=====================================================
BUG: KMSAN: uninit-value in do_user_addr_fault+0x7ff/0x1f80 arch/x86/mm/fault.c:1333
 do_user_addr_fault+0x7ff/0x1f80 arch/x86/mm/fault.c:1333
 handle_page_fault arch/x86/mm/fault.c:1495 [inline]
 __exc_page_fault+0x92/0x1c0 arch/x86/mm/fault.c:1551
 exc_page_fault+0x25/0x30 arch/x86/mm/fault.c:1507
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:605

Local variable ----regs@__bpf_prog_run32 created at:
 __bpf_prog_run32+0x84/0x180 kernel/bpf/core.c:1741
 bpf_dispatcher_nop_func include/linux/bpf.h:684 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1780 [inline]
 bpf_trace_run2+0x123/0x370 kernel/trace/bpf_trace.c:1817
=====================================================
Kernel panic - not syncing: panic_on_kmsan set ...
CPU: 0 PID: 12115 Comm: syz-executor.3 Tainted: G    B   W         5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x25a/0x2f6 lib/dump_stack.c:120
 panic+0x4c7/0xe98 kernel/panic.c:231
 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:179
 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208
 do_user_addr_fault+0x7ff/0x1f80 arch/x86/mm/fault.c:1333
 handle_page_fault arch/x86/mm/fault.c:1495 [inline]
 __exc_page_fault+0x92/0x1c0 arch/x86/mm/fault.c:1551
 exc_page_fault+0x25/0x30 arch/x86/mm/fault.c:1507
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:605
RIP: 0023:0xf6ea113c
Code: f2 ff ff 81 c2 eb 3e 12 00 56 89 c1 53 83 ec 04 8b 9a cc 22 f6 00 8b 82 c8 22 f6 00 8d b3 00 00 00 01 39 d8 72 15 39 f0 73 11 <89> 08 8d 48 04 89 8a c8 22 f6 00 83 c4 04 5b 5e c3 83 ec 0c 56 53
RSP: 002b:00000000ffe3e850 EFLAGS: 00010287
RAX: 0000000030420000 RBX: 0000000030420000 RCX: 0000000000000000
RDX: 00000000f6fc5000 RSI: 0000000031420000 RDI: 00000000f6fc5000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	81 c2 eb 3e 12 00    	add    $0x123eeb,%edx
   6:	56                   	push   %rsi
   7:	89 c1                	mov    %eax,%ecx
   9:	53                   	push   %rbx
   a:	83 ec 04             	sub    $0x4,%esp
   d:	8b 9a cc 22 f6 00    	mov    0xf622cc(%rdx),%ebx
  13:	8b 82 c8 22 f6 00    	mov    0xf622c8(%rdx),%eax
  19:	8d b3 00 00 00 01    	lea    0x1000000(%rbx),%esi
  1f:	39 d8                	cmp    %ebx,%eax
  21:	72 15                	jb     0x38
  23:	39 f0                	cmp    %esi,%eax
  25:	73 11                	jae    0x38
* 27:	89 08                	mov    %ecx,(%rax) <-- trapping instruction
  29:	8d 48 04             	lea    0x4(%rax),%ecx
  2c:	89 8a c8 22 f6 00    	mov    %ecx,0xf622c8(%rdx)
  32:	83 c4 04             	add    $0x4,%esp
  35:	5b                   	pop    %rbx
  36:	5e                   	pop    %rsi
  37:	c3                   	retq
  38:	83 ec 0c             	sub    $0xc,%esp
  3b:	56                   	push   %rsi
  3c:	53                   	push   %rbx