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2020-10-03mm: remove compat_process_vm_{readv,writev}Christoph Hellwig4-10/+8
Now that import_iovec handles compat iovecs, the native syscalls can be used for the compat case as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-10-03fs: remove compat_sys_vmspliceChristoph Hellwig4-4/+4
Now that import_iovec handles compat iovecs, the native vmsplice syscall can be used for the compat case as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-10-03fs: remove the compat readv/writev syscallsChristoph Hellwig4-8/+8
Now that import_iovec handles compat iovecs, the native readv and writev syscalls can be used for the compat case as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-10-02tools/power/acpi: Serialize MakefileThomas Renninger1-0/+2
Before this patch you get tools/power/acpi/Makefile.rules included in parallel trying to copy KERNEL_INCLUDE multiple times: make -j20 acpi DESCEND power/acpi DESCEND tools/acpidbg DESCEND tools/acpidump DESCEND tools/ec MKDIR include MKDIR include MKDIR include CP include CP include cp: cannot create directory '/home/abuild/rpmbuild/BUILD/linux-5.7.7+git20200917.10b82d517648/tools/power/acpi/include/acpi': File exists make[2]: *** [../../Makefile.rules:20: /home/abuild/rpmbuild/BUILD/linux-5.7.7+git20200917.10b82d517648/tools/power/acpi/include] Error 1 make[1]: *** [Makefile:16: acpidbg] Error 2 make[1]: *** Waiting for unfinished jobs.... with this patch each subdirectory will be processed serialized: DESCEND power/acpi DESCEND tools/acpidbg MKDIR include CP include CC tools/acpidbg/acpidbg.o LD acpidbg STRIP acpidbg DESCEND tools/acpidump CC tools/acpidump/apdump.o ... LD acpidump STRIP acpidump DESCEND tools/ec CC tools/ec/ec_access.o LD ec STRIP ec Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-10-02tools: Avoid comma separated statementsJoe Perches4-128/+210
Use semicolons and braces. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2020-10-02objtool: Permit __kasan_check_{read,write} under UACCESSJann Horn1-0/+2
Building linux-next with JUMP_LABEL=n and KASAN=y, I got this objtool warning: arch/x86/lib/copy_mc.o: warning: objtool: copy_mc_to_user()+0x22: call to __kasan_check_read() with UACCESS enabled What happens here is that copy_mc_to_user() branches on a static key in a UACCESS region:         __uaccess_begin();         if (static_branch_unlikely(&copy_mc_fragile_key))                 ret = copy_mc_fragile(to, from, len);         ret = copy_mc_generic(to, from, len);         __uaccess_end(); and the !CONFIG_JUMP_LABEL version of static_branch_unlikely() uses static_key_enabled(), which uses static_key_count(), which uses atomic_read(), which calls instrument_atomic_read(), which uses kasan_check_read(), which is __kasan_check_read(). Let's permit these KASAN helpers in UACCESS regions - static keys should probably work under UACCESS, I think. PeterZ adds: It's not a matter of permitting, it's a matter of being safe and correct. In this case it is, because it's a thin wrapper around check_memory_region() which was already marked safe. check_memory_region() is correct because the only thing it ends up calling is kasa_report() and that is also marked safe because that is annotated with user_access_save/restore() before it does anything else. On top of that, all of KASAN is noinstr, so nothing in here will end up in tracing and/or call schedule() before the user_access_save(). Signed-off-by: Jann Horn <jannh@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2020-10-02Merge branch 'for-next/mte' into for-next/coreWill Deacon1-0/+2
Add userspace support for the Memory Tagging Extension introduced by Armv8.5. (Catalin Marinas and others) * for-next/mte: (30 commits) arm64: mte: Fix typo in memory tagging ABI documentation arm64: mte: Add Memory Tagging Extension documentation arm64: mte: Kconfig entry arm64: mte: Save tags when hibernating arm64: mte: Enable swap of tagged pages mm: Add arch hooks for saving/restoring tags fs: Handle intra-page faults in copy_mount_options() arm64: mte: ptrace: Add NT_ARM_TAGGED_ADDR_CTRL regset arm64: mte: ptrace: Add PTRACE_{PEEK,POKE}MTETAGS support arm64: mte: Allow {set,get}_tagged_addr_ctrl() on non-current tasks arm64: mte: Restore the GCR_EL1 register after a suspend arm64: mte: Allow user control of the generated random tags via prctl() arm64: mte: Allow user control of the tag check mode via prctl() mm: Allow arm64 mmap(PROT_MTE) on RAM-based files arm64: mte: Validate the PROT_MTE request via arch_validate_flags() mm: Introduce arch_validate_flags() arm64: mte: Add PROT_MTE support to mmap() and mprotect() mm: Introduce arch_calc_vm_flag_bits() arm64: mte: Tags-aware aware memcmp_pages() implementation arm64: Avoid unnecessary clear_user_page() indirection ...
