From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 96619DDD4 for ; Sun, 16 Jun 2024 14:05:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718546705; cv=none; b=EkjjNJLh1FNyJNm4F/mkIeF0rGOPQNPu3T5RpT30/fhgayniqLAtw5IpmqIOQ4Y8Ce2Lic7VSQxdrwTY0pG1kYwI2WI0yAnEtpZpa5208REQbWPlnz2ZzHHxHZ9quHx5tYIRDViO8EME6V/0tP+DmxSc5ikEtHp6JZzjgj9fxgM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718546705; c=relaxed/simple; bh=6io00tG+BXXD/bjavj6Wc0ZSI2uXwoyQQXTJiFre6ec=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=DEVFvP7uDwfR0Y1ML2Hz0O2ekDTwgByCpm1CkEQWKarhvzThonifsSLvW0fz+7iimSvMhBvWaGqV7oaEZIzGLQhjgmS6p5dQjmsQDDDiIx/idwnIPsNvrsQCR6HdnA/xz2dXVg1h0jevNjv+BLWf69L5lrzSaXhstS0tl7j6dCw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f72.google.com with SMTP id ca18e2360f4ac-7eb69c65e9aso424978239f.3 for ; Sun, 16 Jun 2024 07:05:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718546704; x=1719151504; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DLcaaWng2TQ/H+FaOLphi+VM/bKUwUbvtr6FoaGnNrI=; b=r9TDCE8lEv8hosEUOmY0JDsaWssUNu3+yb59XGAteyVN4tn2SVxcpeDkAef3UCl6YX Rtt1uAgJa1akah8TCOMlcIF1kBznm3IgUslNUlSTj/ssqVYBeV4tjNm1vqxZ53zBnQob hC0RAHmVSYLjei20ObGncog0XBZIOssGxnDdNsQZalc3j1ksKvvRuukTaKEotXB32TG2 QLs3EnbXJvjkk3rrr5JDT+un5Eykrryx+86dyrj6PqePZl826Rg2/aMJRS/cq1+E1ntk INP6heKWWqRVH7zJU8mqis6qfz5ENeMba3ZjzhgkwipVSBxSekKQ7UEswwNwqQConlWi atiw== X-Forwarded-Encrypted: i=1; AJvYcCVCENm9Pw6RRkjDaRMWURcSyRz4TlRZbbgb1rmJvZUkNVOgu+8CH9RiaAaYwhHqLCW8y/8fNfv7zgoIxcE287llb1nZ84xcpO/RyvzXG6hC3qm1 X-Gm-Message-State: AOJu0YzQcJJhd9s8XW8vY98hF9ly9LcqT9/69Sn961VTc4Iijx4Vrwbt LMcTc60O6J8NQqIwovTH6CYkNKj8CCZLlhPKvbiJ+aHPevLAjPW/aV+2HK8fMhSSO5qB5V3ZG8z 24FAEM00YSDHVSC9J+WBR0+D1VZDc3kRlOFQXFUIV7+e6GCvM3SbzDnQ= X-Google-Smtp-Source: AGHT+IGHyeFtvlt+ImnEUgnwm5dEInqksvU32QABvMV0/yconOjWp25/ZCqoFaDWtWWVmgcbKMIB0yhITZPgs6UzpCsDR8a/2Hhl Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:150f:b0:7eb:78b4:faff with SMTP id ca18e2360f4ac-7ebeb62c796mr20918739f.3.1718546703860; Sun, 16 Jun 2024 07:05:03 -0700 (PDT) Date: Sun, 16 Jun 2024 07:05:03 -0700 In-Reply-To: <00000000000041df050616f6ba4e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d05580061b025528@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in __mmap_lock_do_trace_start_locking From: syzbot To: akpm@linux-foundation.org, cgroups@vger.kernel.org, hannes@cmpxchg.org, hawk@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, lizefan.x@bytedance.com, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, netdev@vger.kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 21c38a3bd4ee3fb7337d013a638302fb5e5f9dc2 Author: Jesper Dangaard Brouer Date: Wed May 1 14:04:11 2024 +0000 cgroup/rstat: add cgroup_rstat_cpu_lock helpers and tracepoints bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16695261980000 start commit: 36534d3c5453 tcp: use signed arithmetic in tcp_rtx_probe0_.. git tree: bpf final oops: https://syzkaller.appspot.com/x/report.txt?x=15695261980000 console output: https://syzkaller.appspot.com/x/log.txt?x=11695261980000 kernel config: https://syzkaller.appspot.com/x/.config?x=333ebe38d43c42e2 dashboard link: https://syzkaller.appspot.com/bug?extid=6ff90931779bcdfc840c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1585acfa980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17bdb7ee980000 Reported-by: syzbot+6ff90931779bcdfc840c@syzkaller.appspotmail.com Fixes: 21c38a3bd4ee ("cgroup/rstat: add cgroup_rstat_cpu_lock helpers and tracepoints") For information about bisection process see: https://goo.gl/tpsmEJ#bisection