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Message-ID: <20240605012335.44086-1-lizhi.xu@windriver.com>
Date: Wed, 5 Jun 2024 09:23:35 +0800
From: Lizhi Xu <lizhi.xu@...driver.com>
To: <krisman@...e.de>
CC: <adilger.kernel@...ger.ca>, <coreteam@...filter.org>,
<davem@...emloft.net>, <ebiggers@...nel.org>, <fw@...len.de>,
<jaegeuk@...nel.org>, <kadlec@...filter.org>, <kuba@...nel.org>,
<linux-ext4@...r.kernel.org>, <linux-fscrypt@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <lizhi.xu@...driver.com>,
<lkp@...el.com>, <llvm@...ts.linux.dev>, <netdev@...r.kernel.org>,
<netfilter-devel@...r.kernel.org>, <oe-kbuild-all@...ts.linux.dev>,
<pablo@...filter.org>,
<syzbot+340581ba9dceb7e06fb3@...kaller.appspotmail.com>,
<syzkaller-bugs@...glegroups.com>, <tytso@....edu>
Subject: [PATCH V6] fs/ext4: Filesystem without casefold feature cannot be mounted with spihash
When mounting the ext4 filesystem, if the default hash version is set to
DX_HASH_SIPHASH but the casefold feature is not set, exit the mounting.
Reported-by: syzbot+340581ba9dceb7e06fb3@...kaller.appspotmail.com
Signed-off-by: Lizhi Xu <lizhi.xu@...driver.com>
---
fs/ext4/super.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c682fb927b64..d0645af3e66e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3593,6 +3593,14 @@ int ext4_feature_set_ok(struct super_block *sb, int readonly)
"mounted without CONFIG_UNICODE");
return 0;
}
+#else
+ if (EXT4_SB(sb)->s_es->s_def_hash_version == DX_HASH_SIPHASH &&
+ !ext4_has_feature_casefold(sb)) {
+ ext4_msg(sb, KERN_ERR,
+ "Filesystem without casefold feature cannot be "
+ "mounted with spihash");
+ return 0;
+ }
#endif
if (readonly)
--
2.43.0
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