2020-09-30tools: gpio: add debounce support to gpio-event-monKent Gibson1-3/+17
Add support for debouncing monitored lines to gpio-event-mon. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30tools: gpio: add multi-line monitoring to gpio-event-monKent Gibson1-11/+34
Extend gpio-event-mon to support monitoring multiple lines. This would require multiple lineevent requests to implement using uAPI v1, but can be performed with a single line request using uAPI v2. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30tools: gpio: port gpio-event-mon to v2 uAPIKent Gibson1-44/+47
Port the gpio-event-mon tool to the latest GPIO uAPI. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30tools: gpio: port gpio-hammer to v2 uAPIKent Gibson3-45/+197
Port the gpio-hammer tool to the latest GPIO uAPI. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30tools: gpio: rename nlines to num_linesKent Gibson3-26/+26
Rename nlines to num_lines to be consistent with other usage for fields describing the number of entries in an array. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30tools: gpio: port gpio-watch to v2 uAPIKent Gibson1-8/+8
Port the gpio-watch tool to the latest GPIO uAPI. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30tools: gpio: port lsgpio to v2 uAPIKent Gibson1-22/+38
Port the lsgpio tool to the latest GPIO uAPI. Signed-off-by: Kent Gibson <warthog618@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller3-2/+8
Alexei Starovoitov says: ==================== pull-request: bpf 2020-09-29 The following pull-request contains BPF updates for your *net* tree. We've added 7 non-merge commits during the last 14 day(s) which contain a total of 7 files changed, 28 insertions(+), 8 deletions(-). The main changes are: 1) fix xdp loading regression in libbpf for old kernels, from Andrii. 2) Do not discard packet when NETDEV_TX_BUSY, from Magnus. 3) Fix corner cases in libbpf related to endianness and kconfig, from Tony. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-26Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-1/+1
Pull more kvm fixes from Paolo Bonzini: "Five small fixes. The nested migration bug will be fixed with a better API in 5.10 or 5.11, for now this is a fix that works with existing userspace but keeps the current ugly API" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: SVM: Add a dedicated INVD intercept routine KVM: x86: Reset MMU context if guest toggles CR4.SMAP or CR4.PKE KVM: x86: fix MSR_IA32_TSC read for nested migration selftests: kvm: Fix assert failure in single-step test KVM: x86: VMX: Make smaller physical guest address space support user-configurable
2020-09-25rseq/selftests: Test MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQPeter Oskolkov2-1/+224
Based on Google-internal RSEQ work done by Paul Turner and Andrew Hunter. This patch adds a selftest for MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ. The test quite often fails without the previous patch in this patchset, but consistently passes with it. Signed-off-by: Peter Oskolkov <posk@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://lkml.kernel.org/r/20200923233618.2572849-3-posk@google.com
2020-09-25rseq/selftests,x86_64: Add rseq_offset_deref_addv()Peter Oskolkov1-0/+57
This patch adds rseq_offset_deref_addv() function to tools/testing/selftests/rseq/rseq-x86.h, to be used in a selftest in the next patch in the patchset. Once an architecture adds support for this function they should define "RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV". Signed-off-by: Peter Oskolkov <posk@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://lkml.kernel.org/r/20200923233618.2572849-2-posk@google.com
2020-09-24libbpf: Fix XDP program load regression for old kernelsAndrii Nakryiko1-1/+1
Fix regression in libbpf, introduced by XDP link change, which causes XDP programs to fail to be loaded into kernel due to specified BPF_XDP expected_attach_type. While kernel doesn't enforce expected_attach_type for BPF_PROG_TYPE_XDP, some old kernels already support XDP program, but they don't yet recognize expected_attach_type field in bpf_attr, so setting it to non-zero value causes program load to fail. Luckily, libbpf already has a mechanism to deal with such cases, so just make expected_attach_type optional for XDP programs. Fixes: dc8698cac7aa ("libbpf: Add support for BPF XDP link") Reported-by: Nikita Shirokov <tehnerd@tehnerd.com> Reported-by: Udip Pant <udippant@fb.com> Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200924171705.3803628-1-andriin@fb.com
2020-09-24Merge tag 'trace-v5.9-rc5-2' of ↵Linus Torvalds1-0/+25
