From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 55330D51C for ; Sat, 18 May 2024 05:23:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716009803; cv=none; b=k5yQi/mWpo1tvPDtGsVF75iTCotHu3U29sz8KO+LQZk4/+sBEl7Niu9XM8PTBbgtLCHeW0Tj4Ih9aE2gwvVNxx4FtNbKcyvxy8JOHCRZv19VnrEedzk/MHNFPSe9R811oxbbybFq9p75/C9ZSiI0/lc/1D6QOzOtjQWIXmd7eHM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716009803; c=relaxed/simple; bh=AIQcw2wZPM2jkR0uml9IhV9m0z3uY/dRPmFHrhLZX58=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=n2gY3K8fR8xfamFFW0CKyUVnTJXTig1CxEBiF9/dR2WOAohgC+3Lt55e5e3q+jCYgSfWa2niHk0DY6rSv7bGq1h5iknhUmy9v4/aUJilYcudHOvbZsKdM/z1u4WfeG1m7qE4U1FL53+S+5HuPbIos2kteDFr268Z7WeI0A8bM1c= 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=209.85.166.79 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-f79.google.com with SMTP id ca18e2360f4ac-7e1d1c7229aso793192239f.0 for ; Fri, 17 May 2024 22:23:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716009801; x=1716614601; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/MrL6pEfonU8pCkuJ3ORJE6oNNScN662RCAj0jCAlto=; b=cxCb406QvMwFl7TGNYyNEkNa/4SyaIjzMq/LdGnZP9WtfawICsTBspGEL+obcGwoBP +OFRcWPHM0fkgAzQeUW8pwQf6MsbPcQBMz9ecvrCI0c84PU3hvzQPwV/L+cwceVjPxob SAXImGxLOBZEYp6VwVJRYcJAH2y8U7H96dthBTUA8kUbeIuLYEo99upb1Gt0CuuNrsau +WHjgKqAn8NnYLQJPAYlC+aGMJkX51kvyxupE7yrEUaa1V1btlnza0HUR/n2/rY+ReCL lGInndJ6eX+XzPIelv48iUyaLcA3YIS9SEtBG3PYdeY70xL7gyRoIOUrR6DxjAvW14oB 9y/g== X-Forwarded-Encrypted: i=1; AJvYcCX4qEvKA6z5iX+W6Z/6WVCYkG+03ddhqvcbMUpVjb9VHRA5wIpFbotEcehm/xJTSUktLJz/rTJXRMbNnTXd712tvch7szfIXlsb5flX X-Gm-Message-State: AOJu0YxR4scSNh1zHS5m27zo2+7s2lxRkrPWzI3nBeZ/wH8AAQwHVIvQ ED+fklg7jTYucoNCeaB6wYMlAygKhlDocMDhFcNxyeibKIfQHGcs5U0Ilh1Lo7Ag2dbg0HgpCpb CKfmDdamfFi7gXMWG43qLhEzJcjkJQrpIqnIXGXO4lqkRqcGqOOvfYYo= X-Google-Smtp-Source: AGHT+IG/gkkkdt2qPSXew6UJVstE0tcqo+Fse0E7P2g0ogpqqmHbm4kmwGoyaaYHhH9Yq0nQCEu3t3UXOqAL7FEty/UA1aJ60InD Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8305:b0:487:100b:9212 with SMTP id 8926c6da1cb9f-48958af8591mr1634520173.3.1716009801501; Fri, 17 May 2024 22:23:21 -0700 (PDT) Date: Fri, 17 May 2024 22:23:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a65f480618b3aad9@google.com> Subject: [syzbot] [ext4?] WARNING: locking bug in ext4_mb_add_groupinfo From: syzbot To: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: a5131c3fdf26 Merge tag 'x86-shstk-2024-05-13' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=152fcf98980000 kernel config: https://syzkaller.appspot.com/x/.config?x=fdb182f40cdd66f7 dashboard link: https://syzkaller.appspot.com/bug?extid=caf3fed221ac23a1398f 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-a5131c3f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6d23116dab9c/vmlinux-a5131c3f.xz kernel image: https://storage.googleapis.com/syzbot-assets/dd8b9de9af4f/bzImage-a5131c3f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+caf3fed221ac23a1398f@syzkaller.appspotmail.com Looking for class "c->lock" with key __key.0, but found a different class "&c->lock" with the same key WARNING: CPU: 3 PID: 5490 at kernel/locking/lockdep.c:932 look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932 Modules linked in: CPU: 3 PID: 5490 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-01768-ga5131c3fdf26 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932 Code: c7 c7 80 bc 0c 8b e8 9c a3 7d f6 90 0f 0b 90 90 90 31 db eb be c6 05 78 f3 b3 04 01 90 48 c7 c7 a0 bf 0c 8b e8 7e a3 7d f6 90 <0f> 0b 90 90 e9 62 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900076bf4d8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffffffff93d7a900 RCX: ffffc90006f69000 RDX: 0000000000040000 RSI: ffffffff81514aa6 RDI: 0000000000000001 RBP: ffffffff9466e9d0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000006b6f6f4c R12: ffffe8ffad57d2c0 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff94656ba0 FS: 0000000000000000(0000) GS:ffff88802c500000(0063) knlGS:00000000f5e47b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73d30c4 CR3: 00000000003a6000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xb1/0x1230 kernel/locking/lockdep.c:1284 __lock_acquire+0x111/0x3b30 kernel/locking/lockdep.c:5014 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ___slab_alloc+0x73b/0x1810 mm/slub.c:3641 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3682 __slab_alloc_node mm/slub.c:3735 [inline] slab_alloc_node mm/slub.c:3908 [inline] kmem_cache_alloc+0x2f3/0x330 mm/slub.c:3925 kmem_cache_zalloc include/linux/slab.h:739 [inline] ext4_mb_add_groupinfo+0x43f/0x1180 fs/ext4/mballoc.c:3343 ext4_mb_init_backend fs/ext4/mballoc.c:3422 [inline] ext4_mb_init+0x1273/0x2530 fs/ext4/mballoc.c:3719 __ext4_fill_super fs/ext4/super.c:5518 [inline] ext4_fill_super+0x6e08/0xaea0 fs/ext4/super.c:5695 get_tree_bdev+0x36f/0x610 fs/super.c:1614 vfs_get_tree+0x8f/0x380 fs/super.c:1779 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e1/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7255579 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:00000000f5e47400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00000000f5e47460 RCX: 00000000200005c0 RDX: 0000000020000100 RSI: 0000000001018e58 RDI: 00000000f5e474a0 RBP: 00000000f5e47460 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- 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