loop3: detected capacity change from 0 to 1024
=====================================================
BUG: KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 include/linux/irq-entry-common.h:464
 irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 include/linux/irq-entry-common.h:464
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x82/0xa00 kernel/entry/common.c:164
 sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1061
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:697
 smap_save mm/kmsan/instrumentation.c:92 [inline]
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:35 [inline]
 __msan_metadata_ptr_for_store_2+0x11/0x40 mm/kmsan/instrumentation.c:92
 char2uni+0x13e/0x1d0 fs/nls/nls_utf8.c:-1
 asc2unichar fs/hfsplus/unicode.c:367 [inline]
 hfsplus_asc2uni+0x25f/0x1040 fs/hfsplus/unicode.c:458
 hfsplus_cat_build_key+0xaf/0x1d0 fs/hfsplus/catalog.c:49
 hfsplus_lookup+0x1fa/0xf70 fs/hfsplus/dir.c:47
 lookup_one_qstr_excl+0x23b/0x7b0 fs/namei.c:1805
 __start_dirop fs/namei.c:2916 [inline]
 start_dirop fs/namei.c:2938 [inline]
 filename_create+0x2c1/0x570 fs/namei.c:4950
 filename_mkdirat+0xab/0xa60 fs/namei.c:5287
 __do_sys_mkdirat fs/namei.c:5315 [inline]
 __se_sys_mkdirat+0x82/0x330 fs/namei.c:5312
 __x64_sys_mkdirat+0x97/0xe0 fs/namei.c:5312
 x64_sys_call+0x37fc/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:259
 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 u created at:
 char2uni+0x43/0x1d0 fs/nls/nls_utf8.c:32
 asc2unichar fs/hfsplus/unicode.c:367 [inline]
 hfsplus_asc2uni+0x25f/0x1040 fs/hfsplus/unicode.c:458

CPU: 1 UID: 0 PID: 15881 Comm: syz.3.2743 Tainted: G        W    L      syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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