From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 A06F74409 for ; Fri, 25 Oct 2024 02:12:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729822354; cv=none; b=K+3U6RVngmCpV+cq6ShJLKv+bBqOcZ/+xOhJVoXKZ1kKkn/ZJf9mQiQN4ifZDIR2lXG06z6q6i/kY3eFE+A1lus+5uot2MwS2X1Wf5eRA5LVLn6S8i7t5tSrkHkGt513IUozbx5F/su7DrFs+JpR09EaB0ZFpCZSsxc+fddsWhQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729822354; c=relaxed/simple; bh=1aMxInPhgdbQLKj929wl57Juz1874puJLc85vZ41OdI=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=Grei27C9KmOblNXQEq1e6CC9UpBPR35X1QPh50tZrV5X+XJ+gz7h2y1bMLVdbfvCExPaE6QHAsJ+8CJGIZV073F7QmFLbK5gMqUjeB5heXUmLDhyPwK/DcEsalayuVwLEf8JmSYjlSGmQ+Ib8vRqx0yIn/sLRcb5DpdRumLry9g= 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=209.85.166.198 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-il1-f198.google.com with SMTP id e9e14a558f8ab-3a3ba4fcf24so16794095ab.0 for ; Thu, 24 Oct 2024 19:12:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729822352; x=1730427152; 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=T2Oiy5qXfx9l65r4lozq0HbAn1nAorcfgQqKjsjjHp0=; b=wrJcMjWjkGenVPkjl7ARHpJZGuHEiGixim0peUU2ubwLP7o+22eCBhBTsnLv1nOESC Gqj0WEW3DBJrSXcFA+b5L0LlLcTYs1ldQf4C+OUDs5tRSx63M0Gw0Bjhrt6epyR5PeQa Ryi5Rj5mxVjF5wGU8C1rx2kKlQ4xB97QfH98vQqKUp7gDGgTEtrT7Z4750ElUBcrF1dE m9+gReJ7TFal6TdUm+eMmqZ2cAgH+Bk8FGpLmVpBeUA3Z3Hm9aw5CbmLCg0ZkBTTobK6 q+KTDhlFG1iMSQUeezrkqxmNkw0Sg7tEsdSH9QoTDxtH7DSxCU7EJz+7tSUlRQCNJXa+ l3CQ== X-Forwarded-Encrypted: i=1; AJvYcCUwOFUfJKaIQuIz2uCpY+3/q1BMmvnjN7cXzxns+yZiykfQIoqADFV/Bm2q/LPMCv5neQT3O6fQCToD2Yg=@vger.kernel.org X-Gm-Message-State: AOJu0YxnmOCYg3t1pTuZmzYDEjw52vzG8werqHv6eKmM2BTjMC6Zsg1d H+H+YL1kQpbmcCmfkGNL5RM/t3ykr6bS6R6GI/IUhBlY+f/gPIV7dCp5BssMCJgzQ2k82mHCi9k kRoQm+7OWbFHwzXUjYFMUEKHSYDhelBxfhgPZe1JBB5V/MnxBt9mXkTQ= X-Google-Smtp-Source: AGHT+IHqBpPJJCOcW5WSnWSxdL34lrftyAeTP8WsAdMcEov3O+7eNVTJw1iXctMGR+Y7bah7LsSNgWZ6ZLrlr9efeBvVKmckqnlc Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a67:b0:3a0:b384:219b with SMTP id e9e14a558f8ab-3a4d59ff663mr81867485ab.26.1729822351735; Thu, 24 Oct 2024 19:12:31 -0700 (PDT) Date: Thu, 24 Oct 2024 19:12:31 -0700 In-Reply-To: <66f76648.050a0220.46d20.002c.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <671afe8f.050a0220.381c35.0007.GAE@google.com> Subject: Re: [syzbot] [bcachefs?] kernel BUG in bch2_fs_btree_write_buffer_exit From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: c2ee9f594da8 KVM: selftests: Fix build on on non-x86 archi.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10580230580000 kernel config: https://syzkaller.appspot.com/x/.config?x=309bb816d40abc28 dashboard link: https://syzkaller.appspot.com/bug?extid=e4b5080f1e963225063e compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1218165f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d0a8a7980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/679bd327d6c3/disk-c2ee9f59.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/878a4498ae97/vmlinux-c2ee9f59.xz kernel image: https://storage.googleapis.com/syzbot-assets/a01c90b897c0/bzImage-c2ee9f59.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/886e4f0a9bc0/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e4b5080f1e963225063e@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/bcachefs/btree_write_buffer.c:801! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 UID: 0 PID: 5857 Comm: syz-executor596 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:bch2_fs_btree_write_buffer_exit+0x1e2/0x1f0 fs/bcachefs/btree_write_buffer.c:800 Code: 00 4c 89 f7 31 f6 e8 1d 41 da fd 5b 41 5c 41 5d 41 5e 41 5f 5d e9 f9 e1 cb 07 e8 c9 78 70 fd e9 f9 fe ff ff e8 bf 78 70 fd 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90004a77b70 EFLAGS: 00010293 RAX: ffffffff84245f21 RBX: 00000000000ffffe RCX: ffff88806e189e00 RDX: 0000000000000000 RSI: 00000000000ffffe RDI: 00000000000fffff RBP: ffff888067200000 R08: ffffffff84245e03 R09: 1ffff1100ce4965e R10: dffffc0000000000 R11: ffffed100ce4965f R12: dffffc0000000000 R13: ffff888067200000 R14: ffff8880672045d8 R15: ffff8880672046a0 FS: 000055557d532380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557d53b6f8 CR3: 0000000024df8000 CR4: 0000000000350ef0 Call Trace: __bch2_fs_free fs/bcachefs/super.c:566 [inline] bch2_fs_release+0x2fd/0x7d0 fs/bcachefs/super.c:610 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x231/0x480 lib/kobject.c:737 deactivate_locked_super+0xc6/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x251/0x310 kernel/task_work.c:239 ptrace_notify+0x2d2/0x380 kernel/signal.c:2403 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe5ea8b56c7 Code: 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffdef8fdfc8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe5ea8b56c7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdef8fe080 RBP: 00007ffdef8fe080 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffdef8ff0f0 R13: 000055557d5336c0 R14: 00007ffdef8ff0e8 R15: 431bde82d7b634db Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_fs_btree_write_buffer_exit+0x1e2/0x1f0 fs/bcachefs/btree_write_buffer.c:800 Code: 00 4c 89 f7 31 f6 e8 1d 41 da fd 5b 41 5c 41 5d 41 5e 41 5f 5d e9 f9 e1 cb 07 e8 c9 78 70 fd e9 f9 fe ff ff e8 bf 78 70 fd 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90004a77b70 EFLAGS: 00010293 RAX: ffffffff84245f21 RBX: 00000000000ffffe RCX: ffff88806e189e00 RDX: 0000000000000000 RSI: 00000000000ffffe RDI: 00000000000fffff RBP: ffff888067200000 R08: ffffffff84245e03 R09: 1ffff1100ce4965e R10: dffffc0000000000 R11: ffffed100ce4965f R12: dffffc0000000000 R13: ffff888067200000 R14: ffff8880672045d8 R15: ffff8880672046a0 FS: 000055557d532380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557d53b6f8 CR3: 0000000024df8000 CR4: 0000000000350ef0 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.