When mounting the ext4 filesystem, if the hash version and casefolded are not consistent, exit the mounting. Reported-by: syzbot+340581ba9dceb7e06fb3@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Lizhi Xu <lizhi.xu@xxxxxxxxxxxxx> --- fs/ext4/super.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index c682fb927b64..c0036e3922c2 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5262,6 +5262,9 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) goto failed_mount; ext4_hash_info_init(sb); + if (es->s_def_hash_version == DX_HASH_SIPHASH && + !ext4_has_feature_casefold(sb)) + goto failed_mount; err = ext4_handle_clustersize(sb); if (err) -- 2.43.0
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