general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 0 PID: 21069 Comm: syz-executor.4 Tainted: G W 6.1.75-syzkaller-00037-gdcb09569bbff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:do_unlinkat+0x3e1/0x920 fs/namei.c:4389 Code: de e8 93 bd ac 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 83 9a f3 ff 49 8b 45 30 48 89 44 24 38 4c RSP: 0018:ffffc90008a5fd80 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffff888116b72880 RSI: 0000000000000000 RDI: 0000000000000040 RBP: ffffc90008a5ff08 R08: ffffffff81c8a3e2 R09: fffff5200114bf91 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000010 R14: dffffc0000000000 R15: 1ffff1102a2326f4 FS: 00007f1fea3876c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001225f9000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 00000000872c9164 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4445 [inline] __se_sys_unlink fs/namei.c:4443 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4443 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1fe967dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1fea3870c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f1fe97ac120 RCX: 00007f1fe967dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f1fe96ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f1fe97ac120 R15: 00007ffde6544c98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_unlinkat+0x3e1/0x920 fs/namei.c:4389 Code: de e8 93 bd ac 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 83 9a f3 ff 49 8b 45 30 48 89 44 24 38 4c RSP: 0018:ffffc90008a5fd80 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffff888116b72880 RSI: 0000000000000000 RDI: 0000000000000040 RBP: ffffc90008a5ff08 R08: ffffffff81c8a3e2 R09: fffff5200114bf91 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000010 R14: dffffc0000000000 R15: 1ffff1102a2326f4 FS: 00007f1fea3876c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001225f9000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 00000000872c9164 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: de e8 fsubrp %st,%st(0) 2: 93 xchg %eax,%ebx 3: bd ac ff 31 c0 mov $0xc031ffac,%ebp 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 83 9a f3 ff call 0xfff39ab9 36: 49 8b 45 30 mov 0x30(%r13),%rax 3a: 48 89 44 24 38 mov %rax,0x38(%rsp) 3f: 4c rex.WR