syzbot

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 295 Comm: syz-executor969 Not tainted 5.10.225-syzkaller-00513-g8d23314f588a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:461 [inline]
RIP: 0010:filename_create+0x225/0x750 fs/namei.c:3613
Code: 89 e2 e8 9e 97 ff ff 49 89 c4 48 3d 01 f0 ff ff 72 07 e8 1e bb b6 ff eb 5f 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 70 04 00 00 4c 89 64 24 30 45 8b 24 24 bb
RSP: 0018:ffffc90000b67d40 EFLAGS: 00010247
RAX: 0000000000000000 RBX: ffff88811d2c9030 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffffc90000b67e30 R08: ffffffff81b68a38 R09: ffffed1023a5920c
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000005
R13: 1ffff9200016cfd5 R14: ffffc90000b67ea8 R15: 1ffff9200016cfd4
FS:  00007ffaaf4056c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020010000 CR3: 0000000108784000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 user_path_create fs/namei.c:3665 [inline]
 do_mkdirat+0xcc/0x2c0 fs/namei.c:3805
 __do_sys_mkdir fs/namei.c:3828 [inline]
 __se_sys_mkdir fs/namei.c:3826 [inline]
 __x64_sys_mkdir+0x60/0x70 fs/namei.c:3826
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ffaaf447c69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 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:00007ffaaf405218 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffaaf4d73c8 RCX: 00007ffaaf447c69
RDX: 00007ffaaf447c69 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007ffaaf4d73c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffaaf4a42ec
R13: 00007ffaaf49c039 R14: 0030656c69662f2e R15: 00007ffaaf4a22e8
Modules linked in:
---[ end trace 877129038900ff5e ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:461 [inline]
RIP: 0010:filename_create+0x225/0x750 fs/namei.c:3613
Code: 89 e2 e8 9e 97 ff ff 49 89 c4 48 3d 01 f0 ff ff 72 07 e8 1e bb b6 ff eb 5f 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 70 04 00 00 4c 89 64 24 30 45 8b 24 24 bb
RSP: 0018:ffffc90000b67d40 EFLAGS: 00010247
RAX: 0000000000000000 RBX: ffff88811d2c9030 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffffc90000b67e30 R08: ffffffff81b68a38 R09: ffffed1023a5920c
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000005
R13: 1ffff9200016cfd5 R14: ffffc90000b67ea8 R15: 1ffff9200016cfd4
FS:  00007ffaaf4056c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000006947258 CR3: 0000000108784000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 e2                	mov    %esp,%edx
   2:	e8 9e 97 ff ff       	call   0xffff97a5
   7:	49 89 c4             	mov    %rax,%r12
   a:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
  10:	72 07                	jb     0x19
  12:	e8 1e bb b6 ff       	call   0xffb6bb35
  17:	eb 5f                	jmp    0x78
  19:	4c 89 e0             	mov    %r12,%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:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 70 04 00 00    	jne    0x4a6
  36:	4c 89 64 24 30       	mov    %r12,0x30(%rsp)
  3b:	45 8b 24 24          	mov    (%r12),%r12d
  3f:	bb                   	.byte 0xbb