On 04/28, Chao Yu wrote:
As Yanming reported in bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=215895
I have encountered a bug in F2FS file system in kernel v5.17.
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
The root cause is: fuzzed inode has both inline_data flag and encrypted flag, so after it was deleted by rename(), during f2fs_evict_inode(), it will cause inline data conversion due to flags confilction, then page cache will be polluted and trigger panic in clear_inode().
This patch tries to fix the issue by do 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
fs/f2fs/f2fs.h | 7 +++++++ fs/f2fs/inode.c | 3 +-- 2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 27aa93caec06..64c511b498cc 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4173,6 +4173,13 @@ static inline void f2fs_set_encrypted_inode(struct inode *inode) */ static inline bool f2fs_post_read_required(struct inode *inode) {
- /*
* used by sanity_check_inode(), when disk layout fields has not* been synchronized to inmem fields.*/- if (file_is_encrypt(inode) || file_is_verity(inode) ||
F2FS_I(inode)->i_flags & F2FS_COMPR_FL)return true;} diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 83639238a1fe..234b8ed02644 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_has_inline_data(inode) && !f2fs_may_inline_data(inode)) {
BTW, why can't we just check the above on-disk fields here only?
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);-- 2.25.1