From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 342A0EACD; Sat, 8 Mar 2025 01:12:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741396359; cv=none; b=NJzOn2ERA28RptSX6OY1ssMm+mdfId1mGvipx48Y5K8f3vrtKnfaimxgoE4eKHE88Piy+hkivXlLWMxM530fOzSPGTrT+DRSnXzd84LhwdrFxvX+MkDplUq4W8hrJ70yO79pB950sncZfHT8YtH6zVNM9Uc63R/p/SyWaNjG90Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741396359; c=relaxed/simple; bh=YAUkg8TEJ5yVNr/zf1J0fvVRyBfCp4Kbd9lvTbNtuI4=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=hequYSBcRUnK1bj4UDQvPVdhB4b1+EDYRlUOjjfPRm3FbbAFsV2F0rUTDQrKRJbSVuK8UuN5rGtjTQl2ioJnMSIQEP1uofUu/nsMKdDD1BX5PK6N/GpEBwpDtQqMNF253hj3t/QYAXaFNsnkLGh/b+Yk2QxPSCfBKvdbUY5P548= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5938C4CED1; Sat, 8 Mar 2025 01:12:37 +0000 (UTC) Date: Fri, 7 Mar 2025 20:12:38 -0500 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?] WARNING in tracepoint_add_func (2) Message-ID: <20250307201238.1a3f9f53@gandalf.local.home> In-Reply-To: <67cb890e.050a0220.d8275.022e.GAE@google.com> References: <67cb890e.050a0220.d8275.022e.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-trace-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 On Fri, 07 Mar 2025 16:02:22 -0800 syzbot wrote: > syzbot found the following issue on: > > HEAD commit: 7eb172143d55 Linux 6.14-rc5 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11b9a464580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=bed8205d3b84ef81 > dashboard link: https://syzkaller.appspot.com/bug?extid=161412ccaeff20ce4dde > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. Yeah, because you add random fault injections, you wont hit it, unless you have the right addition of faults. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/06a492964134/disk-7eb17214.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/83adeaa22219/vmlinux-7eb17214.xz > kernel image: https://storage.googleapis.com/syzbot-assets/7386164633ed/bzImage-7eb17214.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+161412ccaeff20ce4dde@syzkaller.appspotmail.com There's a ton of fault injections here, which if happened in a real situation, would mean the system was likely about to crash. Especially since it's failing on 1 page allocations of GFP_KERNEL, which only happens when there's no free memory available. This warning is the least of you worries in such a scenario. -- Steve