=====================================================
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: 4700 Comm: systemd-udevd 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: 0033:0x560bbffba270
Code: 54 16 18 e9 a4 fe ff ff 66 90 c7 43 30 fc ff ff ff e9 02 ff ff ff 0f 1f 40 00 b8 f4 ff ff ff e9 2e ff ff ff 66 0f 1f 44 00 00 <83> 43 20 01 b8 01 00 00 00 e9 1a ff ff ff 66 90 48 8d 0d d9 9e 01
RSP: 002b:00007ffe37d617b0 EFLAGS: 00010202
RAX: 0000000000000044 RBX: 0000560bc04c11c0 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 00007ffe37d61860 RDI: 0000560bc04d8180
RBP: 000000000000000f R08: 0000560bc04d8216 R09: 00000000000000f0
R10: 0000000000000000 R11: 0000560bc04d8120 R12: 00007ffe37d61860
R13: 0000000000000003 R14: 0000560bbffe89a0 R15: 0000000000000011
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..