diff options
author | Chao Yu <yuchao0@huawei.com> | 2018-09-06 15:34:12 +0300 |
---|---|---|
committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-09-12 03:09:32 +0300 |
commit | 042be0f849e5fc24116d0afecfaf926eed5cac63 (patch) | |
tree | 0598e29d7894a8ad9f28c19b0f46620405865fd6 /fs/f2fs/super.c | |
parent | 4a70e255449c9a13eed7a6eeecc85a1ea63cef76 (diff) | |
download | linux-042be0f849e5fc24116d0afecfaf926eed5cac63.tar.xz |
f2fs: fix to do sanity check with current segment number
https://bugzilla.kernel.org/show_bug.cgi?id=200219
Reproduction way:
- mount image
- run poc code
- umount image
F2FS-fs (loop1): Bitmap was wrongly set, blk:15364
------------[ cut here ]------------
kernel BUG at /home/yuchao/git/devf2fs/segment.c:2061!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 2 PID: 17686 Comm: umount Tainted: G W O 4.18.0-rc2+ #39
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
EIP: update_sit_entry+0x459/0x4e0 [f2fs]
Code: e8 1c b5 fd ff 0f 0b 0f 0b 8b 45 e4 c7 44 24 08 9c 7a 6c f8 c7 44 24 04 bc 4a 6c f8 89 44 24 0c 8b 06 89 04 24 e8 f7 b4 fd ff <0f> 0b 8b 45 e4 0f b6 d2 89 54 24 10 c7 44 24 08 60 7a 6c f8 c7 44
EAX: 00000032 EBX: 000000f8 ECX: 00000002 EDX: 00000001
ESI: d7177000 EDI: f520fe68 EBP: d6477c6c ESP: d6477c34
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010282
CR0: 80050033 CR2: b7fbe000 CR3: 2a99b3c0 CR4: 000406f0
Call Trace:
f2fs_allocate_data_block+0x124/0x580 [f2fs]
do_write_page+0x78/0x150 [f2fs]
f2fs_do_write_node_page+0x25/0xa0 [f2fs]
__write_node_page+0x2bf/0x550 [f2fs]
f2fs_sync_node_pages+0x60e/0x6d0 [f2fs]
? sync_inode_metadata+0x2f/0x40
? f2fs_write_checkpoint+0x28f/0x7d0 [f2fs]
? up_write+0x1e/0x80
f2fs_write_checkpoint+0x2a9/0x7d0 [f2fs]
? mark_held_locks+0x5d/0x80
? _raw_spin_unlock_irq+0x27/0x50
kill_f2fs_super+0x68/0x90 [f2fs]
deactivate_locked_super+0x3d/0x70
deactivate_super+0x40/0x60
cleanup_mnt+0x39/0x70
__cleanup_mnt+0x10/0x20
task_work_run+0x81/0xa0
exit_to_usermode_loop+0x59/0xa7
do_fast_syscall_32+0x1f5/0x22c
entry_SYSENTER_32+0x53/0x86
EIP: 0xb7f95c51
Code: c1 1e f7 ff ff 89 e5 8b 55 08 85 d2 8b 81 64 cd ff ff 74 02 89 02 5d c3 8b 0c 24 c3 8b 1c 24 c3 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
EAX: 00000000 EBX: 0871ab90 ECX: bfb2cd00 EDX: 00000000
ESI: 00000000 EDI: 0871ab90 EBP: 0871ab90 ESP: bfb2cd7c
DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
Modules linked in: f2fs(O) crc32_generic bnep rfcomm bluetooth ecdh_generic snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq pcbc joydev aesni_intel snd_seq_device aes_i586 snd_timer crypto_simd snd cryptd soundcore mac_hid serio_raw video i2c_piix4 parport_pc ppdev lp parport hid_generic psmouse usbhid hid e1000 [last unloaded: f2fs]
---[ end trace d423f83982cfcdc5 ]---
The reason is, different log headers using the same segment, once
one log's next block address is used by another log, it will cause
panic as above.
Main area: 24 segs, 24 secs 24 zones
- COLD data: 0, 0, 0
- WARM data: 1, 1, 1
- HOT data: 20, 20, 20
- Dir dnode: 22, 22, 22
- File dnode: 22, 22, 22
- Indir nodes: 21, 21, 21
So this patch adds sanity check to detect such condition to avoid
this issue.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/super.c')
-rw-r--r-- | fs/f2fs/super.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index b2acb7f751f1..32402f0d9d40 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2325,7 +2325,7 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) unsigned int segment_count_main; unsigned int cp_pack_start_sum, cp_payload; block_t user_block_count; - int i; + int i, j; total = le32_to_cpu(raw_super->segment_count); fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); @@ -2366,11 +2366,43 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs || le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg) return 1; + for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) { + if (le32_to_cpu(ckpt->cur_node_segno[i]) == + le32_to_cpu(ckpt->cur_node_segno[j])) { + f2fs_msg(sbi->sb, KERN_ERR, + "Node segment (%u, %u) has the same " + "segno: %u", i, j, + le32_to_cpu(ckpt->cur_node_segno[i])); + return 1; + } + } } for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) { if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs || le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg) return 1; + for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) { + if (le32_to_cpu(ckpt->cur_data_segno[i]) == + le32_to_cpu(ckpt->cur_data_segno[j])) { + f2fs_msg(sbi->sb, KERN_ERR, + "Data segment (%u, %u) has the same " + "segno: %u", i, j, + le32_to_cpu(ckpt->cur_data_segno[i])); + return 1; + } + } + } + for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) { + for (j = i; j < NR_CURSEG_DATA_TYPE; j++) { + if (le32_to_cpu(ckpt->cur_node_segno[i]) == + le32_to_cpu(ckpt->cur_data_segno[j])) { + f2fs_msg(sbi->sb, KERN_ERR, + "Data segment (%u) and Data segment (%u)" + " has the same segno: %u", i, j, + le32_to_cpu(ckpt->cur_node_segno[i])); + return 1; + } + } } sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); |