general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 369 Comm: syz-executor.0 Not tainted 6.1.1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:do_unlinkat+0x3ac/0x850 fs/namei.c:4312 Code: 00 00 60 00 31 c9 3d 00 00 20 00 0f 94 c1 41 be ec ff ff ff 41 29 ce e9 b8 00 00 00 4c 89 eb 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 58 9f f5 ff 4c 8b 7b 30 48 89 d8 48 c1 e8 RSP: 0018:ffffc90000e07da0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000002 RCX: 0000000300000000 RDX: ffff88810e26b858 RSI: 0000000000000008 RDI: 0000000000000032 RBP: ffffc90000e07f08 R08: dffffc0000000000 R09: fffff520001c0f93 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11021c4d706 R13: 0000000000000002 R14: ffff88810e26b830 R15: dffffc0000000000 FS: 00007fbddd85c700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9e61cd4ae0 CR3: 0000000111d45000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0x44/0x50 fs/namei.c:4366 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbddca8c389 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:00007fbddd85c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007fbddcbabf80 RCX: 00007fbddca8c389 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007fbddcad7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1612ac3f R14: 00007fbddd85c300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_unlinkat+0x3ac/0x850 fs/namei.c:4312 Code: 00 00 60 00 31 c9 3d 00 00 20 00 0f 94 c1 41 be ec ff ff ff 41 29 ce e9 b8 00 00 00 4c 89 eb 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 58 9f f5 ff 4c 8b 7b 30 48 89 d8 48 c1 e8 RSP: 0018:ffffc90000e07da0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000002 RCX: 0000000300000000 RDX: ffff88810e26b858 RSI: 0000000000000008 RDI: 0000000000000032 RBP: ffffc90000e07f08 R08: dffffc0000000000 R09: fffff520001c0f93 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11021c4d706 R13: 0000000000000002 R14: ffff88810e26b830 R15: dffffc0000000000 FS: 00007fbddd85c700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9e61cd4ae0 CR3: 0000000111d45000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 60 00 add %ah,0x0(%rax) 3: 31 c9 xor %ecx,%ecx 5: 3d 00 00 20 00 cmp $0x200000,%eax a: 0f 94 c1 sete %cl d: 41 be ec ff ff ff mov $0xffffffec,%r14d 13: 41 29 ce sub %ecx,%r14d 16: e9 b8 00 00 00 jmpq 0xd3 1b: 4c 89 eb mov %r13,%rbx 1e: 49 8d 7d 30 lea 0x30(%r13),%rdi 22: 48 89 f8 mov %rdi,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2e: 74 05 je 0x35 30: e8 58 9f f5 ff callq 0xfff59f8d 35: 4c 8b 7b 30 mov 0x30(%rbx),%r15 39: 48 89 d8 mov %rbx,%rax 3c: 48 rex.W 3d: c1 .byte 0xc1 3e: e8 .byte 0xe8