loop4: 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
 char2uni+0x13e/0x1d0 fs/nls/nls_utf8.c:-1
 asc2unichar fs/hfsplus/unicode.c:367 [inline]
 hfsplus_hash_dentry+0x2d2/0x1470 fs/hfsplus/unicode.c:506
 link_path_walk+0x13c4/0x23f0 fs/namei.c:2623
 path_lookupat+0x107/0xdf0 fs/namei.c:2808
 filename_lookup+0x2bc/0x800 fs/namei.c:2838
 ksys_truncate+0xbe/0x2f0 fs/open.c:140
 __do_compat_sys_truncate fs/open.c:160 [inline]
 __se_compat_sys_truncate fs/open.c:158 [inline]
 __ia32_compat_sys_truncate+0x77/0xc0 fs/open.c:158
 ia32_sys_call+0x109a/0x4360 arch/x86/include/generated/asm/syscalls_32.h:93
 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 u created at:
 char2uni+0x43/0x1d0 fs/nls/nls_utf8.c:32
 asc2unichar fs/hfsplus/unicode.c:367 [inline]
 hfsplus_hash_dentry+0x2d2/0x1470 fs/hfsplus/unicode.c:506

CPU: 0 UID: 0 PID: 9233 Comm: syz.4.1080 Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
=====================================================