fix residual uses of current_security() for the SELinux blob selinux: avoid atomic_t usage in sidtab fanotify, inotify, dnotify, security: add security hook for fs notifications selinux: always return a secid from the network caches if we find one selinux: policydb - rename type_val_to_struct_array selinux: policydb - fix some checkpatch.pl warnings selinux: shuffle around policydb.c to get rid of forward declarations
2019-09-23io_uring: correctly handle non ->{read,write}_iter() file_operationsJens Axboe1-6/+54
Currently we just -EINVAL a read or write to an fd that isn't backed by ->read_iter() or ->write_iter(). But we can handle them just fine, as long as we punt fo async context first. Implement a simple loop function for doing ->read() or ->write() instead, and ensure we call it appropriately. Reported-by: 李通洲 <carter.li@eoitek.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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