From: syzbot <syzbot+b9704899e166798d57c9@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] Re: KASAN: use-after-free Read in ocfs2_search_dirblock()
Date: Tue, 19 Nov 2024 08:28:54 -0800 [thread overview]
Message-ID: <673cbcc6.050a0220.87769.0079.GAE@google.com> (raw)
In-Reply-To: <000000000000e2ff53061fc9dfcf@google.com>
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Subject: Re: KASAN: use-after-free Read in ocfs2_search_dirblock()
Author: dmantipov@yandex.ru
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 158f238aa69d91ad74e535c73f552bd4b025109c
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 213206ebdd58..7a8040a47e82 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -378,7 +378,7 @@ static inline int ocfs2_search_dirblock(struct buffer_head *bh,
/* prevent looping on a bad block */
de_len = le16_to_cpu(de->rec_len);
- if (de_len <= 0) {
+ if (de_len <= 0 || de_len > sizeof(*de)) {
ret = -1;
goto bail;
}
prev parent reply other threads:[~2024-11-19 16:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-16 9:49 [syzbot] [ocfs2?] KASAN: use-after-free Read in ocfs2_search_dirblock syzbot
2024-11-19 16:28 ` syzbot [this message]
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