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 23A862941C for ; Wed, 28 Aug 2024 03:31:03 +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=1724815864; cv=none; b=q/njIDLRP2SpyXUzr8Zbx6QuyC0R9C1yTeqxzx1EwJRSK+O9rS9EZwiizPkwJjMkaLSQmR36b4l3stlfFSbUK5zRSmdDxNcJ29bH3CLLKVkUIJ0HgOq/53QtWDVrkwvPKHzqKrpQHXP7xWOgAJ3cRQABEWqvobmwQDN4IpaI5XE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724815864; c=relaxed/simple; bh=rGfTbjB/IrseFEx3IwAHyLUhBJHgnuEKuPFplJBEDm8=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=D3fHZPA4WYaTLRpfPcGg1f0x0Zwp84p/rOB/o/iav3E/ik3GcSM4kLK1EcmXMoCwUFg9NmHVh6hbQwXxxVWSmwpNLPHhO+4Wwdun5DS1cgaPMQUzjRySkZuMgkZYND/DrrvZkEHvPrCbtbPnIHaWZc51jdnmOTsfoGtWQS2sgaA= 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-81f8edd7370so732951939f.1 for ; Tue, 27 Aug 2024 20:31:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724815862; x=1725420662; 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=vu5uJIf/8g8dj3Yf1bX3ohQRMUDAmS7B1nSWGrngtyA=; b=GH0Uuz/0gx1+yThTlwDX45xzAWHpU2X9rWL0Et194ZoXB9J680iKthqO7ooRA0LUPq B25QG4hdz3+p4VQgaeUUa+eg2+p43+uAIuZGjA1HDMU4LbojD5UsF1xaXTXIT2bMRbuZ 3rN8mPrECZ1baBSSEaJFo2iOWsZgky9lVZXkuxEs2GPEOW2XViTqcUvrWLRrQ7/Ltr3S W7dLhemq+NZCpxIyGQIPq0usQDFi+P/bqF1A2o63bAQc/1X5PWPnjoupGAcfOd6b0Qch sRaVN2bq2kwYSNGdTyY1Jzm95pquxpmC1FPKP63MaTLhtzLYmu9ArQvz2vtFqlVjeO+g B2nQ== X-Forwarded-Encrypted: i=1; AJvYcCXjfAyjplLjiapPcBPqQ1zAXNnujExu3O1JBYC3D79ROfdT7dj72SjXrPnas7Whho2tsuR05m0=@vger.kernel.org X-Gm-Message-State: AOJu0YwU5IlYpDFsf4XvkCIM0+7IwOVeAuRZ8LLuhpUxX1TzvucTFYuv IGGSUa4/adHMkouAUTkQ/7PujxrlWDnjXJ4fiwXa+EJws3snlY9Ettn35chvM7H9om3h3sOMuAb MHzFSdIZVIBWpSTZ2aNl2PtG0g9n3sBwDw1YQjRoQD9MQznXL4v5H1dA= X-Google-Smtp-Source: AGHT+IEq8u5/q/T/KHaia+Jqn7A0HsIJt8R9RZERwYw9F9VvKOGMfK5bKs62RG9i16fQQ3jpz+ESgjyw7fdzdoTzuweYCtivkz/x Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:7306:b0:4bd:4861:d7f8 with SMTP id 8926c6da1cb9f-4cec4f922cbmr24918173.4.1724815862301; Tue, 27 Aug 2024 20:31:02 -0700 (PDT) Date: Tue, 27 Aug 2024 20:31:02 -0700 In-Reply-To: <00000000000041df050616f6ba4e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c69eb60620b5fc4b@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in __mmap_lock_do_trace_start_locking From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, 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, longman@redhat.com, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, netdev@vger.kernel.org, penguin-kernel@I-love.SAKURA.ne.jp, penguin-kernel@i-love.sakura.ne.jp, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" syzbot suspects this issue was fixed by commit: commit 7d6be67cfdd4a53cea7147313ca13c531e3a470f Author: Tetsuo Handa Date: Fri Jun 21 01:08:41 2024 +0000 mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1412f697980000 start commit: 36534d3c5453 tcp: use signed arithmetic in tcp_rtx_probe0_.. git tree: bpf 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 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer For information about bisection process see: https://goo.gl/tpsmEJ#bisection