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author | Chao Yu <chao@kernel.org> | 2023-11-28 12:25:16 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 01:33:35 +0300 |
commit | 02160112e6d45c2610b049df6eb693d7a2e57b46 (patch) | |
tree | b5d12cd112d7fbe4a3bec2607c946fa6ad0ef466 /fs | |
parent | d1992dd1ba7a9b4353cc2c673233be297c8d5c96 (diff) | |
download | linux-02160112e6d45c2610b049df6eb693d7a2e57b46.tar.xz |
f2fs: fix to avoid dirent corruption
[ Upstream commit 53edb549565f55ccd0bdf43be3d66ce4c2d48b28 ]
As Al reported in link[1]:
f2fs_rename()
...
if (old_dir != new_dir && !whiteout)
f2fs_set_link(old_inode, old_dir_entry,
old_dir_page, new_dir);
else
f2fs_put_page(old_dir_page, 0);
You want correct inumber in the ".." link. And cross-directory
rename does move the source to new parent, even if you'd been asked
to leave a whiteout in the old place.
[1] https://lore.kernel.org/all/20231017055040.GN800259@ZenIV/
With below testcase, it may cause dirent corruption, due to it missed
to call f2fs_set_link() to update ".." link to new directory.
- mkdir -p dir/foo
- renameat2 -w dir/foo bar
[ASSERT] (__chk_dots_dentries:1421) --> Bad inode number[0x4] for '..', parent parent ino is [0x3]
[FSCK] other corrupted bugs [Fail]
Fixes: 7e01e7ad746b ("f2fs: support RENAME_WHITEOUT")
Cc: Jan Kara <jack@suse.cz>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Chao Yu <chao@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/f2fs/namei.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 9e4c38481830..2eb7b0e2b34a 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -979,7 +979,7 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, } if (old_dir_entry) { - if (old_dir != new_dir && !whiteout) + if (old_dir != new_dir) f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); else |