Re: [syzbot] [block?] general protection fault in blk_mq_quiesce_queue

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in nvme_loop_reset_ctrl_work

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1
WARNING: drivers/nvme/target/loop.c:457 at nvme_loop_reset_ctrl_work+0x1d4/0x620 drivers/nvme/target/loop.c:457, CPU#3: kworker/u33:3/62
Modules linked in:
CPU: 3 UID: 0 PID: 62 Comm: kworker/u33:3 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:nvme_loop_reset_ctrl_work+0x1d4/0x620 drivers/nvme/target/loop.c:457
Code: 7c 08 84 d2 0f 85 b2 03 00 00 8b 9b dc f8 ff ff bf 01 00 00 00 83 eb 04 89 de e8 c7 fb 59 fb 83 fb 01 76 09 e8 4d 01 5a fb 90 <0f> 0b 90 e8 44 01 5a fb 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900007dfbd8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888020f72580 RSI: ffffffff86b13ae3 RDI: ffff888020f72580
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 00000000ffffffff R11: 00000000000075fb R12: ffff8880299f83e8
R13: ffff8880299f83ec R14: 0000000000000000 R15: ffff88802886b800
FS:  0000000000000000(0000) GS:ffff888096c67000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7f6e210 CR3: 000000004d58f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 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
 </TASK>


Tested on:

commit:         940de590 Merge tag 'hardening-v7.3-rc2' of git://git.k..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=116438f9580000
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
patch:          https://syzkaller.appspot.com/x/patch.diff?x=100438f9580000