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| author | Chao Yu <chao@kernel.org> | 2025-04-08 20:22:08 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-04-12 17:06:57 +0000 |
| commit | 05872a167c2cab80ef186ef23cc34a6776a1a30c (patch) | |
| tree | f4c319c1ab4c5c6e6ac154f7f366f82af6a877e0 /tools/perf/scripts/python/parallel-perf.py | |
| parent | f2fs: support to disable linear lookup fallback (diff) | |
| download | linux-05872a167c2cab80ef186ef23cc34a6776a1a30c.tar.gz linux-05872a167c2cab80ef186ef23cc34a6776a1a30c.zip | |
f2fs: fix to do sanity check on sbi->total_valid_block_count
syzbot reported a f2fs bug as below:
------------[ cut here ]------------
kernel BUG at fs/f2fs/f2fs.h:2521!
RIP: 0010:dec_valid_block_count+0x3b2/0x3c0 fs/f2fs/f2fs.h:2521
Call Trace:
f2fs_truncate_data_blocks_range+0xc8c/0x11a0 fs/f2fs/file.c:695
truncate_dnode+0x417/0x740 fs/f2fs/node.c:973
truncate_nodes+0x3ec/0xf50 fs/f2fs/node.c:1014
f2fs_truncate_inode_blocks+0x8e3/0x1370 fs/f2fs/node.c:1197
f2fs_do_truncate_blocks+0x840/0x12b0 fs/f2fs/file.c:810
f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:838
f2fs_truncate+0x417/0x720 fs/f2fs/file.c:888
f2fs_setattr+0xc4f/0x12f0 fs/f2fs/file.c:1112
notify_change+0xbca/0xe90 fs/attr.c:552
do_truncate+0x222/0x310 fs/open.c:65
handle_truncate fs/namei.c:3466 [inline]
do_open fs/namei.c:3849 [inline]
path_openat+0x2e4f/0x35d0 fs/namei.c:4004
do_filp_open+0x284/0x4e0 fs/namei.c:4031
do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
do_sys_open fs/open.c:1444 [inline]
__do_sys_creat fs/open.c:1522 [inline]
__se_sys_creat fs/open.c:1516 [inline]
__x64_sys_creat+0x124/0x170 fs/open.c:1516
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
The reason is: in fuzzed image, sbi->total_valid_block_count is
inconsistent w/ mapped blocks indexed by inode, so, we should
not trigger panic for such case, instead, let's print log and
set fsck flag.
Fixes: 39a53e0ce0df ("f2fs: add superblock and major in-memory structure")
Reported-by: syzbot+8b376a77b2f364097fbe@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-f2fs-devel/67f3c0b2.050a0220.396535.0547.GAE@google.com
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/parallel-perf.py')
0 files changed, 0 insertions, 0 deletions