WARNING: CPU: 1 PID: 9266 at include/linux/cpumask.h:121 cpu_max_bits_warn include/linux/cpumask.h:121 [inline] WARNING: CPU: 1 PID: 9266 at include/linux/cpumask.h:121 cpumask_check include/linux/cpumask.h:128 [inline] WARNING: CPU: 1 PID: 9266 at include/linux/cpumask.h:121 cpumask_test_cpu include/linux/cpumask.h:344 [inline] WARNING: CPU: 1 PID: 9266 at include/linux/cpumask.h:121 io_sq_offload_start fs/io_uring.c:2244 [inline] WARNING: CPU: 1 PID: 9266 at include/linux/cpumask.h:121 io_uring_create fs/io_uring.c:2865 [inline] WARNING: CPU: 1 PID: 9266 at include/linux/cpumask.h:121 io_uring_setup+0x1399/0x1ac0 fs/io_uring.c:2917 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9266 Comm: syz-executor.3 Not tainted 5.1.0-rc7-next-20190502 #35 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x75a kernel/panic.c:218 __warn.cold+0x20/0x47 kernel/panic.c:580 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972 RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:121 [inline] RIP: 0010:cpumask_check include/linux/cpumask.h:128 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:344 [inline] RIP: 0010:io_sq_offload_start fs/io_uring.c:2244 [inline] RIP: 0010:io_uring_create fs/io_uring.c:2865 [inline] RIP: 0010:io_uring_setup+0x1399/0x1ac0 fs/io_uring.c:2917 Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 f8 fd ff ff 4c 89 f7 e8 a1 67 e0 ff e9 eb fd ff ff e8 c7 96 a7 ff <0f> 0b e9 27 f7 ff ff e8 bb 96 a7 ff 4c 89 ff e8 53 ea 78 ff e9 fd RSP: 0018:ffff88805f0a7dc8 EFLAGS: 00010206 RAX: 0000000000040000 RBX: 00000000fffffffc RCX: ffffc9000c440000 RDX: 0000000000000270 RSI: ffffffff81c97489 RDI: 0000000000000005 RBP: ffff88805f0a7ef0 R08: ffff88805c8d2140 R09: ffffed100c4709bc R10: ffffed100c4709bb R11: ffff888062384ddf R12: ffff8880674aed00 R13: ffff88805f0a7ec8 R14: ffff8880674aed40 R15: ffff8880674aed54 __do_sys_io_uring_setup fs/io_uring.c:2930 [inline] __se_sys_io_uring_setup fs/io_uring.c:2927 [inline] __x64_sys_io_uring_setup+0x54/0x80 fs/io_uring.c:2927 do_syscall_64+0x103/0x670 arch/x86/entry/common.c:298 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f250a558c78 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458da9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000c92 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f250a5596d4 R13: 00000000004bffde R14: 00000000004d2318 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..