general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 3164 Comm: syz-executor.3 Not tainted 5.15.131-syzkaller-00653-gea586874d2f9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:traverse_mounts fs/namei.c:1376 [inline] RIP: 0010:handle_mounts fs/namei.c:1496 [inline] RIP: 0010:step_into+0x1b6/0xe70 fs/namei.c:1802 Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 09 cc f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 RSP: 0018:ffffc90000f775a0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000040000 RDX: ffffc9000384b000 RSI: 0000000000000257 RDI: 0000000000000258 RBP: ffffc90000f776d0 R08: ffffffff81be14d0 R09: ffffed102cf701ad R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001eeecb R13: dffffc0000000000 R14: ffffc90000f77bc0 R15: 0000000000000011 FS: 00007f1ba06406c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ba061efa8 CR3: 00000001872c4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: walk_component+0x359/0x610 fs/namei.c:1978 link_path_walk+0x642/0xd90 path_openat+0x271/0x2f40 fs/namei.c:3668 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13f/0x830 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_creat fs/open.c:1324 [inline] __se_sys_creat fs/open.c:1318 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1318 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: 0033:0x7f1ba18bdae9 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:00007f1ba06400c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f1ba19dcf80 RCX: 00007f1ba18bdae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f1ba190947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f1ba19dcf80 R15: 00007fff8efcd1c8 Modules linked in: ---[ end trace 808e2455f3da76aa ]--- RIP: 0010:traverse_mounts fs/namei.c:1376 [inline] RIP: 0010:handle_mounts fs/namei.c:1496 [inline] RIP: 0010:step_into+0x1b6/0xe70 fs/namei.c:1802 Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 09 cc f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 RSP: 0018:ffffc90000f775a0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000040000 RDX: ffffc9000384b000 RSI: 0000000000000257 RDI: 0000000000000258 RBP: ffffc90000f776d0 R08: ffffffff81be14d0 R09: ffffed102cf701ad R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001eeecb R13: dffffc0000000000 R14: ffffc90000f77bc0 R15: 0000000000000011 FS: 00007f1ba06406c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff6671ebd8 CR3: 00000001872c4000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 20 0f and %cl,(%rdi) 2: 85 99 0a 00 00 44 test %ebx,0x4400000a(%rcx) 8: 8b 3b mov (%rbx),%edi a: 43 80 3c 2c 00 cmpb $0x0,(%r12,%r13,1) f: 74 0a je 0x1b 11: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi 16: e8 09 cc f3 ff call 0xfff3cc24 1b: 48 8b 9c 24 b8 00 00 mov 0xb8(%rsp),%rbx 22: 00 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 86 0a 00 00 jne 0xabd 37: 8b 1b mov (%rbx),%ebx 39: 89 de mov %ebx,%esi 3b: 81 .byte 0x81 3c: e6 00 out %al,$0x0 3e: 00 07 add %al,(%rdi)