kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 385 Comm: syz-executor.0 Not tainted 5.4.292-syzkaller-05062-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:vfs_link+0x3c/0x880 fs/namei.c:4346 Code: 89 4d a0 49 89 d4 49 89 f7 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 c3 a4 c8 ff 48 89 5d a8 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 d5 9e f6 ff 48 8b 03 48 89 45 d0 RSP: 0018:ffff8881eaf77c50 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff8881ed61de80 RDX: 0000000000000000 RSI: ffff8881dc752a40 RDI: 0000000000000000 RBP: ffff8881eaf77cb0 R08: dffffc0000000000 R09: ffffed103b8ea55e R10: ffffed103b8ea55e R11: 1ffff1103b8ea55d R12: ffff8881dc6d8bb0 R13: ffff8881eb2d1840 R14: dffffc0000000000 R15: ffff8881dc752a40 FS: 00007f9513c296c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020834000 CR3: 00000001ebb9e000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_link fs/incfs/vfs.c:603 [inline] dir_link+0x2fd/0x470 fs/incfs/vfs.c:1278 vfs_link+0x684/0x880 fs/namei.c:4390 do_linkat+0x37c/0x650 fs/namei.c:4458 __do_sys_linkat fs/namei.c:4482 [inline] __se_sys_linkat fs/namei.c:4479 [inline] __x64_sys_linkat+0xbf/0xd0 fs/namei.c:4479 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f95140c8da9 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:00007f9513c290c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 00007f95141f7050 RCX: 00007f95140c8da9 RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f951411547a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f95141f7050 R15: 00007fff58d82fb8 Modules linked in: ---[ end trace a0b830d868a82b50 ]--- RIP: 0010:vfs_link+0x3c/0x880 fs/namei.c:4346 Code: 89 4d a0 49 89 d4 49 89 f7 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 c3 a4 c8 ff 48 89 5d a8 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 d5 9e f6 ff 48 8b 03 48 89 45 d0 RSP: 0018:ffff8881eaf77c50 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff8881ed61de80 RDX: 0000000000000000 RSI: ffff8881dc752a40 RDI: 0000000000000000 RBP: ffff8881eaf77cb0 R08: dffffc0000000000 R09: ffffed103b8ea55e R10: ffffed103b8ea55e R11: 1ffff1103b8ea55d R12: ffff8881dc6d8bb0 R13: ffff8881eb2d1840 R14: dffffc0000000000 R15: ffff8881dc752a40 FS: 00007f9513c296c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020834000 CR3: 00000001ebb9e000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 4d a0 mov %ecx,-0x60(%rbp) 3: 49 89 d4 mov %rdx,%r12 6: 49 89 f7 mov %rsi,%r15 9: 48 89 fb mov %rdi,%rbx c: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 13: fc ff df 16: e8 c3 a4 c8 ff call 0xffc8a4de 1b: 48 89 5d a8 mov %rbx,-0x58(%rbp) 1f: 48 83 c3 30 add $0x30,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 d5 9e f6 ff call 0xfff69f0e 39: 48 8b 03 mov (%rbx),%rax 3c: 48 89 45 d0 mov %rax,-0x30(%rbp)