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Message-ID: <0000000000007842d80619a6084a@google.com>
Date: Wed, 29 May 2024 23:32:37 -0700
From: syzbot <syzbot+340581ba9dceb7e06fb3@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [fscrypt?] WARNING in fscrypt_fname_siphash
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Subject: Re: [syzbot] [fscrypt?] WARNING in fscrypt_fname_siphash
Author: lizhi.xu@...driver.com
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 74eca356f6d4
diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c
index deabe29da7fb..c8840cfc01dd 100644
--- a/fs/ext4/hash.c
+++ b/fs/ext4/hash.c
@@ -265,6 +265,10 @@ static int __ext4fs_dirhash(const struct inode *dir, const char *name, int len,
__u64 combined_hash;
if (fscrypt_has_encryption_key(dir)) {
+ if (!IS_CASEFOLDED(dir)) {
+ ext4_warning_inode(dir, "Siphash requires Casefolded file");
+ return -2;
+ }
combined_hash = fscrypt_fname_siphash(dir, &qname);
} else {
ext4_warning_inode(dir, "Siphash requires key");
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