general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 289 Comm: syz-executor139 Not tainted 5.10.234-syzkaller-00157-ge0b88ee5f09c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:dir_rename fs/incfs/vfs.c:1394 [inline] RIP: 0010:dir_rename_wrap+0xf7/0x570 fs/incfs/vfs.c:85 Code: 4c 89 e7 e8 1b 1d 9d ff 49 8b 1c 24 eb 07 e8 a0 7d 5f ff 31 db 48 83 c3 08 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 eb 1c 9d ff 48 8b 1b 48 85 db 0f 84 RSP: 0018:ffffc90000b37b20 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000b37b90 R08: ffffffff820b418a R09: fffff52000166f55 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881092f2188 R13: ffff888121014dd0 R14: ffff88810cbaa860 R15: ffff88810cbaa800 FS: 00005555643c4480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000000 CR3: 000000010b6bf000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_rename+0x9fb/0xeb0 fs/namei.c:4474 do_renameat2+0xa56/0x1240 fs/namei.c:4619 __do_sys_rename fs/namei.c:4670 [inline] __se_sys_rename fs/namei.c:4668 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:4668 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f4450597bc9 Code: 48 83 c4 28 c3 e8 67 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe54f6f628 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 0073646165725f67 RCX: 00007f4450597bc9 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000200000000040 RBP: 00007ffe54f6f638 R08: 00007ffe54f6f638 R09: 00007f4450564be0 R10: 00007ffe54f6f630 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe54f6f898 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 9cc876450f3053d0 ]--- RIP: 0010:dir_rename fs/incfs/vfs.c:1394 [inline] RIP: 0010:dir_rename_wrap+0xf7/0x570 fs/incfs/vfs.c:85 Code: 4c 89 e7 e8 1b 1d 9d ff 49 8b 1c 24 eb 07 e8 a0 7d 5f ff 31 db 48 83 c3 08 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 eb 1c 9d ff 48 8b 1b 48 85 db 0f 84 RSP: 0018:ffffc90000b37b20 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000b37b90 R08: ffffffff820b418a R09: fffff52000166f55 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881092f2188 R13: ffff888121014dd0 R14: ffff88810cbaa860 R15: ffff88810cbaa800 FS: 00005555643c4480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b844b06008 CR3: 000000010b6bf000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 89 e7 mov %r12,%rdi 3: e8 1b 1d 9d ff call 0xff9d1d23 8: 49 8b 1c 24 mov (%r12),%rbx c: eb 07 jmp 0x15 e: e8 a0 7d 5f ff call 0xff5f7db3 13: 31 db xor %ebx,%ebx 15: 48 83 c3 08 add $0x8,%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 eb 1c 9d ff call 0xff9d1d23 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 85 db test %rbx,%rbx 3e: 0f .byte 0xf 3f: 84 .byte 0x84