8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 00000000
[00000000] *pgd=84ff3003, *pmd=fe78b003
Internal error: Oops: 207 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 5149 Comm: syz-executor.1 Not tainted 6.1.0-rc6-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at __queue_work+0xa0/0x74c kernel/workqueue.c:1459
LR is at 0x82c00000
pc : [<80260410>]    lr : [<82c00000>]    psr: 60000193
sp : df801e30  ip : 82c00024  fp : df801e74
r10: 8280e800  r9 : 00000000  r8 : 82446498
r7 : 8220c940  r6 : 00000008  r5 : 856cc400  r4 : 8499685c
r3 : 00000000  r2 : 00000000  r1 : 00000004  r0 : 8280e800
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 30c5387d  Table: 8506e300  DAC: fffffffd
Register r0 information: slab kmalloc-512 start 8280e800 pointer offset 0 size 512
Register r1 information: non-paged memory
Register r2 information: NULL pointer
Register r3 information: NULL pointer
Register r4 information: slab kmalloc-2k start 84996800 pointer offset 92 size 2048
Register r5 information: slab kmalloc-512 start 856cc400 pointer offset 0 size 512
Register r6 information: non-paged memory
Register r7 information: non-slab/vmalloc memory
Register r8 information: non-slab/vmalloc memory
Register r9 information: NULL pointer
Register r10 information: slab kmalloc-512 start 8280e800 pointer offset 0 size 512
Register r11 information: 2-page vmalloc region starting at 0xdf800000 allocated at start_kernel+0x588/0x78c init/main.c:1041
Register r12 information: slab radix_tree_node start 82c00000 pointer offset 36
Process syz-executor.1 (pid: 5149, stack limit = 0xecdac000)
Stack: (0xdf801e30 to 0xdf802000)
1e20:                                     df801e4c df801e40 820a235c 850f1700
1e40: 0000001d 00000000 802605e0 8499685c 00000008 856cc400 20000113 00000100
1e60: 0001e730 dddcc900 df801e94 df801e78 80260b0c 8026037c 84996830 816df1a4
1e80: 850f1700 816df1a4 df801ea4 df801e98 816df1cc 80260ac8 df801edc df801ea8
1ea0: 802e4f38 816df1b0 00000168 dddcc900 80260bb0 8e0f3170 84996830 816df1a4
1ec0: df801f00 823d9d10 0001e730 850f1700 df801f4c df801ee0 802e5474 802e4f14
1ee0: 850f1700 82204d40 8220c5d8 8220c498 00000002 00000000 76bb66d0 85079388
1f00: 00000000 df801f10 8029b158 802fab48 df801f4c df801f20 80293fe8 8e0f3170
1f20: 82204084 82204084 00000002 00000001 ecdadfb0 00000002 00000100 850f1700
1f40: df801fbc df801f50 8020133c 802e514c 8176e554 8176e440 00400040 82204d40
1f60: 0001e731 81eba890 820a2344 0000000a 820aaa00 823d843a 823d94a0 8220c5d8
1f80: 8220c498 81ea8f64 820a23d0 82204080 8176e574 820aaa00 81eba890 81eba878
1fa0: ecdadfb0 00000000 76bb66d0 7ea6853c df801fd4 df801fc0 80249f48 802011dc
1fc0: 820aa9dc 81eba890 df801ffc df801fd8 8176dab8 80249eb8 000170dc 20000010
1fe0: ffffffff 850f1700 820a2044 76bb66d0 ecdadfac df802000 81723aa0 8176da48
Backtrace: frame pointer underflow
[<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545)
 r10:dddcc900 r9:0001e730 r8:00000100 r7:20000113 r6:856cc400 r5:00000008
 r4:8499685c
[<80260abc>] (queue_work_on) from [<816df1cc>] (queue_work include/linux/workqueue.h:503 [inline])
[<80260abc>] (queue_work_on) from [<816df1cc>] (nci_cmd_timer+0x28/0x2c net/nfc/nci/core.c:615)
 r7:816df1a4 r6:850f1700 r5:816df1a4 r4:84996830
[<816df1a4>] (nci_cmd_timer) from [<802e4f38>] (call_timer_fn+0x30/0x238 kernel/time/timer.c:1474)
[<802e4f08>] (call_timer_fn) from [<802e5474>] (expire_timers kernel/time/timer.c:1519 [inline])
[<802e4f08>] (call_timer_fn) from [<802e5474>] (__run_timers kernel/time/timer.c:1790 [inline])
[<802e4f08>] (call_timer_fn) from [<802e5474>] (run_timer_softirq+0x334/0x470 kernel/time/timer.c:1803)
 r9:850f1700 r8:0001e730 r7:823d9d10 r6:df801f00 r5:816df1a4 r4:84996830
[<802e5140>] (run_timer_softirq) from [<8020133c>] (__do_softirq+0x16c/0x498 kernel/softirq.c:571)
 r10:850f1700 r9:00000100 r8:00000002 r7:ecdadfb0 r6:00000001 r5:00000002
 r4:82204084
[<802011d0>] (__do_softirq) from [<80249f48>] (invoke_softirq kernel/softirq.c:445 [inline])
[<802011d0>] (__do_softirq) from [<80249f48>] (__irq_exit_rcu kernel/softirq.c:650 [inline])
[<802011d0>] (__do_softirq) from [<80249f48>] (__irq_exit_rcu kernel/softirq.c:640 [inline])
[<802011d0>] (__do_softirq) from [<80249f48>] (irq_exit+0x9c/0xe8 kernel/softirq.c:674)
 r10:7ea6853c r9:76bb66d0 r8:00000000 r7:ecdadfb0 r6:81eba878 r5:81eba890
 r4:820aaa00
[<80249eac>] (irq_exit) from [<8176dab8>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:240)
 r5:81eba890 r4:820aa9dc
[<8176da3c>] (generic_handle_arch_irq) from [<81723aa0>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40)
 r9:76bb66d0 r8:820a2044 r7:850f1700 r6:ffffffff r5:20000010 r4:000170dc
[<81723a84>] (call_with_stack) from [<80200e74>] (__irq_usr+0x74/0x80 arch/arm/kernel/entry-armv.S:436)
Exception stack(0xecdadfb0 to 0xecdadff8)
dfa0:                                     ffffffff 00000004 000001b8 00000000
dfc0: 00000000 00000000 00000000 00000000 7ea683ca 76bb66d0 7ea6853c 76bb620c
dfe0: 2000a950 2000a950 000170dc 000170dc 20000010 ffffffff
Code: 0a00003b e59f06a8 eb532fa3 e1a0a000 (e5990000) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	0a00003b 	beq	0xf4
   4:	e59f06a8 	ldr	r0, [pc, #1704]	; 0x6b4
   8:	eb532fa3 	bl	0x14cbe9c
   c:	e1a0a000 	mov	sl, r0
* 10:	e5990000 	ldr	r0, [r9] <-- trapping instruction