=====================================================
BUG: KMSAN: uninit-value in __preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
BUG: KMSAN: uninit-value in preempt_count_add+0x1b5/0x320 kernel/sched/core.c:5532
 __preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
 preempt_count_add+0x1b5/0x320 kernel/sched/core.c:5532
 sysvec_reschedule_ipi+0x1c/0x110 arch/x86/kernel/smp.c:225
 asm_sysvec_reschedule_ipi+0x12/0x20
 update_stack_state+0x677/0xa60 arch/x86/kernel/unwind_frame.c:251
 unwind_next_frame+0x6d0/0xe50 arch/x86/kernel/unwind_frame.c:304
 arch_stack_walk+0x320/0x3c0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:122
 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline]
 kmsan_internal_chain_origin+0xac/0x120 mm/kmsan/core.c:252
 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:163
 __msan_memcpy+0x65/0x90 mm/kmsan/instrumentation.c:145
 sock_write_iter+0x605/0x690 net/socket.c:1062
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write fs/read_write.c:504 [inline]
 vfs_write+0x119f/0x1e80 fs/read_write.c:591
 ksys_write+0x28b/0x510 fs/read_write.c:644
 __do_sys_write fs/read_write.c:656 [inline]
 __se_sys_write fs/read_write.c:653 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:653
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Local variable nd created at:
 filename_lookup+0xc5/0xa50 fs/namei.c:2524
 vfs_statx+0x1e6/0x8c0 fs/stat.c:228

CPU: 0 PID: 2847 Comm: udevd Not tainted 5.18.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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