general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 11896 Comm: syz-executor.5 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:start_creating+0xdc/0x250 fs/debugfs/inode.c:335 Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 49 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 73 60 49 8d 7e 0c 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f6 RSP: 0018:ffffc9000884fab0 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff888086d82450 RCX: ffffffff87ddb64b RDX: 0000000000000001 RSI: 0000000000000008 RDI: 000000000000000c RBP: ffffffff8823e9c0 R08: 0000000000000001 R09: ffffed100a1c081e R10: ffff888050e040ef R11: ffffed100a1c081d R12: 0000000000000000 R13: ffff888086d824b0 R14: 0000000000000000 R15: 0000000000008124 FS: 00007fcc69841700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f49632bbc88 CR3: 000000008fed7000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debugfs_create_file+0x62/0x400 fs/debugfs/inode.c:383 kvm_arch_create_vcpu_debugfs+0x52/0x200 arch/x86/kvm/debugfs.c:48 kvm_create_vcpu_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:3012 [inline] kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:3089 [inline] kvm_vm_ioctl+0x1c0b/0x2440 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3617 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca59 Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcc69840c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e7b80 RCX: 000000000045ca59 RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000005 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000003a0 R14: 00000000004c6395 R15: 00007fcc698416d4 Modules linked in: ---[ end trace 02a87f2f82f36971 ]--- RIP: 0010:start_creating+0xdc/0x250 fs/debugfs/inode.c:335 Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 49 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 73 60 49 8d 7e 0c 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f6 RSP: 0018:ffffc9000884fab0 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff888086d82450 RCX: ffffffff87ddb64b RDX: 0000000000000001 RSI: 0000000000000008 RDI: 000000000000000c RBP: ffffffff8823e9c0 R08: 0000000000000001 R09: ffffed100a1c081e R10: ffff888050e040ef R11: ffffed100a1c081d R12: 0000000000000000 R13: ffff888086d824b0 R14: 0000000000000000 R15: 0000000000008124 FS: 00007fcc69841700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe5bbfb7e0 CR3: 000000008fed7000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400