=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:477
 __sysvec_call_function_single+0x48/0x350 arch/x86/kernel/smp.c:272
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:267 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:267
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline]
 __msan_metadata_ptr_for_store_8+0x1d/0x40 mm/kmsan/instrumentation.c:94
 update_stack_state+0x152/0x1c0 arch/x86/kernel/unwind_frame.c:244
 unwind_next_frame+0x116/0x350 arch/x86/kernel/unwind_frame.c:315
 arch_stack_walk+0x1b0/0x280 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xc2/0x100 kernel/stacktrace.c:122
 kmsan_save_stack_with_flags mm/kmsan/core.c:73 [inline]
 kmsan_internal_poison_memory+0x4a/0x90 mm/kmsan/core.c:57
 kmsan_slab_free+0xce/0x140 mm/kmsan/hooks.c:87
 slab_free_hook mm/slub.c:2615 [inline]
 slab_free mm/slub.c:6251 [inline]
 kmem_cache_free+0x254/0xea0 mm/slub.c:6378
 free_filename fs/namei.c:147 [inline]
 putname+0xcb/0x170 fs/namei.c:306
 class_filename_destructor include/linux/fs.h:2553 [inline]
 do_sys_openat2+0x207/0x370 fs/open.c:1365
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0x240/0x300 fs/open.c:1381
 x64_sys_call+0x2445/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable counter created at:
 try_charge_memcg+0x4b/0x1c20 mm/memcontrol.c:2573
 charge_memcg+0x113/0x410 mm/memcontrol.c:5021

CPU: 0 UID: 0 PID: 4940 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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