From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) (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 CAE921DFE3 for ; Mon, 19 Aug 2024 04:40:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724042404; cv=none; b=JGv1TV9QSW7JXiFaH0LlLPPMgU6/5mNEAKk8U5dk+G7yS0r80VlIKtuS1yUz4k3U1MCG0+8lFtZAHci3WSL5+Es2JqOUFMtlk563EweRDZe7ScIGnmG5i7u07DAO07jH8lsp3zZujhwLbX3hteknK+zsPOaF0GH2halT2suZluY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724042404; c=relaxed/simple; bh=ndPGcz+uTi/bIYAnyjXxTlLhFjz2KeP5UQ4eUxYbKxE=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=MKZJQqiaibs/ASYH7Gufnb+yxftNzgeIJ0dpqDY7kdJiVHX72cyDqOtTnLY9QhflaHZuRb84cEiPwQIncQoKUcGCfBEretIr4NjFURjPqjTWglT3U1ut159oPJi7O3sAZ+UAvo4Vid0P31yn3MfTPah7fHa8lBauyI+rh+rYlLc= 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=209.85.166.69 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-f69.google.com with SMTP id ca18e2360f4ac-8223aed78e2so401689539f.0 for ; Sun, 18 Aug 2024 21:40:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724042402; x=1724647202; 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=4QxjT7FBtIf+YOOl5Ydo57Y1HRHDgzWdhn/AVlpRKbU=; b=E0pn8OE6szRQs37uXdLc9Sg1adYR7JSsn1P+AVLP5+MiBI19gn6BGf443uUpqiwEIn sV6//wehNk317H4nM0u1pIXP4Ja265/tfUB9piX9j50N1NYEwH9sZhmuW4YNxtwdGK0N M1CuT7cV5g0t9DbIdvrF4acz1yZTnAQk8xXSt6ySdSrmXqxL4ERQuevdLsBgFTFckNkA qgumMZ/c09ZppZYLwZMTSu1ExTN0i5RcugrNci8G1vYUfW0UUBEItfuyv9Ov3Esv1Amx SYtONn+dJkywyFl4jL0BfNfn+5RC8S0L3dP15fWcjip/ZZN9+R7imkODRkrGdV+z/599 g/Bw== X-Forwarded-Encrypted: i=1; AJvYcCWW3LzjApV0tnNp0JjzGl5bCwfK8bNaUK1tr1NhnW0c5VJJhhr5ohlJVnbrLzhY4oH0BNzIGEQ3ogc1WJDdZkeTn+NwSJb5fQ== X-Gm-Message-State: AOJu0YxXM9A6ShyvBHw0fp9jBgUo17AxhopyfQpB64dKsbDvUVAKlNAS lPvgApG2zWVjSmhHlWVIyKXrPX+KH0/lw1gzAuJkx3uwKNYgkDABCCwnEUrcMGJqwIJQx80lI/u XjtArrXyLGnLbcL+4pxpdLDI6zpYhZvnjyvfaACpC1rFkULzLFhf1c1w= X-Google-Smtp-Source: AGHT+IH316qYQj7K/SEBVPvVeG35zflMK2F/Sc4nwXd5p9/IyQ5MeXxoQPgP4Q0j6l2BAJ0YCA/7X4FcoFqLlYh6md2L53cvBiuo Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:370f:b0:4b9:e5b4:67fd with SMTP id 8926c6da1cb9f-4cce15cdbd5mr504210173.1.1724042401927; Sun, 18 Aug 2024 21:40:01 -0700 (PDT) Date: Sun, 18 Aug 2024 21:40:01 -0700 In-Reply-To: <0000000000002be09b061c483ea1@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f1e97e062001e6b2@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in __mmap_lock_do_trace_released From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, bpf@vger.kernel.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, nsaenz@amazon.com, nsaenzju@redhat.com, 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=12d48893980000 start commit: a12978712d90 selftests/bpf: Move ARRAY_SIZE to bpf_misc.h git tree: bpf-next kernel config: https://syzkaller.appspot.com/x/.config?x=736daf12bd72e034 dashboard link: https://syzkaller.appspot.com/bug?extid=16b6ab88e66b34d09014 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=125718be980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14528876980000 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