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull bootconfig fixes from Steven Rostedt: "A couple of fixes for bootconfig. Masami discovered two bugs which this fixes and he added tests to cover these issues. - Fix a bug that breaks bootconfig tree nodes - Fix a bug that does not truncate whitespace properly - Add tests to cover the above two cases" * tag 'trace-v5.9-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tools/bootconfig: Add testcase for tailing space tools/bootconfig: Add testcases for repeated key with brace lib/bootconfig: Fix to remove tailing spaces after value lib/bootconfig: Fix a bug of breaking existing tree nodes
2020-09-23selftests: kvm: Fix assert failure in single-step testYang Weijiang1-1/+1
This is a follow-up patch to fix an issue left in commit: 98b0bf02738004829d7e26d6cb47b2e469aaba86 selftests: kvm: Use a shorter encoding to clear RAX With the change in the commit, we also need to modify "xor" instruction length from 3 to 2 in array ss_size accordingly to pass below check: for (i = 0; i < (sizeof(ss_size) / sizeof(ss_size[0])); i++) { target_rip += ss_size[i]; CLEAR_DEBUG(); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; debug.arch.debugreg[7] = 0x00000400; APPLY_DEBUG(); vcpu_run(vm, VCPU_ID); TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG && run->debug.arch.exception == DB_VECTOR && run->debug.arch.pc == target_rip && run->debug.arch.dr6 == target_dr6, "SINGLE_STEP[%d]: exit %d exception %d rip 0x%llx " "(should be 0x%llx) dr6 0x%llx (should be 0x%llx)", i, run->exit_reason, run->debug.arch.exception, run->debug.arch.pc, target_rip, run->debug.arch.dr6, target_dr6); } Reported-by: kernel test robot <rong.a.chen@intel.com> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> Message-Id: <20200826015524.13251-1-weijiang.yang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-09-23fs: remove compat_sys_mountChristoph Hellwig3-3/+3
compat_sys_mount is identical to the regular sys_mount now, so remove it and use the native version everywhere. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-09-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds6-4/+69
Pull networking fixes from Jakub Kicinski: - fix failure to add bond interfaces to a bridge, the offload-handling code was too defensive there and recent refactoring unearthed that. Users complained (Ido) - fix unnecessarily reflecting ECN bits within TOS values / QoS marking in TCP ACK and reset packets (Wei) - fix a deadlock with bpf iterator. Hopefully we're in the clear on this front now... (Yonghong) - BPF fix for clobbering r2 in bpf_gen_ld_abs (Daniel) - fix AQL on mt76 devices with FW rate control and add a couple of AQL issues in mac80211 code (Felix) - fix authentication issue with mwifiex (Maximilian) - WiFi connectivity fix: revert IGTK support in ti/wlcore (Mauro) - fix exception handling for multipath routes via same device (David Ahern) - revert back to a BH spin lock flavor for nsid_lock: there are paths which do require the BH context protection (Taehee) - fix interrupt / queue / NAPI handling in the lantiq driver (Hauke) - fix ife module load deadlock (Cong) - make an adjustment to netlink reply message type for code added in this release (the sole change touching uAPI here) (Michal) - a number of fixes for small NXP and Microchip switches (Vladimir) [ Pull request acked by David: "you can expect more of this in the future as I try to delegate more things to Jakub" ] * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (167 commits) net: mscc: ocelot: fix some key offsets for IP4_TCP_UDP VCAP IS2 entries net: dsa: seville: fix some key offsets for IP4_TCP_UDP VCAP IS2 entries net: dsa: felix: fix some key offsets for IP4_TCP_UDP VCAP IS2 entries inet_diag: validate INET_DIAG_REQ_PROTOCOL attribute net: bridge: br_vlan_get_pvid_rcu() should dereference the VLAN group under RCU net: Update MAINTAINERS for MediaTek switch driver net/mlx5e: mlx5e_fec_in_caps() returns a boolean net/mlx5e: kTLS, Avoid kzalloc(GFP_KERNEL) under spinlock net/mlx5e: kTLS, Fix leak on resync error flow net/mlx5e: kTLS, Add missing dma_unmap in RX resync net/mlx5e: kTLS, Fix napi sync and possible use-after-free net/mlx5e: TLS, Do not expose FPGA TLS counter if not supported net/mlx5e: Fix using wrong stats_grps in mlx5e_update_ndo_stats() net/mlx5e: Fix multicast counter not up-to-date in "ip -s" net/mlx5e: Fix endianness when calculating pedit mask first bit net/mlx5e: Enable adding peer miss rules only if merged eswitch is supported net/mlx5e: CT: Fix freeing ct_label mapping net/mlx5e: Fix memory leak of tunnel info when rule under multipath not ready net/mlx5e: Use synchronize_rcu to sync with NAPI net/mlx5e: Use RCU to protect rq->xdp_prog ...
