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ext4: fix uninitialized variable in ext4_inlinedir_to_tree

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[ Upstream commit 8dc9c3da79 ]

Syzbot has found an uninit-value bug in ext4_inlinedir_to_tree

This error happens because ext4_inlinedir_to_tree does not
handle the case when ext4fs_dirhash returns an error

This can be avoided by checking the return value of ext4fs_dirhash
and propagating the error,
similar to how it's done with ext4_htree_store_dirent

Signed-off-by: Xiaxi Shen <shenxiaxi26@gmail.com>
Reported-and-tested-by: syzbot+eaba5abe296837a640c0@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=eaba5abe296837a640c0
Link: https://patch.msgid.link/20240501033017.220000-1-shenxiaxi26@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaxi Shen 2024-04-30 20:30:17 -07:00 committed by Greg Kroah-Hartman
parent 850304152d
commit e7abdad660
1 changed files with 5 additions and 1 deletions
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6
fs/ext4/inline.c
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@ -1411,7 +1411,11 @@ int ext4_inlinedir_to_tree(struct file *dir_file,
hinfo->hash = EXT4_DIRENT_HASH(de); hinfo->hash = EXT4_DIRENT_HASH(de);
hinfo->minor_hash = EXT4_DIRENT_MINOR_HASH(de); hinfo->minor_hash = EXT4_DIRENT_MINOR_HASH(de);
} else { } else {
ext4fs_dirhash(dir, de->name, de->name_len, hinfo); err = ext4fs_dirhash(dir, de->name, de->name_len, hinfo);
if (err) {
ret = err;
goto out;
}
} }
if ((hinfo->hash < start_hash) || if ((hinfo->hash < start_hash) ||
((hinfo->hash == start_hash) && ((hinfo->hash == start_hash) &&