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: 21537 Comm: kworker/u6:0 Not tainted 6.6.0-rc3-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 : [<807c9634>]    lr : [<807c9bf0>]    psr: 20000013
sp : eba91e48  ip : eba91e78  fp : eba91e74
r10: 827e4691  r9 : 84508000  r8 : ffffffff
r7 : 8450834c  r6 : 00000001  r5 : 8450b800  r4 : 00000000
r3 : 00000000  r2 : 00000000  r1 : 8450b800  r0 : 84508000
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 8d997bc0  DAC: 00000000
Register r0 information: slab kmalloc-2k start 84508000 pointer offset 0 size 2048
Register r1 information: slab kmalloc-2k start 8450b800 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 8450b800 pointer offset 0 size 2048
Register r6 information: non-paged memory
Register r7 information: slab kmalloc-2k start 84508000 pointer offset 844 size 2048
Register r8 information: non-paged memory
Register r9 information: slab kmalloc-2k start 84508000 pointer offset 0 size 2048
Register r10 information: non-slab/vmalloc memory
Register r11 information: 2-page vmalloc region starting at 0xeba90000 allocated at kernel_clone+0xac/0x424 kernel/fork.c:2909
Register r12 information: 2-page vmalloc region starting at 0xeba90000 allocated at kernel_clone+0xac/0x424 kernel/fork.c:2909
Process kworker/u6:0 (pid: 21537, stack limit = 0xeba90000)
Stack: (0xeba91e48 to 0xeba92000)
1e40:                   84d0a340 00000014 84508000 84508040 8450834c 82604d40
1e60: 845083cc 827e4691 eba91e9c eba91e78 807c9bf0 807c9608 00000000 19c2459f
1e80: 845083bc 84508000 84508040 8450834c eba91f04 eba91ea0 81826490 807c9bb4
1ea0: eba91ebc 845083cc 0004380d 84508000 00000000 00000000 00000000 81824fc0
1ec0: 00000000 00030003 eba91ec8 eba91ec8 84508000 19c2459f eba91f48 85819900
1ee0: 845083bc 82de4000 82de2000 00000180 84d0a340 82de4005 eba91f44 eba91f08
1f00: 80265fd4 818260f4 eba91f2c eba91f18 eba91f44 eba91f20 8026196c 85819900
1f20: 8581992c 82de2000 82604d40 82de2020 84d0a340 61c88647 eba91f84 eba91f48
1f40: 80266520 80265e44 eba91f64 eba91f58 81847b70 80278e68 eba91f84 89d58ac0
1f60: 84d0a340 802662e0 85819900 89d58e80 eaac9e98 00000000 eba91fac eba91f88
1f80: 8026d8e0 802662ec 89d58ac0 8026d7dc 00000000 00000000 00000000 00000000
1fa0: 00000000 eba91fb0 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: 
[<807c95fc>] (__io_remove_buffers) from [<807c9bf0>] (io_destroy_buffers+0x48/0x138 io_uring/kbuf.c:264)
 r10:827e4691 r9:845083cc r8:82604d40 r7:8450834c r6:84508040 r5:84508000
 r4:00000014 r3:84d0a340
[<807c9ba8>] (io_destroy_buffers) from [<81826490>] (io_ring_ctx_free io_uring/io_uring.c:2895 [inline])
[<807c9ba8>] (io_destroy_buffers) from [<81826490>] (io_ring_exit_work+0x3a8/0x5ec io_uring/io_uring.c:3151)
 r7:8450834c r6:84508040 r5:84508000 r4:845083bc
[<818260e8>] (io_ring_exit_work) from [<80265fd4>] (process_one_work+0x19c/0x4a8 kernel/workqueue.c:2630)
 r10:82de4005 r9:84d0a340 r8:00000180 r7:82de2000 r6:82de4000 r5:845083bc
 r4:85819900
[<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 r9:84d0a340 r8:82de2020 r7:82604d40 r6:82de2000 r5:8581992c
 r4:85819900
[<802662e0>] (worker_thread) from [<8026d8e0>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:eaac9e98 r8:89d58e80 r7:85819900 r6:802662e0 r5:84d0a340
 r4:89d58ac0
[<8026d7dc>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
Exception stack(0xeba91fb0 to 0xeba91ff8)
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 r4:89d58ac0
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