2020-09-23Merge tag 'io_uring-5.9-2020-09-22' of git://git.kernel.dk/linux-blockLinus Torvalds1-2/+2
Pull io_uring fixes from Jens Axboe: "A few fixes - most of them regression fixes from this cycle, but also a few stable heading fixes, and a build fix for the included demo tool since some systems now actually have gettid() available" * tag 'io_uring-5.9-2020-09-22' of git://git.kernel.dk/linux-block: io_uring: fix openat/openat2 unified prep handling io_uring: mark statx/files_update/epoll_ctl as non-SQPOLL tools/io_uring: fix compile breakage io_uring: don't use retry based buffered reads for non-async bdev io_uring: don't re-setup vecs/iter in io_resumit_prep() is already there io_uring: don't run task work on an exiting task io_uring: drop 'ctx' ref on task work cancelation io_uring: grab any needed state during defer prep
2020-09-22tools/bootconfig: Add testcase for tailing spaceMasami Hiramatsu1-0/+13
Add testcases for removing/keeping tailing space in the value. Link: https://lkml.kernel.org/r/160068151151.1088739.3469541807296024227.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-22tools/bootconfig: Add testcases for repeated key with braceMasami Hiramatsu1-0/+12
Add a testcase for repeated key with brace parsing issue. Link: https://lkml.kernel.org/r/160068150176.1088739.409481347784771987.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-21libbpf: Fix native endian assumption when parsing BTFTony Ambardar1-0/+6
Code in btf__parse_raw() fails to detect raw BTF of non-native endianness and assumes it must be ELF data, which then fails to parse as ELF and yields a misleading error message: root:/# bpftool btf dump file /sys/kernel/btf/vmlinux libbpf: failed to get EHDR from /sys/kernel/btf/vmlinux For example, this could occur after cross-compiling a BTF-enabled kernel for a target with non-native endianness, which is currently unsupported. Check for correct endianness and emit a clearer error message: root:/# bpftool btf dump file /sys/kernel/btf/vmlinux libbpf: non-native BTF endianness is not supported Fixes: 94a1fedd63ed ("libbpf: Add btf__parse_raw() and generic btf__parse() APIs") Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/90f81508ecc57bc0da318e0fe0f45cfe49b17ea7.1600417359.git.Tony.Ambardar@gmail.com
2020-09-21objtool: Ignore unreachable trap after call to noreturn functionsIlie Halip1-3/+7
With CONFIG_UBSAN_TRAP enabled, the compiler may insert a trap instruction after a call to a noreturn function. In this case, objtool warns that the UD2 instruction is unreachable. This is a behavior seen with Clang, from the oldest version capable of building the mainline x64_64 kernel (9.0), to the latest experimental version (12.0). Objtool silences similar warnings (trap after dead end instructions), so so expand that check to include dead end functions. Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Rong Chen <rong.a.chen@intel.com> Cc: Marco Elver <elver@google.com> Cc: Philip Li <philip.li@intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: kasan-dev@googlegroups.com Cc: x86@kernel.org Cc: clang-built-linux@googlegroups.com BugLink: https://github.com/ClangBuiltLinux/linux/issues/1148 Link: https://lore.kernel.org/lkml/CAKwvOdmptEpi8fiOyWUo=AiZJiX+Z+VHJOM2buLPrWsMTwLnyw@mail.gmail.com Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Ilie Halip <ilie.halip@gmail.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2020-09-21objtool: Handle calling non-function symbols in other sectionsJulien Thierry1-5/+14
Relocation for a call destination could point to a symbol that has type STT_NOTYPE. Lookup such a symbol when no function is available. Signed-off-by: Julien Thierry <jthierry@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2020-09-21tools/io_uring: fix compile breakageDouglas Gilbert1-2/+2
It would seem none of the kernel continuous integration does this: $ cd tools/io_uring $ make Otherwise it may have noticed: cc -Wall -Wextra -g -D_GNU_SOURCE -c -o io_uring-bench.o io_uring-bench.c io_uring-bench.c:133:12: error: static declaration of ‘gettid’ follows non-static declaration 133 | static int gettid(void) | ^~~~~~ In file included from /usr/include/unistd.h:1170, from io_uring-bench.c:27: /usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note: previous declaration of ‘gettid’ was here 34 | extern __pid_t gettid (void) __THROW; | ^~~~~~ make: *** [<builtin>: io_uring-bench.o] Error 1 The problem on Ubuntu 20.04 (with lk 5.9.0-rc5) is that unistd.h already defines gettid(). So prefix the local definition with "lk_". Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-21Merge tag 'objtool_urgent_for_v5.9_rc6' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool fix from Borislav Petkov: "Fix noreturn detection for ignored sibling functions (Josh Poimboeuf)" * tag 'objtool_urgent_for_v5.9_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool: Fix noreturn detection for ignored functions
