From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo2-f4.google.com (mail-oo2-f4.google.com [74.125.231.132]) (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 4043D415F06 for ; Thu, 3 Sep 2026 20:59:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.132 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788469181; cv=none; b=IQhBcLCqm+rPzH1ya537RkK9pGX4R/Tdrz78PD0V3YtwFnTikQEWv/bSu9rnzSlaA4oU+KRPFPlVyny+qeSfm16CqE8RagowJxZedHq1sDVz5P0Cl1TGEuosPzLYYpkcKErgOS2hrh+06sl2fDLD9fSv2MO06sFpH/aeRJiOTNg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788469181; c=relaxed/simple; bh=aAuupha4ifkchXwkiAGbYr/HlKsVI+QX2NJQRTuTICg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=bt0usXpPvNyMMW3k+hhKZnmBcGvk3YOybFr4Va4LOn9F/0oohSm6xzx0Cmn+mlMc8oAuBv1+tAfG1XzWy+PODQvIXALpCipzLDM1jbFjzg6mKKSDbYTaIV/TN9cxz1FZDK1bzjI0r9Au8rpuc8QxZ+LvY7+/skkG4+R/+Mgir8U= 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=74.125.231.132 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-oo2-f4.google.com with SMTP id 46e09a7af769-7f4e9ec63a7so52841a34.1 for ; Thu, 03 Sep 2026 13:59:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788469170; x=1789073970; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=XNCoPtsUPtRUB6a23MbDtY9twkb0aPC99TXM6/JTHoA=; b=WlE0+G6dLI1VTSRevkCLQ1gtRNk1NeLiB3cDlJw+d455twM/KiQbSM5cCtjv65pARz wEj39vDlGlAH0w6SyqMZPG6LiArx91Wp35DwCOmSOsQe+4TyqKyhA7CGnX09ekJu4KIu shkfnM82oZpsloNhkVJHlQeWDcdYfvIadSkYXO0o8P5pkaNAQmlw8WKqSGLoYKcagff1 q13z2v5Do8zYMAjc45K5pHNYjuDjzrYgwsrziChaT9lPSrwkIltXtLF91DmEStmirsu6 6mpf8MiPI9uHdEliEPxGyGXidCtmHm6apYv1NhtEAzvuNPb/mSvAYKTP7cels5lOrK+T X8NQ== X-Forwarded-Encrypted: i=1; AKwUvBytMc/893BCtpd27m2aCaT4sm8uGK79koBoLUeCRFXbiITX9043gbM03zc3GxrHexNB/jniM5woOdI+UTA=@vger.kernel.org X-Gm-Message-State: AFuF++nZI0dYw2e40xw0qIXvdqOVt6+OHQhJV+FyFGyyznLT7qDg9Pvi 26bERxxxMyLY249t0ueScJ7GCUVIhxLaeo8425RciMxpfC4v5+BCfM2I919CsDilz84EgLt9mj4 NOLZQ+fcK70pm8BQrggzFhfyPJm+0deAR+YCXoK/0c/0pEdXqahUTaeiY4D0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1890:b0:6b1:464d:4d1d with SMTP id 006d021491bc7-6b6fb8d25aemr1327079eaf.11.1788469170682; Thu, 03 Sep 2026 13:59:30 -0700 (PDT) Date: Thu, 03 Sep 2026 13:59:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a99dfb2.9266084e.bf0d7.027c.GAE@google.com> Subject: [syzbot] [block?] general protection fault in blk_mq_quiesce_queue From: syzbot To: axboe@kernel.dk, linux-block@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: 940de590b839 Merge tag 'hardening-v7.3-rc2' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13df50f9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=85bc5cc2fc7394d9 dashboard link: https://syzkaller.appspot.com/bug?extid=fefa0af09f7891b1800e compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=166a48f9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116a48f9580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-940de590.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f3f674f98efb/vmlinux-940de590.xz kernel image: https://storage.googleapis.com/syzbot-assets/132222426e71/bzImage-940de590.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fefa0af09f7891b1800e@syzkaller.appspotmail.com wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 Oops: general protection fault, probably for non-canonical address 0xdffffc000000001c: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000000e0-0x00000000000000e7] CPU: 1 UID: 0 PID: 1158 Comm: kworker/u33:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: nvme-reset-wq nvme_loop_reset_ctrl_work RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:210 Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 0e 36 53 09 66 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc90002c2fae0 EFLAGS: 00010082 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8bd0370a RDI: dffffc000000001c RBP: 00000000000000e0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff91452c5f R11: 0000000000000001 R12: ffffffff8bd0370a R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888096a67000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f6824da4 CR3: 000000004c4f1000 CR4: 0000000000352ef0 Call Trace: __kasan_check_byte+0x13/0x50 mm/kasan/common.c:573 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire kernel/locking/lockdep.c:5882 [inline] lock_acquire+0x132/0x380 kernel/locking/lockdep.c:5865 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:181 blk_mq_quiesce_queue_nowait block/blk-mq.c:265 [inline] blk_mq_quiesce_queue+0x21/0x1c0 block/blk-mq.c:301 nvme_quiesce_admin_queue+0x6e/0x100 drivers/nvme/host/core.c:5412 nvme_loop_shutdown_ctrl drivers/nvme/target/loop.c:415 [inline] nvme_loop_reset_ctrl_work+0xa2/0x5d0 drivers/nvme/target/loop.c:447 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:210 Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 0e 36 53 09 66 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc90002c2fae0 EFLAGS: 00010082 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8bd0370a RDI: dffffc000000001c RBP: 00000000000000e0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff91452c5f R11: 0000000000000001 R12: ffffffff8bd0370a R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888096a67000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f6824da4 CR3: 000000004c4f1000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 0f 1f 00 nopl (%rax) 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 0f 1f 40 d6 nopl -0x2a(%rax) 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 c1 ef 03 shr $0x3,%rdi 27: 48 01 c7 add %rax,%rdi * 2a: 0f b6 07 movzbl (%rdi),%eax <-- trapping instruction 2d: 3c 07 cmp $0x7,%al 2f: 0f 96 c0 setbe %al 32: e9 0e 36 53 09 jmp 0x9533645 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) --- 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 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. 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