=====================================================
BUG: KMSAN: uninit-value in do_user_addr_fault+0x7ee/0x1ee0 arch/x86/mm/fault.c:1340
 do_user_addr_fault+0x7ee/0x1ee0 arch/x86/mm/fault.c:1340
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x69/0x150 arch/x86/mm/fault.c:1562
 asm_exc_page_fault+0x1e/0x30

Local variable regs created at:
 __bpf_prog_run32+0x84/0x180 kernel/bpf/core.c:1795
 bpf_dispatcher_nop_func include/linux/bpf.h:727 [inline]
 __bpf_prog_run include/linux/filter.h:626 [inline]
 bpf_prog_run include/linux/filter.h:633 [inline]
 BPF_PROG_RUN_ARRAY include/linux/bpf.h:1301 [inline]
 trace_call_bpf+0x2c3/0x720 kernel/trace/bpf_trace.c:127

CPU: 0 PID: 12202 Comm: syz-executor.0 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================
Kernel panic - not syncing: kmsan.panic set ...
CPU: 0 PID: 12202 Comm: syz-executor.0 Tainted: G    B             5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106
 dump_stack+0x25/0x28 lib/dump_stack.c:113
 panic+0x487/0xe1f kernel/panic.c:232
 kmsan_report+0x2e6/0x2f0 mm/kmsan/report.c:207
 __msan_warning+0xb8/0x130 mm/kmsan/instrumentation.c:222
 do_user_addr_fault+0x7ee/0x1ee0 arch/x86/mm/fault.c:1340
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x69/0x150 arch/x86/mm/fault.c:1562
 asm_exc_page_fault+0x1e/0x30
RIP: 0023:0xf6e95116
Code: 6c 01 4c 24 6c 89 44 24 68 8b 44 24 30 8b 54 24 0c b9 07 00 00 00 6b c0 34 8d ba 4c a0 f7 ff 8b b4 02 40 8f fc ff 89 74 24 74 <f3> a6 0f 97 c0 1c 00 84 c0 75 2d b8 f4 01 00 00 8b 74 24 78 8b 7c
RSP: 002b:00000000ffb0ef30 EFLAGS: 00010202
RAX: 00000000000018c8 RBX: 00000000f6fda3f8 RCX: 0000000000000007
RDX: 00000000f6faf000 RSI: 00000000f6f54ec6 RDI: 00000000f6f2904c
RBP: 00000000f6fda400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..
----------------
Code disassembly (best guess):
   0:	6c                   	insb   (%dx),%es:(%rdi)
   1:	01 4c 24 6c          	add    %ecx,0x6c(%rsp)
   5:	89 44 24 68          	mov    %eax,0x68(%rsp)
   9:	8b 44 24 30          	mov    0x30(%rsp),%eax
   d:	8b 54 24 0c          	mov    0xc(%rsp),%edx
  11:	b9 07 00 00 00       	mov    $0x7,%ecx
  16:	6b c0 34             	imul   $0x34,%eax,%eax
  19:	8d ba 4c a0 f7 ff    	lea    -0x85fb4(%rdx),%edi
  1f:	8b b4 02 40 8f fc ff 	mov    -0x370c0(%rdx,%rax,1),%esi
  26:	89 74 24 74          	mov    %esi,0x74(%rsp)
* 2a:	f3 a6                	repz cmpsb %es:(%rdi),%ds:(%rsi) <-- trapping instruction
  2c:	0f 97 c0             	seta   %al
  2f:	1c 00                	sbb    $0x0,%al
  31:	84 c0                	test   %al,%al
  33:	75 2d                	jne    0x62
  35:	b8 f4 01 00 00       	mov    $0x1f4,%eax
  3a:	8b 74 24 78          	mov    0x78(%rsp),%esi
  3e:	8b                   	.byte 0x8b
  3f:	7c                   	.byte 0x7c