2020-09-19selftests/vm: fix display of page size in map_hugetlbChristophe Leroy1-1/+1
The displayed size is in bytes while the text says it is in kB. Shift it by 10 to really display kBytes. Fixes: fa7b9a805c79 ("tools/selftest/vm: allow choosing mem size and page size in map_hugetlb") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@vger.kernel.org> Link: https://lkml.kernel.org/r/e27481224564a93d14106e750de31189deaa8bc8.1598861977.git.christophe.leroy@csgroup.eu Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-09-19selftests/seccomp: powerpc: Fix seccomp return value testingKees Cook1-0/+15
On powerpc, the errno is not inverted, and depends on ccr.so being set. Add this to a powerpc definition of SYSCALL_RET_SET(). Co-developed-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Link: https://lore.kernel.org/linux-kselftest/20200911181012.171027-1-cascardo@canonical.com/ Fixes: 5d83c2b37d43 ("selftests/seccomp: Add powerpc support") Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-13-keescook@chromium.org Reviewed-by: Michael Ellerman <mpe@ellerman.id.au>
2020-09-19selftests/seccomp: Remove SYSCALL_NUM_RET_SHARE_REG in favor of SYSCALL_RET_SETKees Cook1-10/+23
Instead of special-casing the specific case of shared registers, create a default SYSCALL_RET_SET() macro (mirroring SYSCALL_NUM_SET()), that writes to the SYSCALL_RET register. For architectures that can't set the return value (for whatever reason), they can define SYSCALL_RET_SET() without an associated SYSCALL_RET() macro. This also paves the way for architectures that need to do special things to set the return value (e.g. powerpc). Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-12-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Avoid redundant register flushesKees Cook1-2/+4
When none of the registers have changed, don't flush them back. This can happen if the architecture uses a non-register way to change the syscall (e.g. arm64) , and a return value hasn't been written. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-11-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Convert REGSET calls into ARCH_GETREG/ARCH_SETREGKees Cook1-27/+15
Consolidate the REGSET logic into the new ARCH_GETREG() and ARCH_SETREG() macros, avoiding more #ifdef code in function bodies. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-10-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Convert HAVE_GETREG into ARCH_GETREG/ARCH_SETREGKees Cook1-12/+15
Instead of special-casing the get/set-registers routines, move the HAVE_GETREG logic into the new ARCH_GETREG() and ARCH_SETREG() macros. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-9-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Remove syscall setting #ifdefsKees Cook1-13/+3
With all architectures now using the common SYSCALL_NUM_SET() macro, the arch-specific #ifdef can be removed from change_syscall() itself. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-8-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: mips: Remove O32-specific macroKees Cook1-6/+12
Instead of having the mips O32 macro special-cased, pull the logic into the SYSCALL_NUM() macro. Additionally include the ABI headers, since these appear to have been missing, leaving __NR_O32_Linux undefined. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-7-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: arm64: Define SYSCALL_NUM_SET macroKees Cook1-14/+13
Remove the arm64 special-case in change_syscall(). Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-6-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: arm: Define SYSCALL_NUM_SET macroKees Cook1-10/+6
Remove the arm special-case in change_syscall(). Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-5-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: mips: Define SYSCALL_NUM_SET macroKees Cook1-8/+9
Remove the mips special-case in change_syscall(). Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-4-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Provide generic syscall setting macroKees Cook1-2/+13
