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| author | Chao Yu <chao@kernel.org> | 2022-05-18 20:28:41 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2022-05-18 15:36:11 -0700 |
| commit | 677a82b44ebf263d4f9a0cfbd576a6ade797a07b (patch) | |
| tree | 854b11b7ca8c5483c2be3acc956dde717051a4d2 /fs/f2fs/inode.c | |
| parent | 958ed92922028ec67f504dcdc72bfdfd0f43936a (diff) | |
| download | linux-677a82b44ebf263d4f9a0cfbd576a6ade797a07b.tar.gz linux-677a82b44ebf263d4f9a0cfbd576a6ade797a07b.tar.bz2 linux-677a82b44ebf263d4f9a0cfbd576a6ade797a07b.zip | |
f2fs: fix to do sanity check for inline inode
Yanming reported a kernel bug in Bugzilla kernel [1], which can be
reproduced. The bug message is:
The kernel message is shown below:
kernel BUG at fs/inode.c:611!
Call Trace:
evict+0x282/0x4e0
__dentry_kill+0x2b2/0x4d0
dput+0x2dd/0x720
do_renameat2+0x596/0x970
__x64_sys_rename+0x78/0x90
do_syscall_64+0x3b/0x90
[1] https://bugzilla.kernel.org/show_bug.cgi?id=215895
The bug is due to fuzzed inode has both inline_data and encrypted flags.
During f2fs_evict_inode(), as the inode was deleted by rename(), it
will cause inline data conversion due to conflicting flags. The page
cache will be polluted and the panic will be triggered in clear_inode().
Try fixing the bug by doing more sanity checks for inline data inode in
sanity_check_inode().
Cc: stable@vger.kernel.org
Reported-by: Ming Yan <yanming@tju.edu.cn>
Signed-off-by: Chao Yu <chao.yu@oppo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/inode.c')
| -rw-r--r-- | fs/f2fs/inode.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 2fce8fa0dac8..938961a9084e 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -276,8 +276,7 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page) } } - if (f2fs_has_inline_data(inode) && - (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))) { + if (f2fs_sanity_check_inline_data(inode)) { set_sbi_flag(sbi, SBI_NEED_FSCK); f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix", __func__, inode->i_ino, inode->i_mode); |