Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000015907e000 [0000000000000000] pgd=0800000158b77003, p4d=0800000158b77003, pud=080000015f9be003, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 17837 Comm: syz-executor.2 Not tainted 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __io_sync_cancel+0x80/0xe4 io_uring/cancel.c:224 lr : __io_sync_cancel+0x5c/0xe4 io_uring/cancel.c:221 sp : ffff80001479bc60 x29: ffff80001479bc60 x28: ffff0000feb7b500 x27: 0000000000000018 x26: 0000000000000018 x25: ffff0000feb7b500 x24: 0000000020000000 x23: ffff00012bd5e000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80001479bcd0 x19: ffff00011f920e00 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000dbb8658 x15: 0000000020000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000040000 x11: ff808000095aab1c x10: 0000000000000002 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 00ffff0100000001 x6 : ffff80001479bd28 x5 : ffff80001479bd28 x4 : 0000000000000000 x3 : 0000000000000001 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __io_sync_cancel+0x80/0xe4 io_uring/cancel.c:226 io_sync_cancel+0x29c/0x4a8 io_uring/cancel.c:265 __io_uring_register io_uring/io_uring.c:3833 [inline] __do_sys_io_uring_register+0x398/0x8d0 io_uring/io_uring.c:3878 __se_sys_io_uring_register io_uring/io_uring.c:3858 [inline] __arm64_sys_io_uring_register+0x2c/0x3c io_uring/io_uring.c:3858 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: d503229f f9407ee9 0a150108 aa1f03e0 (f8685928) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d503229f csdb 4: f9407ee9 ldr x9, [x23, #248] 8: 0a150108 and w8, w8, w21 c: aa1f03e0 mov x0, xzr * 10: f8685928 ldr x8, [x9, w8, uxtw #3] <-- trapping instruction