BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1b4c4067 P4D 1b4c4067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4082 Comm: syz-executor.0 Not tainted 5.17.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc900029bf8d8 EFLAGS: 00010246
RAX: ffffffff88f936e0 RBX: dffffc0000000000 RCX: 0000000000000003
RDX: 0000000000000003 RSI: ffffc900029bf950 RDI: ffff88801cb128c0
RBP: ffff88801cb12901 R08: 0000000000000000 R09: ffffc900029bf927
R10: fffff52000537f24 R11: 0000000000000001 R12: ffff88801cb12938
R13: 0000000000000003 R14: ffff88801cb128c0 R15: ffffc900029bf950
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000178ff000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 io_do_iopoll+0x219/0xe80 fs/io_uring.c:2819
 io_iopoll_try_reap_events+0x97/0x107 fs/io_uring.c:2873
 io_ring_ctx_wait_and_kill+0x166/0x2b4 fs/io_uring.c:10357
 io_uring_release+0x3d/0x41 fs/io_uring.c:10374
 __fput+0x204/0x8d0 fs/file_table.c:317
 task_work_run+0xc0/0x160 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0x9ab/0x2500 kernel/exit.c:806
 do_group_exit+0xb2/0x2a0 kernel/exit.c:935
 get_signal+0x376/0x2130 kernel/signal.c:2863
 arch_do_signal_or_restart+0x2b2/0x1720 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbb3f7690e9
Code: Unable to access opcode bytes at RIP 0x7fbb3f7690bf.
RSP: 002b:00007fbb3eede218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fbb3f87bf68 RCX: 00007fbb3f7690e9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fbb3f87bf6c
RBP: 00007fbb3f87bf60 R08: 00007ffc44bed080 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00007fbb3f87bf6c
R13: 00007ffc44bde94f R14: 00007fbb3eede300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc900029bf8d8 EFLAGS: 00010246
RAX: ffffffff88f936e0 RBX: dffffc0000000000 RCX: 0000000000000003
RDX: 0000000000000003 RSI: ffffc900029bf950 RDI: ffff88801cb128c0
RBP: ffff88801cb12901 R08: 0000000000000000 R09: ffffc900029bf927
R10: fffff52000537f24 R11: 0000000000000001 R12: ffff88801cb12938
R13: 0000000000000003 R14: ffff88801cb128c0 R15: ffffc900029bf950
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000178ff000 CR4: 0000000000350ef0