general protection fault, probably for non-canonical address 0xdffffc000000011d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000008e8-0x00000000000008ef] CPU: 0 PID: 32331 Comm: syz-executor.2 Not tainted 6.5.0-syzkaller-12145-g4a0fc73da97e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:io_sqpoll_wq_cpu_affinity+0x81/0xc0 io_uring/sqpoll.c:433 Code: a8 00 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 0f 0e 1f f7 bb e8 08 00 00 49 03 1c 24 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 f0 0d 1f f7 48 8b 3b 4c 89 f6 e8 RSP: 0000:ffffc9000af17dc8 EFLAGS: 00010206 RAX: 000000000000011d RBX: 00000000000008e8 RCX: ffff88807b190000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000002 R08: ffff888055269813 R09: 1ffff1100aa4d302 R10: dffffc0000000000 R11: ffffed100aa4d303 R12: ffff8880552698a8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888055269800 FS: 00007f726995d6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffceb12eba8 CR3: 0000000026ad4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __io_register_iowq_aff+0x94/0xd0 io_uring/io_uring.c:4207 io_unregister_iowq_aff io_uring/io_uring.c:4247 [inline] __io_uring_register io_uring/io_uring.c:4453 [inline] __do_sys_io_uring_register io_uring/io_uring.c:4539 [inline] __se_sys_io_uring_register+0xf30/0x1470 io_uring/io_uring.c:4499 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f726ae7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f726995d0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007f726af9c120 RCX: 00007f726ae7cae9 RDX: 0000000000000000 RSI: 0000000000000012 RDI: 0000000000000003 RBP: 00007f726aec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f726af9c120 R15: 00007ffdfd138928 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:io_sqpoll_wq_cpu_affinity+0x81/0xc0 io_uring/sqpoll.c:433 Code: a8 00 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 0f 0e 1f f7 bb e8 08 00 00 49 03 1c 24 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 f0 0d 1f f7 48 8b 3b 4c 89 f6 e8 RSP: 0000:ffffc9000af17dc8 EFLAGS: 00010206 RAX: 000000000000011d RBX: 00000000000008e8 RCX: ffff88807b190000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000002 R08: ffff888055269813 R09: 1ffff1100aa4d302 R10: dffffc0000000000 R11: ffffed100aa4d303 R12: ffff8880552698a8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888055269800 FS: 00007f726995d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f79b3975198 CR3: 0000000026ad4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: a8 00 test $0x0,%al 2: 00 00 add %al,(%rax) 4: 4c 89 e0 mov %r12,%rax 7: 48 c1 e8 03 shr $0x3,%rax b: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 10: 74 08 je 0x1a 12: 4c 89 e7 mov %r12,%rdi 15: e8 0f 0e 1f f7 call 0xf71f0e29 1a: bb e8 08 00 00 mov $0x8e8,%ebx 1f: 49 03 1c 24 add (%r12),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 f0 0d 1f f7 call 0xf71f0e29 39: 48 8b 3b mov (%rbx),%rdi 3c: 4c 89 f6 mov %r14,%rsi 3f: e8 .byte 0xe8