From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+d9890527385ab9767e03@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [netfs?] WARNING: refcount bug in netfs_put_subrequest
Date: Fri, 14 Feb 2025 19:19:25 +0800 [thread overview]
Message-ID: <20250214111926.2252-1-hdanton@sina.com> (raw)
In-Reply-To: <67aee51d.050a0220.21dd3.002f.GAE@google.com>
On Thu, 13 Feb 2025 22:39:25 -0800
> syzbot found the following issue on:
>
> HEAD commit: 69b54314c975 Merge tag 'kbuild-fixes-v6.14' of git://git.k..
> git tree: upstream
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13aafdf8580000
#syz test upstream master
--- x/fs/netfs/read_collect.c
+++ y/fs/netfs/read_collect.c
@@ -289,6 +289,10 @@ reassess:
/* Remove if completely consumed. */
stream->source = front->source;
spin_lock(&rreq->lock);
+ if (front != stream->front) {
+ spin_unlock(&rreq->lock);
+ goto reassess;
+ }
remove = front;
trace_netfs_sreq(front, netfs_sreq_trace_discard);
--
next prev parent reply other threads:[~2025-02-14 11:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-14 6:39 syzbot
2025-02-14 11:19 ` Hillf Danton [this message]
2025-02-14 11:42 ` syzbot
2025-02-14 23:13 ` Hillf Danton
2025-02-14 23:52 ` syzbot
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