INFO: task syz.5.1275:15342 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1275      state:D stack:20968 pid:15342 tgid:15340 ppid:8571   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 vfs_setxattr+0x144/0x2f0
 filename_setxattr+0x274/0x600
 path_setxattrat+0x364/0x3a0
 __x64_sys_setxattr+0xbc/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f8138ebe9
RSP: 002b:00007f4f822ad038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f4f815b6090 RCX: 00007f4f8138ebe9
RDX: 0000200000000340 RSI: 0000200000000140 RDI: 0000200000000100
RBP: 00007f4f81411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000700 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f815b6128 R14: 00007f4f815b6090 R15: 00007fffa11afa08
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: kworker/u10:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:kasan_record_aux_stack+0x0/0xd0
Code: 0f 45 c6 48 01 c8 c3 cc cc cc cc cc 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 41 56 53 48 89 fb e8 91 ce ff ff 48 89 c1 48 8b 05 57
RSP: 0018:ffffc900006aed28 EFLAGS: 00000246
RAX: 517c283e07c42200 RBX: ffff88811881a300 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8be33660 RDI: ffff88811881a300
RBP: 0000000000000000 R08: ffffffff8fa38337 R09: 1ffffffff1f47066
R10: dffffc0000000000 R11: fffffbfff1f47067 R12: ffff88811881a308
R13: ffffc900006aefc0 R14: ffff88803f949000 R15: ffff88811881a300
FS:  0000000000000000(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe65450f78 CR3: 0000000028ec8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 kvfree_call_rcu+0xbb/0x410
 cfg80211_update_known_bss+0x634/0x1330
 __cfg80211_bss_update+0x147/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 cfg80211_inform_bss_data+0x1fb/0x3b30
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x746/0x9e0
 ieee80211_ibss_rx_queued_mgmt+0xa36/0x2ae0
 ieee80211_iface_work+0x85f/0x12d0
 cfg80211_wiphy_work+0x2bb/0x470
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
