syzbot

general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 PID: 294 Comm: syz-executor244 Not tainted 5.15.151-syzkaller-00415-gdb06c48ab67e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:do_renameat2+0x6fd/0x1480 fs/namei.c:4933
Code: f2 e8 67 f0 fe ff 48 89 c3 48 3d 01 f0 ff ff 72 12 e8 17 de b1 ff 41 89 de 48 8b 5c 24 18 e9 6f 05 00 00 49 89 de 49 c1 ee 03 <43> 0f b6 04 26 84 c0 0f 85 8a 07 00 00 48 89 5c 24 40 8b 1b be 00
RSP: 0018:ffffc90000a67c00 EFLAGS: 00010202
RAX: 0000000000000010 RBX: 0000000000000010 RCX: ffff8881205362c0
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffffc90000a67ee0 R08: ffffffff81c09428 R09: ffffed10239b6050
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90000a67de8 R14: 0000000000000002 R15: ffff88811cdb0250
FS:  00007f3cb1ebc6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cb1e9bd58 CR3: 000000011e37e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __do_sys_renameat2 fs/namei.c:5018 [inline]
 __se_sys_renameat2 fs/namei.c:5015 [inline]
 __x64_sys_renameat2+0xdd/0xf0 fs/namei.c:5015
 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: 0033:0x7f3cb1efa679
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:00007f3cb1ebc218 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f3cb1f893e8 RCX: 00007f3cb1efa679
RDX: 0000000000000004 RSI: 0000000020000500 RDI: 0000000000000004
RBP: 00007f3cb1f893e0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000200001c0 R11: 0000000000000246 R12: 00007f3cb1f5609c
R13: 0030656c69662f2e R14: 00007f3cb1f560ca R15: 0000002000000000
 </TASK>
Modules linked in:
---[ end trace 3103025052233309 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:do_renameat2+0x6fd/0x1480 fs/namei.c:4933
Code: f2 e8 67 f0 fe ff 48 89 c3 48 3d 01 f0 ff ff 72 12 e8 17 de b1 ff 41 89 de 48 8b 5c 24 18 e9 6f 05 00 00 49 89 de 49 c1 ee 03 <43> 0f b6 04 26 84 c0 0f 85 8a 07 00 00 48 89 5c 24 40 8b 1b be 00
RSP: 0018:ffffc90000a67c00 EFLAGS: 00010202
RAX: 0000000000000010 RBX: 0000000000000010 RCX: ffff8881205362c0
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffffc90000a67ee0 R08: ffffffff81c09428 R09: ffffed10239b6050
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90000a67de8 R14: 0000000000000002 R15: ffff88811cdb0250
FS:  00007f3cb1ebc6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cb1e9bd58 CR3: 000000011e37e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f2 e8 67 f0 fe ff    	bnd call 0xfffef06d
   6:	48 89 c3             	mov    %rax,%rbx
   9:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   f:	72 12                	jb     0x23
  11:	e8 17 de b1 ff       	call   0xffb1de2d
  16:	41 89 de             	mov    %ebx,%r14d
  19:	48 8b 5c 24 18       	mov    0x18(%rsp),%rbx
  1e:	e9 6f 05 00 00       	jmp    0x592
  23:	49 89 de             	mov    %rbx,%r14
  26:	49 c1 ee 03          	shr    $0x3,%r14
* 2a:	43 0f b6 04 26       	movzbl (%r14,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 8a 07 00 00    	jne    0x7c1
  37:	48 89 5c 24 40       	mov    %rbx,0x40(%rsp)
  3c:	8b 1b                	mov    (%rbx),%ebx
  3e:	be                   	.byte 0xbe