=====================================================
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: 1 PID: 15261 Comm: modprobe Tainted: G    B             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: 0033:0x7f1fa6b9f48e
Code: eb 28 83 fa 02 0f 84 99 09 00 00 83 fa 03 0f 84 29 09 00 00 83 fa 01 0f 84 c6 08 00 00 48 83 c0 38 48 39 f8 0f 83 92 00 00 00 <8b> 10 83 fa 06 0f 84 32 08 00 00 76 cb 81 fa 51 e5 74 64 0f 84 4e
RSP: 002b:00007ffdac83d510 EFLAGS: 00010287
RAX: 000055bfeb200040 RBX: 000055bfeb200040 RCX: 00007f1fa6dc2428
RDX: 0000000000000009 RSI: fffffffffffff000 RDI: 000055bfeb200238
RBP: 00007ffdac83d710 R08: 00007f1fa6dc2000 R09: 00007f1fa6dc2020
R10: 00007f1fa6dc26e0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007f1fa6dc2170
Kernel Offset: disabled
Rebooting in 86400 seconds..