Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f58e47cf168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f58e3babf80 RCX: 00007f58e3a8c0f9 RDX: 0000000000000000 RSI: 000000000000af01 RDI: 0000000000000003 RBP: 00007f58e47cf1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc55d61bff R14: 00007f58e47cf300 R15: 0000000000022000 general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 PID: 5866 Comm: syz-executor.0 Not tainted 6.3.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:vhost_task_start+0x1d/0x40 kernel/vhost_task.c:115 Code: e8 38 c9 6f 00 eb d4 66 0f 1f 44 00 00 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 53 48 89 fb 48 83 c7 70 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0a 48 8b 7b 70 5b e9 23 d1 02 00 e8 fe c8 6f 00 eb RSP: 0018:ffffc90004c87c58 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000400 RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000064 RBP: ffff88806e610000 R08: 0000000000000dc0 R09: 00000000ffffffff R10: 00000000fffffff4 R11: 0000000000000000 R12: ffff88801d58e180 R13: fffffffffffffff4 R14: ffff88806e6100b0 R15: ffff88806e610000 FS: 00007f58e47cf700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3817135028 CR3: 0000000028c66000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vhost_worker_create drivers/vhost/vhost.c:582 [inline] vhost_dev_set_owner+0x2dd/0x940 drivers/vhost/vhost.c:605 vhost_dev_ioctl+0x909/0xc00 drivers/vhost/vhost.c:1766 vhost_vsock_dev_ioctl+0x2e9/0x9d0 drivers/vhost/vsock.c:862 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x123/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f58e3a8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f58e47cf168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f58e3babf80 RCX: 00007f58e3a8c0f9 RDX: 0000000000000000 RSI: 000000000000af01 RDI: 0000000000000003 RBP: 00007f58e47cf1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc55d61bff R14: 00007f58e47cf300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vhost_task_start+0x1d/0x40 kernel/vhost_task.c:115 Code: e8 38 c9 6f 00 eb d4 66 0f 1f 44 00 00 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 53 48 89 fb 48 83 c7 70 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0a 48 8b 7b 70 5b e9 23 d1 02 00 e8 fe c8 6f 00 eb RSP: 0018:ffffc90004c87c58 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000400 RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000064 RBP: ffff88806e610000 R08: 0000000000000dc0 R09: 00000000ffffffff R10: 00000000fffffff4 R11: 0000000000000000 R12: ffff88801d58e180 R13: fffffffffffffff4 R14: ffff88806e6100b0 R15: ffff88806e610000 FS: 00007f58e47cf700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3817135028 CR3: 0000000028c66000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 28 00 sub %al,(%rax) 2: 00 00 add %al,(%rax) 4: 75 05 jne 0xb 6: 48 83 c4 28 add $0x28,%rsp a: c3 retq b: e8 f1 19 00 00 callq 0x1a01 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 c7 c1 b8 ff ff ff mov $0xffffffffffffffb8,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W