From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (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 7B63513C3CD for ; Thu, 13 Jun 2024 07:41:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718264485; cv=none; b=vFxkVbfKzT+8CVqVwNfBQpq4K6rEbrSNm3iitNnK1MjhJLutzqy90BUEpT+JnKkINYyLBijboK7R5Iwyzcg6ynaCDvTPtQn151CVc5icJ4pmPhFlLmZUhYRrhZiitToAgHVOtyAR70OjAsToxMvi9Bjtbwt+eHvy/FufnZnjay8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718264485; c=relaxed/simple; bh=cL2BgMmHh5xV3N39hCgXXAG2U3xITd4PLsXUnEWUzXc=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=eySXX5rJtpZyGYy3dYTqsmWT1am3Qp9LC8oszfMZw9nyzDQYr6YD+LcI+xKXdDcFMAVVdtMYNv5ouHG4VhpnHBYdg/MVBZRkgvLdmwlKd+a9ayfYyV5mTgSwAvYw1pK/j7M83wYTi5/183G/ArkMW1FFu59gArkhZS4c7vmEhSA= 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=209.85.166.80 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-f80.google.com with SMTP id ca18e2360f4ac-7eb5cbe815dso66907839f.0 for ; Thu, 13 Jun 2024 00:41:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718264482; x=1718869282; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9uZgCpTECVNHB0F5NEpJWmdXZOe3SRCkkR5z2dCIKI4=; b=eIh1DeRXIFdvK/MacoMSZ2o1/HHbnS9elzj2b0YXXvM6atJBfISqLcuVutCnbJBpG1 /uPIUZfGfyVet3LWv94ZPTBN+EnT5/Wjce67LQE33FphrJPJ8+uOIbv4kO463RfkB9IF EVXdI8SoEk1dw64yp+His2GvdxkBPb+HGY4sic9hMUVqCkZe0Lh0gewbjxgwkNPdWzpy H1+H9yR9HUc3XgSBWqViirTO4eVuP9DdTT76OhLureHq2r26LO6+pe/a+JK7ey9orC97 FC7ASCBauJ3cUQ070v0L18+/RBxDMt9HEGkSpXywb6mxKQI3E9YysEzl9bfaZtXxG3I6 3Jtg== X-Forwarded-Encrypted: i=1; AJvYcCWlptK6YBLhno3sn7weY/bon2iiob1YROkoKjvG5t1mc0TZPFRzndWxmn/Q5PTWGDvv3zSriHOmeWt4y/+TqOZu/ZUHpePTr9cvhKMnZq0= X-Gm-Message-State: AOJu0Yy6YRVffE1qywTQ5Ts2mINfYBS84tdKBqSvg8JWk3kiG4uAWPoH Vuf3Ee4TI4qEe0Eb6MLL4ubGkobQDbNTJGYbyLa2JGybKl6r+D+UmvcJrtS8RPS3luEciJxcl4i 6mAgLrWviwdnzPw5hYgG6kMzbRKno+CsjEKXKw7jR3piUOonJAaSRKeA= X-Google-Smtp-Source: AGHT+IGOJwNKfU3uUXM+aL4FPvQoVNmDdQNjqkfYrBs2HOUUQZm4sqZYPJJFLOug9cdHNFORkuKJCG4VcUeRrazoJON/a3E1zQi2 Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8614:b0:4b9:2bc3:46ba with SMTP id 8926c6da1cb9f-4b93ee3ab1cmr231896173.3.1718264482514; Thu, 13 Jun 2024 00:41:22 -0700 (PDT) Date: Thu, 13 Jun 2024 00:41:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001c53f4061ac0a03c@google.com> Subject: [syzbot] [bcachefs?] general protection fault in bch2_fs_btree_key_cache_exit From: syzbot To: bfoster@redhat.com, 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" Hello, syzbot found the following issue on: HEAD commit: 2ccbdf43d5e7 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=169faf7a980000 kernel config: https://syzkaller.appspot.com/x/.config?x=81c0d76ceef02b39 dashboard link: https://syzkaller.appspot.com/bug?extid=a7c01586b9012e998c07 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2ccbdf43.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/13cdb5bfbafa/vmlinux-2ccbdf43.xz kernel image: https://storage.googleapis.com/syzbot-assets/7a14f5d07f81/bzImage-2ccbdf43.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a7c01586b9012e998c07@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc000000001b: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000000d8-0x00000000000000df] CPU: 1 PID: 5228 Comm: syz-executor.3 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__list_add include/linux/list.h:154 [inline] RIP: 0010:list_add include/linux/list.h:169 [inline] RIP: 0010:bch2_fs_btree_key_cache_exit+0x90a/0x1490 fs/bcachefs/btree_key_cache.c:968 Code: 00 fc ff df 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 7f 08 00 00 4c 89 e0 4d 89 66 08 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 <80> 3c 08 00 0f 85 53 08 00 00 49 8d bf e0 00 00 00 4d 89 b7 d8 00 RSP: 0018:ffffc90002f6fc48 EFLAGS: 00010206 RAX: 000000000000001b RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffff88801d384880 RSI: ffffffff83ef4d76 RDI: ffff888012192a48 RBP: ffffe8ffad3699f8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000003 R12: 00000000000000d8 R13: ffffc90002f6fcc0 R14: ffff888012192a40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:0000000056f3a400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000032229000 CR3: 000000004acf4000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bch2_fs_free fs/bcachefs/super.c:554 [inline] bch2_fs_release+0x107/0x870 fs/bcachefs/super.c:605 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1fa/0x5b0 lib/kobject.c:737 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72b7579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffd49be8 EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ffd49c90 RCX: 0000000000000009 RDX: 00000000f740dff4 RSI: 00000000f735e361 RDI: 00000000ffd4ad34 RBP: 00000000ffd49c90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add include/linux/list.h:154 [inline] RIP: 0010:list_add include/linux/list.h:169 [inline] RIP: 0010:bch2_fs_btree_key_cache_exit+0x90a/0x1490 fs/bcachefs/btree_key_cache.c:968 Code: 00 fc ff df 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 7f 08 00 00 4c 89 e0 4d 89 66 08 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 <80> 3c 08 00 0f 85 53 08 00 00 49 8d bf e0 00 00 00 4d 89 b7 d8 00 RSP: 0018:ffffc90002f6fc48 EFLAGS: 00010206 RAX: 000000000000001b RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffff88801d384880 RSI: ffffffff83ef4d76 RDI: ffff888012192a48 RBP: ffffe8ffad3699f8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000003 R12: 00000000000000d8 R13: ffffc90002f6fcc0 R14: ffff888012192a40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:0000000056f3a400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c000b77000 CR3: 000000004acf4000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: f8 clc 4: 48 c1 e8 03 shr $0x3,%rax 8: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) c: 0f 85 7f 08 00 00 jne 0x891 12: 4c 89 e0 mov %r12,%rax 15: 4d 89 66 08 mov %r12,0x8(%r14) 19: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 20: fc ff df 23: 48 c1 e8 03 shr $0x3,%rax * 27: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2b: 0f 85 53 08 00 00 jne 0x884 31: 49 8d bf e0 00 00 00 lea 0xe0(%r15),%rdi 38: 4d rex.WRB 39: 89 .byte 0x89 3a: b7 d8 mov $0xd8,%bh --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup