general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 0 PID: 472 Comm: syz.0.15 Not tainted 5.15.180-syzkaller-1080019-g8034ec1338e8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:do_unlinkat+0x27d/0x6b0 fs/namei.c:4340 Code: 44 89 ee e8 65 d6 b6 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 18 74 05 e8 22 40 f5 ff 49 8b 46 30 48 RSP: 0018:ffffc90002d8fe00 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 1ffff11022214116 RCX: ffff888116e54f00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000003a RBP: ffffc90002d8fee8 R08: dffffc0000000000 R09: ffffed102221411c R10: ffffed102221411c R11: 1ffff1102221411b R12: 0000000000000000 R13: dffffc0000000000 R14: 000000000000000a R15: 0000000000000000 FS: 00007ff2a60ff6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff2a60fefa8 CR3: 000000011c74d000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4396 [inline] __se_sys_unlink fs/namei.c:4394 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4394 x64_sys_call+0x878/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 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: 0033:0x7ff2a66983b9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff2a60ff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007ff2a6827058 RCX: 00007ff2a66983b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007ff2a67058e6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007ff2a6827058 R15: 00007ffc4e09ec78 Modules linked in: ---[ end trace c39b80288481e365 ]--- RIP: 0010:do_unlinkat+0x27d/0x6b0 fs/namei.c:4340 Code: 44 89 ee e8 65 d6 b6 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 18 74 05 e8 22 40 f5 ff 49 8b 46 30 48 RSP: 0018:ffffc90002d8fe00 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 1ffff11022214116 RCX: ffff888116e54f00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000003a RBP: ffffc90002d8fee8 R08: dffffc0000000000 R09: ffffed102221411c R10: ffffed102221411c R11: 1ffff1102221411b R12: 0000000000000000 R13: dffffc0000000000 R14: 000000000000000a R15: 0000000000000000 FS: 00007ff2a60ff6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff2a60fefa8 CR3: 000000011c74d000 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 65 d6 b6 ff call 0xffb6d66d 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 18 mov 0x18(%rsp),%r15 34: 74 05 je 0x3b 36: e8 22 40 f5 ff call 0xfff5405d 3b: 49 8b 46 30 mov 0x30(%r14),%rax 3f: 48 rex.W