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: 295 Comm: syz-executor471 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:do_rmdir+0x33f/0x630 fs/namei.c:4208 Code: ff 4c 89 64 24 50 72 0d e8 6e 62 b2 ff 45 89 fc e9 99 00 00 00 49 8d 5f 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 e3 72 f4 ff 48 83 3b 00 74 5d e8 38 RSP: 0018:ffffc900009c7de0 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000038 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffffc900009c7f08 R08: ffffffff81c04f00 R09: ffffed102382bf82 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c15fbe0 R13: ffffc900009c7e60 R14: 1ffff1102382bf7c R15: 0000000000000008 FS: 00007fcb867196c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcb86719d58 CR3: 000000011e2d4000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_rmdir fs/namei.c:4235 [inline] __se_sys_rmdir fs/namei.c:4233 [inline] __x64_sys_rmdir+0x49/0x50 fs/namei.c:4233 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: 0033:0x7fcb867783f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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:00007fcb86719218 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007fcb868043f8 RCX: 00007fcb867783f9 RDX: 00007fcb86755b86 RSI: 0000000000000000 RDI: 0000000020000200 RBP: 00007fcb868043f0 R08: 00007fff8a763ee7 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcb867d101c R13: 00007fcb867d1038 R14: 00007fff8a763e00 R15: 0030656c69662f30 Modules linked in: ---[ end trace 801aba9f83302d84 ]--- RIP: 0010:do_rmdir+0x33f/0x630 fs/namei.c:4208 Code: ff 4c 89 64 24 50 72 0d e8 6e 62 b2 ff 45 89 fc e9 99 00 00 00 49 8d 5f 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 e3 72 f4 ff 48 83 3b 00 74 5d e8 38 RSP: 0018:ffffc900009c7de0 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000038 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffffc900009c7f08 R08: ffffffff81c04f00 R09: ffffed102382bf82 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c15fbe0 R13: ffffc900009c7e60 R14: 1ffff1102382bf7c R15: 0000000000000008 FS: 00007fcb867196c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556cf02d1590 CR3: 000000011e2d4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ff 4c 89 64 decl 0x64(%rcx,%rcx,4) 4: 24 50 and $0x50,%al 6: 72 0d jb 0x15 8: e8 6e 62 b2 ff call 0xffb2627b d: 45 89 fc mov %r15d,%r12d 10: e9 99 00 00 00 jmp 0xae 15: 49 8d 5f 30 lea 0x30(%r15),%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 e3 72 f4 ff call 0xfff4731b 38: 48 83 3b 00 cmpq $0x0,(%rbx) 3c: 74 5d je 0x9b 3e: e8 .byte 0xe8 3f: 38 .byte 0x38