INFO: task syz-executor.5:13486 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25432 pid:13486 ppid: 8427 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:178
__loop_clr_fd+0x1c6/0x9b0 drivers/block/loop.c:1122
loop_clr_fd drivers/block/loop.c:1237 [inline]
lo_ioctl+0x107b/0x1f40 drivers/block/loop.c:1562
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6be524b8a7
RSP: 002b:00007f6be27c0fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f6be524b8a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 00007f6be27c16bc R08: 00007f6be27c1040 R09: 00000000200002c0
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007f6be27c1000 R15: 00000000200000c0
Showing all locks held in the system:
3 locks held by kworker/1:0/20:
#0: ffff8880b9b395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478
#1: ffff8880b9b27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x46c/0x780 kernel/sched/psi.c:871
#2: ffff88807c2d8490 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x56/0xaf0 drivers/net/netdevsim/dev.c:838
1 lock held by khungtaskd/27:
#0: ffffffff8cb1dc00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by systemd-udevd/12532:
#0: ffff88801ae97118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0xb80 block/bdev.c:819
#1: ffff88801ae92b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x68/0x100 drivers/block/loop.c:1733
1 lock held by syz-executor.5/13486:
#0: ffff88801ae92b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x6d/0x9b0 drivers/block/loop.c:1106
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2966 Comm: systemd-journal Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_acquire+0x239/0x4d0 kernel/locking/lockdep.c:5641
Code: 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 4b c7 04 2f 00 00 00 00 43 c7 44 2f 09 00 00 00 00 43 c7 44 2f 11 00 00 00 00 <66> 43 c7 44 2f 15 00 00 43 c6 44 2f 17 00 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc90000007920 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000000f34 RCX: ffff88807afcc458
RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000000
RBP: ffffc90000007a68 R08: dffffc0000000000 R09: fffffbfff1ff33f8
R10: fffffbfff1ff33f8 R11: 0000000000000000 R12: 0000000000000046
R13: 1ffff92000000f2c R14: ffffc900000079a0 R15: dffffc0000000000
FS: 00007f582b3658c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f582882b008 CR3: 000000001de75000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
skb_dequeue+0x29/0x140 net/core/skbuff.c:3214
mrp_queue_xmit net/802/mrp.c:363 [inline]
mrp_join_timer+0x405/0x820 net/802/mrp.c:608
call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x71a/0x910 kernel/time/timer.c:1734
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:kasan_get_free_meta+0x7/0x20 mm/kasan/common.c:244
Code: 00 66 90 48 63 8f bc 00 00 00 48 8d 04 0e 48 85 c9 48 0f 44 c1 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 63 8f c0 00 00 00 <48> 8d 14 0e 31 c0 48 81 f9 ff ff ff 7f 48 0f 45 c2 c3 0f 1f 80 00
RSP: 0018:ffffc90001a7fd20 EFLAGS: 00000246
RAX: ffffed1004471200 RBX: ffff888022389000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888022389000 RDI: ffff888140006140
RBP: 0000000000000100 R08: dffffc0000000000 R09: ffffed1004471200
R10: fffffbfff21cb1c9 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff81cf6205 R14: ffff888140006140 R15: 0000000000000001
kasan_set_free_info+0x9/0x40 mm/kasan/generic.c:366
____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0x95/0x190 mm/slub.c:3529
do_faccessat+0x798/0x940 fs/open.c:462
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f582a6209c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc3fbbf518 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffc3fbc2540 RCX: 00007f582a6209c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055fb185819a3
RBP: 00007ffc3fbbf660 R08: 000055fb185773e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 000055fb196e28a0 R15: 00007ffc3fbbfb50
----------------
Code disassembly (best guess):
0: 00 02 add %al,(%rdx)
2: 00 00 add %al,(%rax)
4: 74 01 je 0x7
6: fb sti
7: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp)
e: e0 45
10: 4b c7 04 2f 00 00 00 movq $0x0,(%r15,%r13,1)
17: 00
18: 43 c7 44 2f 09 00 00 movl $0x0,0x9(%r15,%r13,1)
1f: 00 00
21: 43 c7 44 2f 11 00 00 movl $0x0,0x11(%r15,%r13,1)
28: 00 00
* 2a: 66 43 c7 44 2f 15 00 movw $0x0,0x15(%r15,%r13,1) <-- trapping instruction
31: 00
32: 43 c6 44 2f 17 00 movb $0x0,0x17(%r15,%r13,1)
38: 65 gs
39: 48 rex.W
3a: 8b .byte 0x8b
3b: 04 25 add $0x25,%al
3d: 28 00 sub %al,(%rax)