=====================================================
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
 virt_to_page_or_null+0x11c/0x170 mm/kmsan/shadow.c:79
 kmsan_get_metadata+0xf1/0x160 mm/kmsan/shadow.c:141
 kmsan_get_shadow_origin_ptr+0x4a/0xb0 mm/kmsan/shadow.c:102
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline]
 __msan_metadata_ptr_for_store_8+0x27/0x40 mm/kmsan/instrumentation.c:94
 nilfs_fiemap+0x856/0x15a0 fs/nilfs2/inode.c:1163
 ioctl_fiemap fs/ioctl.c:219 [inline]
 do_vfs_ioctl+0x242b/0x28c0 fs/ioctl.c:531
 __do_compat_sys_ioctl fs/ioctl.c:689 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x701/0x1270 fs/ioctl.c:638
 ia32_sys_call+0x2854/0x4360 arch/x86/include/generated/asm/syscalls_32.h:55
 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 delalloc_blkoff created at:
 nilfs_fiemap+0xbc/0x15a0 fs/nilfs2/inode.c:1110
 ioctl_fiemap fs/ioctl.c:219 [inline]
 do_vfs_ioctl+0x242b/0x28c0 fs/ioctl.c:531

CPU: 0 UID: 0 PID: 14678 Comm: syz.8.1925 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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