block nbd3: NBD_DISCONNECT
general protection fault, probably for non-canonical address 0xdffffc0000000027: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000138-0x000000000000013f]
CPU: 1 PID: 13148 Comm: systemd-udevd Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xcf0/0x5230 kernel/locking/lockdep.c:4772
Code: 36 0e 41 bf 01 00 00 00 0f 86 8c 00 00 00 89 05 66 4f 36 0e e9 81 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 2f 00 00 49 81 3e c0 53 3b 8f 0f 84 da f3 ff
RSP: 0018:ffffc90001caf920 EFLAGS: 00010016
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000027 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1b8dc42 R11: 0000000000000000 R12: ffff888013738000
R13: 0000000000000000 R14: 0000000000000138 R15: 0000000000000000
FS:  00007fcf5550d8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000240 CR3: 0000000028063000 CR4: 0000000000350ee0
Call Trace:
 lock_acquire kernel/locking/lockdep.c:5512 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
 flush_workqueue+0x110/0x13e0 kernel/workqueue.c:2786
 nbd_disconnect_and_put+0x94/0x120 drivers/block/nbd.c:1983
 nbd_release+0x165/0x1a0 drivers/block/nbd.c:1504
 __blkdev_put+0x54e/0x800 fs/block_dev.c:1585
 blkdev_put+0x92/0x580 fs/block_dev.c:1638
 blkdev_close+0x8c/0xb0 fs/block_dev.c:1646
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:161
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x272/0x280 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fcf54653270
Code: 73 01 c3 48 8b 0d 38 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c1 20 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24
RSP: 002b:00007ffdb2ff9a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fcf54653270
RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007fcf5550d710 R08: 000000000000004a R09: 0000000000000008
R10: 000055ed417e9e08 R11: 0000000000000246 R12: 0000000000000000
R13: 000055ed417e6920 R14: 0000000000000003 R15: 000000000000000e
Modules linked in:
---[ end trace 214ac5b00f94a7bf ]---
RIP: 0010:__lock_acquire+0xcf0/0x5230 kernel/locking/lockdep.c:4772
Code: 36 0e 41 bf 01 00 00 00 0f 86 8c 00 00 00 89 05 66 4f 36 0e e9 81 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 2f 00 00 49 81 3e c0 53 3b 8f 0f 84 da f3 ff
RSP: 0018:ffffc90001caf920 EFLAGS: 00010016
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000027 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1b8dc42 R11: 0000000000000000 R12: ffff888013738000
R13: 0000000000000000 R14: 0000000000000138 R15: 0000000000000000
FS:  00007fcf5550d8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000240 CR3: 0000000028063000 CR4: 0000000000350ee0