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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
 __msan_metadata_ptr_for_load_8+0x30/0x40 mm/kmsan/instrumentation.c:94
 arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline]
 raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline]
 raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline]
 atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline]
 __mutex_owner kernel/locking/mutex.h:48 [inline]
 mutex_is_locked+0x26/0x70 kernel/locking/mutex.c:65
 xt_compat_flush_offsets+0x62/0x180 net/netfilter/x_tables.c:734
 compat_get_entries net/ipv4/netfilter/arp_tables.c:1415 [inline]
 do_arpt_get_ctl+0x1bed/0x1cf0 net/ipv4/netfilter/arp_tables.c:1470
 nf_getsockopt+0x497/0x4f0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt+0x29d/0x3f0 net/ipv4/ip_sockglue.c:1777
 tcp_getsockopt+0x174/0x1a0 net/ipv4/tcp.c:4867
 sock_common_getsockopt+0x9c/0xf0 net/core/sock.c:3967
 do_sock_getsockopt+0x56c/0xc30 net/socket.c:2487
 __sys_getsockopt+0x252/0x3d0 net/socket.c:2518
 __do_compat_sys_socketcall net/compat.c:494 [inline]
 __se_compat_sys_socketcall net/compat.c:423 [inline]
 __ia32_compat_sys_socketcall+0xab8/0x1b70 net/compat.c:423
 ia32_sys_call+0x2c57/0x4360 arch/x86/include/generated/asm/syscalls_32.h:103
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x195/0x470 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Local variable warn created at:
 __dquot_alloc_space+0x4d/0x1cd0 fs/quota/dquot.c:1709
 dquot_alloc_space_nodirty include/linux/quotaops.h:292 [inline]
 dquot_alloc_block_nodirty include/linux/quotaops.h:319 [inline]
 shmem_inode_acct_blocks+0x376/0x5d0 mm/shmem.c:242

CPU: 1 UID: 0 PID: 5585 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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