general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 1 PID: 10377 Comm: syz.4.2485 Not tainted 5.10.226-syzkaller-00709-ge5e5644ea27f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:do_rmdir+0x28e/0x5c0 fs/namei.c:3905 Code: e8 97 94 b6 ff 45 89 e5 48 bb 00 00 00 00 00 fc ff df eb 7c 49 8d 5c 24 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 44 2e f4 ff 48 83 3b 00 74 32 e8 59 RSP: 0018:ffffc90000f47de0 EFLAGS: 00010203 RAX: 0000000000000007 RBX: 000000000000003e RCX: dffffc0000000000 RDX: ffffc90009d43000 RSI: 0000000000000227 RDI: 0000000000000228 RBP: ffffc90000f47f18 R08: ffffffff81b68a38 R09: ffffed10220cc7a4 R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000000e R13: ffff888110663cf0 R14: 1ffff110220cc79e R15: ffffc90000f47e01 FS: 00007f4449a486c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4449a47f98 CR3: 000000011a64c000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_rmdir fs/namei.c:3930 [inline] __se_sys_rmdir fs/namei.c:3928 [inline] __x64_sys_rmdir+0x49/0x50 fs/namei.c:3928 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f444adefff9 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:00007f4449a48038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007f444afa8058 RCX: 00007f444adefff9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200 RBP: 00007f444ae62296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f444afa8058 R15: 00007ffcac6291f8 Modules linked in: ---[ end trace d714e153c70408d0 ]--- RIP: 0010:do_rmdir+0x28e/0x5c0 fs/namei.c:3905 Code: e8 97 94 b6 ff 45 89 e5 48 bb 00 00 00 00 00 fc ff df eb 7c 49 8d 5c 24 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 44 2e f4 ff 48 83 3b 00 74 32 e8 59 RSP: 0018:ffffc90000f47de0 EFLAGS: 00010203 RAX: 0000000000000007 RBX: 000000000000003e RCX: dffffc0000000000 RDX: ffffc90009d43000 RSI: 0000000000000227 RDI: 0000000000000228 RBP: ffffc90000f47f18 R08: ffffffff81b68a38 R09: ffffed10220cc7a4 R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000000e R13: ffff888110663cf0 R14: 1ffff110220cc79e R15: ffffc90000f47e01 FS: 00007f4449a486c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001380 CR3: 000000011a64c000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 97 94 b6 ff call 0xffb6949c 5: 45 89 e5 mov %r12d,%r13d 8: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx f: fc ff df 12: eb 7c jmp 0x90 14: 49 8d 5c 24 30 lea 0x30(%r12),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 44 2e f4 ff call 0xfff42e7c 38: 48 83 3b 00 cmpq $0x0,(%rbx) 3c: 74 32 je 0x70 3e: e8 .byte 0xe8 3f: 59 pop %rcx