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BUG: KMSAN: uninit-value in user_mode arch/x86/include/asm/ptrace.h:136 [inline]
BUG: KMSAN: uninit-value in irqentry_enter+0x9d/0xd0 kernel/entry/common.c:326
 user_mode arch/x86/include/asm/ptrace.h:136 [inline]
 irqentry_enter+0x9d/0xd0 kernel/entry/common.c:326
 sysvec_apic_timer_interrupt+0x47/0x1b0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:667
 __phys_addr_nodebug arch/x86/include/asm/page_64.h:23 [inline]
 virt_to_page_or_null+0xae/0xf0 mm/kmsan/shadow.c:135
 kmsan_get_metadata+0x116/0x180 mm/kmsan/shadow.c:202
 kmsan_get_shadow_origin_ptr+0x7b/0xc0 mm/kmsan/shadow.c:156
 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/instrumentation.c:54
 unwind_done arch/x86/include/asm/unwind.h:46 [inline]
 arch_stack_walk+0x32f/0x3c0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:121
 kmsan_save_stack_with_flags mm/kmsan/core.c:78 [inline]
 kmsan_internal_chain_origin+0xa0/0x110 mm/kmsan/core.c:213
 kmsan_memmove_metadata+0x203/0x270 mm/kmsan/core.c:162
 __msan_memcpy+0x5e/0x90 mm/kmsan/instrumentation.c:111
 sock_write_iter+0x5f6/0x680 net/socket.c:1002
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x1083/0x1b00 fs/read_write.c:605
 ksys_write+0x275/0x500 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:667
 do_syscall_64+0x13b/0x320 arch/x86/entry/common.c:53
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Local variable ----old_sa.i.i@__x64_sys_rt_sigaction created at:
 __do_sys_rt_sigaction kernel/signal.c:4315 [inline]
 __se_sys_rt_sigaction kernel/signal.c:4310 [inline]
 __x64_sys_rt_sigaction+0x10f/0x4d0 kernel/signal.c:4310
 do_syscall_64+0x13b/0x320 arch/x86/entry/common.c:53
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