From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A97E368D51; Tue, 2 Jun 2026 16:28:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780417727; cv=none; b=QZGbH1WiP58zdVb2h9zvhl74GQtAnSwPoU1gicJ107LJOLyxM53IDEO6sAzSm/5cRVRTPH1OfiJqQqt3HVJCMLnj0MHWGjmmDFiZUb5WoS7g/ZBw97urCe6pD+uVBhwAFSZ5RNMq0dplISPYxLeN6xwZUfv1niNaI7iw6fS8Q7A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780417727; c=relaxed/simple; bh=j3+StrbEE9g63gUTuVFDRRY0pEYFW6hv/SzhYKlQuXg=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=B8edym1gXXyQzZgVoPUAMG/P5ub/p2AH4gG6HofIzmRZaEWkcmCPUyfKaaXT+rJxKkW67uPYjuv31mvOjE6xhYEnbHZvVXwlLI5xTHcZ5o4iNOW57z1D7iimszV21OgakqypfDfQMnd+AdqQMqo3L/ftdcusl2MZz6Xx+gmvB50= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf07.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 94FAE120A17; Tue, 2 Jun 2026 16:28:37 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf07.hostedemail.com (Postfix) with ESMTPA id A135120030; Tue, 2 Jun 2026 16:28:35 +0000 (UTC) Date: Tue, 2 Jun 2026 12:28:29 -0400 From: Steven Rostedt To: syzbot Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [trace?] KASAN: use-after-free Write in ring_buffer_read_page Message-ID: <20260602122829.4a91864f@gandalf.local.home> In-Reply-To: <6a1ede7b.b4221f80.1326c5.0003.GAE@google.com> References: <6a1ede7b.b4221f80.1326c5.0003.GAE@google.com> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: A135120030 X-Stat-Signature: wdpjsg8wnusfk1o55gnfdcsu7kk6ujit X-Rspamd-Server: rspamout07 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX18Y4Hfo22B+artpyL5tz7woxnRjl9UfzQY= X-HE-Tag: 1780417715-662554 X-HE-Meta: U2FsdGVkX1/5TMJOhcsc2WJHCw1gxHmVVUsBbQQYwv9F4FvIggaMwKCt63yz/5LefMHR7UtPgVJ2KqIGF2hSoEbkFTiOjRGtbWp2xayDE7I8uHttpHqO6DWrdYFLs+Gwgeh4OZ/qNX2cn6wCTYjTs2NNDUwLoROCLUC8kfX5D4ppWnpiYflgzaprrPPsp2AKZIYxSSHAWpR2BYyq/fjcZmoFGMEJ93iYfwAz81hfijEe76bMeFVFLCitF4Lx5E/LqZSmynUGEADn6GZiNBkfadUkZVuUI5q2TngCyM08JZYg3GiVU4OYQ//x2mRi+UZXP4WoiashQ4IwogxpeJc80VRQq/rXtTJrk8iQ87KV6GpJsg1raoGc+Xh2PUWpm4mzzjBFjqL0ljNwm0JYmDe+15Q9h+Od7h9/7Cug94NgG1ADrLvhJoyFQGbugp+MZAUw On Tue, 02 Jun 2026 06:45:31 -0700 syzbot wrote: > syzbot found the following issue on: > > HEAD commit: e7ae89a0c97c Linux 7.1-rc5 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=16f06e2e580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=58acee1ac5406016 > dashboard link: https://syzkaller.appspot.com/bug?extid=2dd9d02f60775ce5c1fb > compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 > > Unfortunately, I don't have any reproducer for this issue yet. Looks like the test was doing something really weird to trigger this. Without a reproducer, it's pretty much impossible to find out what happened. Maybe AI could do it? -- Steve