INFO: task syz-executor.1:11719 blocked for more than 143 seconds.
      Not tainted 5.10.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:29280 pid:11719 ppid:  8474 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5078
 schedule+0xcf/0x270 kernel/sched/core.c:5157
 rwsem_down_read_slowpath+0x4ca/0x980 kernel/locking/rwsem.c:992
 __down_read_common kernel/locking/rwsem.c:1213 [inline]
 __down_read kernel/locking/rwsem.c:1222 [inline]
 down_read+0xdf/0x440 kernel/locking/rwsem.c:1355
 iterate_supers+0xdb/0x290 fs/super.c:692
 ksys_sync+0x86/0x150 fs/sync.c:114
 __do_sys_sync+0xa/0x10 fs/sync.c:125
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e229
RSP: 002b:00007fc841ef3c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00000000004cd4bf RCX: 000000000045e229
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000119c028 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00007ffea42f570f R14: 00007fc841ef49c0 R15: 000000000119c034

Showing all locks held in the system:
3 locks held by kworker/u4:1/22:
1 lock held by khungtaskd/1646:
 #0: ffffffff8b3637e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254
1 lock held by in:imklog/8165:
 #0: ffff888013203b70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:949
1 lock held by syz-executor.5/11701:
 #0: ffff88806ee820e0 (&type->s_umount_key#74/1){+.+.}-{3:3}, at: alloc_super+0x201/0xaf0 fs/super.c:229
1 lock held by syz-executor.1/11719:
 #0: ffff88806ee820e0 (&type->s_umount_key#75){.+.+}-{3:3}, at: iterate_supers+0xdb/0x290 fs/super.c:692

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1646 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd43/0xfa0 kernel/hung_task.c:294
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 124 Comm: kworker/u4:3 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy10 ieee80211_iface_work
RIP: 0010:_ieee802_11_parse_elems_crc+0x9cf/0x22c0 net/mac80211/util.c:1158
Code: 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 08 38 d0 7f 08 84 c0 0f 85 58 18 00 00 48 8b 04 24 40 88 a8 b5 01 00 00 e9 78 f9 ff ff <e8> ec ba 1b f9 48 8b 04 24 48 b9 00 00 00 00 00 fc ff df 48 8d 78
RSP: 0018:ffffc90001347380 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000032 RCX: 000000000000002b
RDX: 0000000000000000 RSI: ffff8880116c61c0 RDI: 0000000000000003
RBP: 0000000000000004 R08: ffffffff8a624140 R09: ffffffff8856bcad
R10: 000000000000002b R11: 0000000000000032 R12: 0000000000000006
R13: 0000000000000032 R14: ffff88802af6cc8e R15: ffff88802af6cc8d
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0c6592000 CR3: 0000000014769000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ieee802_11_parse_elems_crc+0x841/0xf00 net/mac80211/util.c:1486
 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2039 [inline]
 ieee80211_rx_mgmt_probe_beacon+0x188/0x16b0 net/mac80211/ibss.c:1612
 ieee80211_ibss_rx_queued_mgmt+0xe3e/0x1870 net/mac80211/ibss.c:1642
 ieee80211_iface_work+0x761/0x9e0 net/mac80211/iface.c:1423
 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296