BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
PGD 0 P4D 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 30623 Comm: kworker/1:1 Not tainted 4.19.211-syzkaller #0
EXT4-fs (loop2): Invalid log block size: 8981504
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events cfg80211_destroy_iface_wk
RIP: 0010:test_and_set_bit arch/x86/include/asm/bitops.h:209 [inline]
RIP: 0010:try_to_grab_pending+0xcd/0x6f0 kernel/workqueue.c:1229
Code: 3c 02 00 0f 85 26 05 00 00 4c 89 6d 00 e8 4b 53 29 00 31 ff 44 89 e6 e8 81 2c 24 00 45 84 e4 0f 85 da 01 00 00 e8 43 2b 24 00 <f0> 48 0f ba 2b 00 41 0f 92 c4 31 ff 44 89 e6 e8 5f 2c 24 00 45 84
RSP: 0018:ffff88804997f870 EFLAGS: 00010093
RAX: ffff88804dc26300 RBX: 0000000000000080 RCX: ffffffff813e5a1f
RDX: 0000000000000000 RSI: ffffffff813e5a2d RDI: 0000000000000001
RBP: ffff88804997f8e8 R08: 0000000000400000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000293 R14: dffffc0000000010 R15: ffff88804dc26300
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 00000000a166b000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __cancel_work_timer+0xa6/0x590 kernel/workqueue.c:2972
 rhashtable_free_and_destroy+0x2b/0x970 lib/rhashtable.c:1145
 mesh_table_free net/mac80211/mesh_pathtbl.c:73 [inline]
 mesh_pathtbl_unregister+0x42/0xa0 net/mac80211/mesh_pathtbl.c:825
 ieee80211_teardown_sdata net/mac80211/iface.c:1122 [inline]
 ieee80211_uninit+0x7e/0x90 net/mac80211/iface.c:1127
 rollback_registered_many+0x927/0xe70 net/core/dev.c:8210
 rollback_registered+0xe9/0x1b0 net/core/dev.c:8238
 unregister_netdevice_queue+0x1de/0x3e0 net/core/dev.c:9305
 unregister_netdevice include/linux/netdevice.h:2615 [inline]
 ieee80211_if_remove+0x213/0x390 net/mac80211/iface.c:1920
 ieee80211_del_iface+0x12/0x20 net/mac80211/cfg.c:144
 rdev_del_virtual_intf net/wireless/rdev-ops.h:57 [inline]
 cfg80211_destroy_ifaces+0x1d0/0x750 net/wireless/core.c:317
 cfg80211_destroy_iface_wk+0x1a/0x20 net/wireless/core.c:329
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
CR2: 0000000000000080
---[ end trace 85ccf65dd81f163b ]---
RIP: 0010:test_and_set_bit arch/x86/include/asm/bitops.h:209 [inline]
RIP: 0010:try_to_grab_pending+0xcd/0x6f0 kernel/workqueue.c:1229
Code: 3c 02 00 0f 85 26 05 00 00 4c 89 6d 00 e8 4b 53 29 00 31 ff 44 89 e6 e8 81 2c 24 00 45 84 e4 0f 85 da 01 00 00 e8 43 2b 24 00 <f0> 48 0f ba 2b 00 41 0f 92 c4 31 ff 44 89 e6 e8 5f 2c 24 00 45 84
RSP: 0018:ffff88804997f870 EFLAGS: 00010093
RAX: ffff88804dc26300 RBX: 0000000000000080 RCX: ffffffff813e5a1f
RDX: 0000000000000000 RSI: ffffffff813e5a2d RDI: 0000000000000001
RBP: ffff88804997f8e8 R08: 0000000000400000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000293 R14: dffffc0000000010 R15: ffff88804dc26300
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 00000000a166b000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	3c 02                	cmp    $0x2,%al
   2:	00 0f                	add    %cl,(%rdi)
   4:	85 26                	test   %esp,(%rsi)
   6:	05 00 00 4c 89       	add    $0x894c0000,%eax
   b:	6d                   	insl   (%dx),%es:(%rdi)
   c:	00 e8                	add    %ch,%al
   e:	4b 53                	rex.WXB push %r11
  10:	29 00                	sub    %eax,(%rax)
  12:	31 ff                	xor    %edi,%edi
  14:	44 89 e6             	mov    %r12d,%esi
  17:	e8 81 2c 24 00       	callq  0x242c9d
  1c:	45 84 e4             	test   %r12b,%r12b
  1f:	0f 85 da 01 00 00    	jne    0x1ff
  25:	e8 43 2b 24 00       	callq  0x242b6d
* 2a:	f0 48 0f ba 2b 00    	lock btsq $0x0,(%rbx) <-- trapping instruction
  30:	41 0f 92 c4          	setb   %r12b
  34:	31 ff                	xor    %edi,%edi
  36:	44 89 e6             	mov    %r12d,%esi
  39:	e8 5f 2c 24 00       	callq  0x242c9d
  3e:	45                   	rex.RB
  3f:	84                   	.byte 0x84