general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f] CPU: 0 PID: 479 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:do_unlinkat+0x288/0x6c0 fs/namei.c:4348 Code: 44 89 ee e8 1a ad b5 ff 45 31 e4 41 81 fd 00 00 20 00 41 0f 95 c4 41 83 c4 eb e9 bd 00 00 00 49 8d 7e 30 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 4c 8b 7c 24 20 74 05 e8 a7 18 f5 ff 49 8b 46 30 48 RSP: 0018:ffffc90001387de0 EFLAGS: 00010207 RAX: 0000000000000009 RBX: 1ffff1102239f716 RCX: ffff88811041bb40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000004e RBP: ffffc90001387ed0 R08: ffff888111cfb8df R09: 1ffff1102239f71b R10: dffffc0000000000 R11: ffffed102239f71c R12: 0000000000000000 R13: dffffc0000000000 R14: 000000000000001e R15: 0000000000000000 FS: 00007f1bb093b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1bb0919ff8 CR3: 000000012fa34000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlinkat fs/namei.c:4399 [inline] __se_sys_unlinkat fs/namei.c:4392 [inline] __x64_sys_unlinkat+0xd8/0xf0 fs/namei.c:4392 x64_sys_call+0x4c0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:264 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1bb0ad8dd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1bb093b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 00007f1bb0d51fa0 RCX: 00007f1bb0ad8dd9 RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffffffffff9c RBP: 00007f1bb0b6ed69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1bb0d52038 R14: 00007f1bb0d51fa0 R15: 00007ffcb1ea28b8 Modules linked in: ---[ end trace 0a77e7af5116ba13 ]--- RIP: 0010:do_unlinkat+0x288/0x6c0 fs/namei.c:4348 Code: 44 89 ee e8 1a ad b5 ff 45 31 e4 41 81 fd 00 00 20 00 41 0f 95 c4 41 83 c4 eb e9 bd 00 00 00 49 8d 7e 30 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 4c 8b 7c 24 20 74 05 e8 a7 18 f5 ff 49 8b 46 30 48 RSP: 0018:ffffc90001387de0 EFLAGS: 00010207 RAX: 0000000000000009 RBX: 1ffff1102239f716 RCX: ffff88811041bb40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000004e RBP: ffffc90001387ed0 R08: ffff888111cfb8df R09: 1ffff1102239f71b R10: dffffc0000000000 R11: ffffed102239f71c R12: 0000000000000000 R13: dffffc0000000000 R14: 000000000000001e R15: 0000000000000000 FS: 00007f1bb093b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1bb0919ff8 CR3: 000000012fa34000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 44 89 ee mov %r13d,%esi 3: e8 1a ad b5 ff call 0xffb5ad22 8: 45 31 e4 xor %r12d,%r12d b: 41 81 fd 00 00 20 00 cmp $0x200000,%r13d 12: 41 0f 95 c4 setne %r12b 16: 41 83 c4 eb add $0xffffffeb,%r12d 1a: e9 bd 00 00 00 jmp 0xdc 1f: 49 8d 7e 30 lea 0x30(%r14),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 4c 8b 7c 24 20 mov 0x20(%rsp),%r15 34: 74 05 je 0x3b 36: e8 a7 18 f5 ff call 0xfff518e2 3b: 49 8b 46 30 mov 0x30(%r14),%rax 3f: 48 rex.W