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>
For archival purposes, forwarding an incoming command email to
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com.
***
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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=673cbcc6.050a0220.87769.0079.GAE@google.com \
--to=syzbot+b9704899e166798d57c9@syzkaller.appspotmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.