8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 0000000e when read
[0000000e] *pgd=80000080004003, *pmd=00000000
Internal error: Oops: 207 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 PID: 18527 Comm: kworker/u5:1 Not tainted 6.6.0-rc4-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: events_unbound io_ring_exit_work
PC is at __io_remove_buffers io_uring/kbuf.c:219 [inline]
PC is at __io_remove_buffers+0x38/0x184 io_uring/kbuf.c:209
LR is at io_destroy_buffers+0x48/0x138 io_uring/kbuf.c:264
pc : [<807c96e4>]    lr : [<807c9ca0>]    psr: 20000113
sp : ead01e48  ip : ead01e78  fp : ead01e74
r10: 827e4712  r9 : 8aa0f000  r8 : ffffffff
r7 : 8aa0f34c  r6 : 00000001  r5 : 8aa0b000  r4 : 00000000
r3 : 00000000  r2 : 00000000  r1 : 8aa0b000  r0 : 8aa0f000
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 89be2ec0  DAC: 00000000
Register r0 information: slab kmalloc-2k start 8aa0f000 pointer offset 0 size 2048
Register r1 information: slab kmalloc-2k start 8aa0b000 pointer offset 0 size 2048
Register r2 information: NULL pointer
Register r3 information: NULL pointer
Register r4 information: NULL pointer
Register r5 information: slab kmalloc-2k start 8aa0b000 pointer offset 0 size 2048
Register r6 information: non-paged memory
Register r7 information: slab kmalloc-2k start 8aa0f000 pointer offset 844 size 2048
Register r8 information: non-paged memory
Register r9 information: slab kmalloc-2k start 8aa0f000 pointer offset 0 size 2048
Register r10 information: non-slab/vmalloc memory
Register r11 information: 2-page vmalloc region starting at 0xead00000 allocated at kernel_clone+0xac/0x424 kernel/fork.c:2909
Register r12 information: 2-page vmalloc region starting at 0xead00000 allocated at kernel_clone+0xac/0x424 kernel/fork.c:2909
Process kworker/u5:1 (pid: 18527, stack limit = 0xead00000)
Stack: (0xead01e48 to 0xead02000)
1e40:                   84138bc0 00000014 8aa0f000 8aa0f040 8aa0f34c 82604d40
1e60: 8aa0f3cc 827e4712 ead01e9c ead01e78 807c9ca0 807c96b8 00000000 ab37d012
1e80: 8aa0f3bc 8aa0f000 8aa0f040 8aa0f34c ead01f04 ead01ea0 81826728 807c9c64
1ea0: ead01ebc ead01eb0 000442e0 8aa0f000 00000000 ead01ec0 00000000 81825258
1ec0: 00000000 00000000 ead01ec8 ead01ec8 8aa0f000 ab37d012 ead01f48 8a7e4f80
1ee0: 8aa0f3bc 82c21400 82c0f000 00000140 84138bc0 82c21405 ead01f44 ead01f08
1f00: 80265fd4 8182638c ead01f2c ead01f18 ead01f44 ead01f20 8026196c 8a7e4f80
1f20: 8a7e4fac 82c0f000 82604d40 82c0f020 84138bc0 61c88647 ead01f84 ead01f48
1f40: 80266520 80265e44 82604d40 82604d40 61c88647 8a7e4fac ead01f84 8a603f40
1f60: 84138bc0 802662e0 8a7e4f80 8aa15ac0 eb089e98 00000000 ead01fac ead01f88
1f80: 8026d8e0 802662ec 8a603f40 8026d7dc 00000000 00000000 00000000 00000000
1fa0: 00000000 ead01fb0 80200104 8026d7e8 00000000 00000000 00000000 00000000
1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
Backtrace: 
[<807c96ac>] (__io_remove_buffers) from [<807c9ca0>] (io_destroy_buffers+0x48/0x138 io_uring/kbuf.c:264)
 r10:827e4712 r9:8aa0f3cc r8:82604d40 r7:8aa0f34c r6:8aa0f040 r5:8aa0f000
 r4:00000014 r3:84138bc0
[<807c9c58>] (io_destroy_buffers) from [<81826728>] (io_ring_ctx_free io_uring/io_uring.c:2895 [inline])
[<807c9c58>] (io_destroy_buffers) from [<81826728>] (io_ring_exit_work+0x3a8/0x5ec io_uring/io_uring.c:3151)
 r7:8aa0f34c r6:8aa0f040 r5:8aa0f000 r4:8aa0f3bc
[<81826380>] (io_ring_exit_work) from [<80265fd4>] (process_one_work+0x19c/0x4a8 kernel/workqueue.c:2630)
 r10:82c21405 r9:84138bc0 r8:00000140 r7:82c0f000 r6:82c21400 r5:8aa0f3bc
 r4:8a7e4f80
[<80265e38>] (process_one_work) from [<80266520>] (process_scheduled_works kernel/workqueue.c:2703 [inline])
[<80265e38>] (process_one_work) from [<80266520>] (worker_thread+0x240/0x48c kernel/workqueue.c:2784)
 r10:61c88647 r9:84138bc0 r8:82c0f020 r7:82604d40 r6:82c0f000 r5:8a7e4fac
 r4:8a7e4f80
[<802662e0>] (worker_thread) from [<8026d8e0>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:eb089e98 r8:8aa15ac0 r7:8a7e4f80 r6:802662e0 r5:84138bc0
 r4:8a603f40
[<8026d7dc>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
Exception stack(0xead01fb0 to 0xead01ff8)
1fa0:                                     00000000 00000000 00000000 00000000
1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026d7dc r4:8a603f40
Code: 0a000022 e5913004 e1d120be e5d14013 (e1d380be) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	0a000022 	beq	0x90
   4:	e5913004 	ldr	r3, [r1, #4]
   8:	e1d120be 	ldrh	r2, [r1, #14]
   c:	e5d14013 	ldrb	r4, [r1, #19]
* 10:	e1d380be 	ldrh	r8, [r3, #14] <-- trapping instruction