general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 1 PID: 5882 Comm: syz.4.1448 Tainted: G W 5.10.226-syzkaller-00001-g6a01908517df #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:do_unlinkat+0x3b2/0x8b0 fs/namei.c:4029 Code: de e8 e2 88 b6 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 bf ec ff ff ff 41 29 c7 e9 99 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 02 20 f4 ff 49 8b 45 30 48 89 44 24 28 4c RSP: 0018:ffffc900010efda0 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffff888115093b40 RSI: 0000000000000000 RDI: 0000000000000040 RBP: ffffc900010eff18 R08: ffffffff81b42763 R09: ffffed10251c3c2e R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000010 R14: 1ffff110251c3c28 R15: dffffc0000000000 FS: 00007fb70ae466c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb70ae45f98 CR3: 000000010ee18000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4082 [inline] __se_sys_unlink fs/namei.c:4080 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4080 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fb70c20f719 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:00007fb70ae46038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007fb70c3c7130 RCX: 00007fb70c20f719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007fb70c28275e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb70c3c7130 R15: 00007ffec1eaed98 Modules linked in: ---[ end trace 61235b35196625f1 ]--- RIP: 0010:do_unlinkat+0x3b2/0x8b0 fs/namei.c:4029 Code: de e8 e2 88 b6 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 bf ec ff ff ff 41 29 c7 e9 99 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 02 20 f4 ff 49 8b 45 30 48 89 44 24 28 4c RSP: 0018:ffffc900010efda0 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffff888115093b40 RSI: 0000000000000000 RDI: 0000000000000040 RBP: ffffc900010eff18 R08: ffffffff81b42763 R09: ffffed10251c3c2e R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000010 R14: 1ffff110251c3c28 R15: dffffc0000000000 FS: 00007fb70ae466c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557c91f321d8 CR3: 000000010ee18000 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: e2 88 loop 0xffffff8c 4: b6 ff mov $0xff,%dh 6: 31 c0 xor %eax,%eax 8: 81 fb 00 00 20 00 cmp $0x200000,%ebx e: 0f 94 c0 sete %al 11: 41 bf ec ff ff ff mov $0xffffffec,%r15d 17: 41 29 c7 sub %eax,%r15d 1a: e9 99 00 00 00 jmp 0xb8 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 02 20 f4 ff call 0xfff42038 36: 49 8b 45 30 mov 0x30(%r13),%rax 3a: 48 89 44 24 28 mov %rax,0x28(%rsp) 3f: 4c rex.WR