BUG: unable to handle page fault for address: ffffffff8173cd10
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 5468 Comm: syz.0.33 Tainted: G    B              6.11.0-rc4-next-20240820-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:user_mode arch/x86/include/asm/ptrace.h:214 [inline]
RIP: 0010:show_fault_oops arch/x86/mm/fault.c:544 [inline]
RIP: 0010:page_fault_oops+0x5a0/0xcc0 arch/x86/mm/fault.c:705
Code: 08 8c 49 c7 c6 a0 64 08 8c 4c 0f 44 f0 31 ff e8 56 a8 51 00 48 83 7c 24 50 00 49 c7 c7 60 64 08 8c 4d 0f 44 fe 48 8b 44 24 40 <42> 0f b6 04 28 84 c0 0f 85 21 04 00 00 48 8b 44 24 10 0f b7 30 83
RSP: 0018:ffffc90008c1e480 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffffffff8c086420 RCX: ffff888021411e00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90008c1e610 R08: ffffffff81421d3a R09: 1ffff92001183c30
R10: dffffc0000000000 R11: fffff52001183c31 R12: 1ffff92001183c9c
R13: dffffc0000000000 R14: ffffffff8c0864a0 R15: ffffffff8c086460
FS:  0000555593636500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8173cd10 CR3: 000000002b05e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vsnprintf+0x1ccd/0x1da0 lib/vsprintf.c:2896
 snprintf+0xda/0x120 lib/vsprintf.c:2959
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:user_mode arch/x86/include/asm/ptrace.h:214 [inline]
RIP: 0010:show_fault_oops arch/x86/mm/fault.c:544 [inline]
RIP: 0010:page_fault_oops+0x5a0/0xcc0 arch/x86/mm/fault.c:705
Code: 08 8c 49 c7 c6 a0 64 08 8c 4c 0f 44 f0 31 ff e8 56 a8 51 00 48 83 7c 24 50 00 49 c7 c7 60 64 08 8c 4d 0f 44 fe 48 8b 44 24 40 <42> 0f b6 04 28 84 c0 0f 85 21 04 00 00 48 8b 44 24 10 0f b7 30 83
RSP: 0018:ffffc90008c1e480 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffffffff8c086420 RCX: ffff888021411e00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90008c1e610 R08: ffffffff81421d3a R09: 1ffff92001183c30
R10: dffffc0000000000 R11: fffff52001183c31 R12: 1ffff92001183c9c
R13: dffffc0000000000 R14: ffffffff8c0864a0 R15: ffffffff8c086460
FS:  0000555593636500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8173cd10 CR3: 000000002b05e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	49 c7 c6 a0 64 08 8c 	mov    $0xffffffff8c0864a0,%r14
   7:	4c 0f 44 f0          	cmove  %rax,%r14
   b:	31 ff                	xor    %edi,%edi
   d:	e8 56 a8 51 00       	call   0x51a868
  12:	48 83 7c 24 50 00    	cmpq   $0x0,0x50(%rsp)
  18:	49 c7 c7 60 64 08 8c 	mov    $0xffffffff8c086460,%r15
  1f:	4d 0f 44 fe          	cmove  %r14,%r15
  23:	48 8b 44 24 40       	mov    0x40(%rsp),%rax
* 28:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	0f 85 21 04 00 00    	jne    0x456
  35:	48 8b 44 24 10       	mov    0x10(%rsp),%rax
  3a:	0f b7 30             	movzwl (%rax),%esi
  3d:	83                   	.byte 0x83