[PATCH V5] ext4: check hash version and filesystem casefolded consistent
From: Lizhi Xu <hidden>
Date: 2024-06-01 11:38:29
Also in:
linux-ext4, linux-fscrypt, lkml, llvm, netfilter-devel, oe-kbuild-all
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
When mounting the ext4 filesystem, if the hash version and casefolded are not consistent, exit the mounting. Reported-by: syzbot+340581ba9dceb7e06fb3@syzkaller.appspotmail.com Signed-off-by: Lizhi Xu <redacted> --- fs/ext4/super.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c682fb927b64..0ad326504c50 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c@@ -5262,6 +5262,11 @@ 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)) { + err = -EINVAL; + goto failed_mount; + } err = ext4_handle_clustersize(sb); if (err)
--
2.43.0