In order to avoid "#ifdef"s in the main function bodies, create a new macro, SYSCALL_NUM_SET(), where arch-specific logic can live. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-3-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Refactor arch register macros to avoid xtensa special caseKees Cook1-50/+47
To avoid an xtensa special-case, refactor all arch register macros to take the register variable instead of depending on the macro expanding as a struct member name. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-2-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19selftests/seccomp: Use __NR_mknodat instead of __NR_mknodKees Cook1-1/+1
The __NR_mknod syscall doesn't exist on arm64 (only __NR_mknodat). Switch to the modern syscall. Fixes: ad5682184a81 ("selftests/seccomp: Check for EPOLLHUP for user_notif") Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/lkml/20200912110820.597135-16-keescook@chromium.org Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
2020-09-19tools/bpftool: Support passing BPFTOOL_VERSION to makeTony Ambardar1-1/+1
This change facilitates out-of-tree builds, packaging, and versioning for test and debug purposes. Defining BPFTOOL_VERSION allows self-contained builds within the tools tree, since it avoids use of the 'kernelversion' target in the top-level makefile, which would otherwise pull in several other includes from outside the tools tree. Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200917115833.1235518-1-Tony.Ambardar@gmail.com
2020-09-18Merge tag 'powerpc-5.9-5' of ↵Linus Torvalds1-2/+7
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "Some more powerpc fixes for 5.9: - Opt us out of the DEBUG_VM_PGTABLE support for now as it's causing crashes. - Fix a long standing bug in our DMA mask handling that was hidden until recently, and which caused problems with some drivers. - Fix a boot failure on systems with large amounts of RAM, and no hugepage support and using Radix MMU, only seen in the lab. - A few other minor fixes. Thanks to Alexey Kardashevskiy, Aneesh Kumar K.V, Gautham R. Shenoy, Hari Bathini, Ira Weiny, Nick Desaulniers, Shirisha Ganta, Vaibhav Jain, and Vaidyanathan Srinivasan" * tag 'powerpc-5.9-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/papr_scm: Limit the readability of 'perf_stats' sysfs attribute cpuidle: pseries: Fix CEDE latency conversion from tb to us powerpc/dma: Fix dma_map_ops::get_required_mask Revert "powerpc/build: vdso linker warning for orphan sections" powerpc/mm: Remove DEBUG_VM_PGTABLE support on powerpc selftests/powerpc: Skip PROT_SAO test in guests/LPARS powerpc/book3s64/radix: Fix boot failure with large amount of guest memory
2020-09-18objtool: Fix noreturn detection for ignored functionsJosh Poimboeuf1-1/+1
When a function is annotated with STACK_FRAME_NON_STANDARD, objtool doesn't validate its code paths. It also skips sibling call detection within the function. But sibling call detection is actually needed for the case where the ignored function doesn't have any return instructions. Otherwise objtool naively marks the function as implicit static noreturn, which affects the reachability of its callers, resulting in "unreachable instruction" warnings. Fix it by just enabling sibling call detection for ignored functions. The 'insn->ignore' check in add_jump_destinations() is no longer needed after e6da9567959e ("objtool: Don't use ignore flag for fake jumps"). Fixes the following warning: arch/x86/kvm/vmx/vmx.o: warning: objtool: vmx_handle_exit_irqoff()+0x142: unreachable instruction which triggers on an allmodconfig with CONFIG_GCOV_KERNEL unset. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lkml.kernel.org/r/5b1e2536cdbaa5246b60d7791b76130a74082c62.1599751464.git.jpoimboe@redhat.com
2020-09-18objtool: Ignore unreachable fake jumpsJulien Thierry1-0/+3
It is possible for alternative code to unconditionally jump out of the alternative region. In such a case, if a fake jump is added at the end of the alternative instructions, the fake jump will never be reached. Since the fake jump is just a mean to make sure code validation does not go beyond the set of alternatives, reaching it is not a requirement. Signed-off-by: Julien Thierry <jthierry@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
2020-09-18objtool: Remove useless tests before save_reg()Julien Thierry1-4/+2
save_reg already checks that the register being saved does not already have a saved state. Remove redundant checks before processing a register storing operation. Signed-off-by: Julien Thierry <jthierry@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
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