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: 474 Comm: syz.0.15 Not tainted 5.15.153-syzkaller-1070600-gda92e689a0c3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:do_unlinkat+0x3e1/0x920 fs/namei.c:4340 Code: de e8 63 37 b2 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 be ec ff ff ff 41 29 c6 e9 bd 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 c3 5e f4 ff 49 8b 45 30 48 89 44 24 38 4c RSP: 0018:ffffc90002e0fd80 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff888114060000 RDX: ffff888114060000 RSI: 0000000000000000 RDI: 000000000000003a RBP: ffffc90002e0ff08 R08: ffffffff81be14a2 R09: ffffed1021be2782 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 000000000000000a R14: dffffc0000000000 R15: 1ffff11021be277c FS: 00007f0d855da6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0d855d9fa8 CR3: 000000012a1ad000 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 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+0x61/0xcb RIP: 0033:0x7f0d85b733b9 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:00007f0d855da048 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f0d85d02058 RCX: 00007f0d85b733b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f0d85be08e6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f0d85d02058 R15: 00007fff9246dfc8 Modules linked in: ---[ end trace 0773a13ab8166545 ]--- RIP: 0010:do_unlinkat+0x3e1/0x920 fs/namei.c:4340 Code: de e8 63 37 b2 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 be ec ff ff ff 41 29 c6 e9 bd 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 c3 5e f4 ff 49 8b 45 30 48 89 44 24 38 4c RSP: 0018:ffffc90002e0fd80 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff888114060000 RDX: ffff888114060000 RSI: 0000000000000000 RDI: 000000000000003a RBP: ffffc90002e0ff08 R08: ffffffff81be14a2 R09: ffffed1021be2782 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 000000000000000a R14: dffffc0000000000 R15: 1ffff11021be277c FS: 00007f0d855da6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0d855d9fa8 CR3: 000000012a1ad000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: de e8 fsubrp %st,%st(0) 2: 63 37 movsxd (%rdi),%esi 4: b2 ff mov $0xff,%dl 6: 31 c0 xor %eax,%eax 8: 81 fb 00 00 20 00 cmp $0x200000,%ebx e: 0f 94 c0 sete %al 11: 41 be ec ff ff ff mov $0xffffffec,%r14d 17: 41 29 c6 sub %eax,%r14d 1a: e9 bd 00 00 00 jmp 0xdc 1f: 49 8d 7d 30 lea 0x30(%r13),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 05 je 0x36 31: e8 c3 5e f4 ff call 0xfff45ef9 36: 49 8b 45 30 mov 0x30(%r13),%rax 3a: 48 89 44 24 38 mov %rax,0x38(%rsp) 3f: 4c rex.WR