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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
 its_return_thunk+0x0/0x10
 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_load_8+0x24/0x40 mm/kmsan/instrumentation.c:94
 udf_map_block+0x5b4/0x76c0 fs/udf/inode.c:440
 __udf_get_block fs/udf/inode.c:467 [inline]
 udf_get_block_wb+0x7c/0x430 fs/udf/inode.c:503
 mpage_write_folio fs/mpage.c:544 [inline]
 __mpage_writepages+0xefd/0x3ec0 fs/mpage.c:686
 udf_writepages+0x44/0x50 fs/udf/inode.c:210
 do_writepages+0x3f2/0x860 mm/page-writeback.c:2571
 filemap_writeback mm/filemap.c:388 [inline]
 filemap_fdatawrite_range mm/filemap.c:413 [inline]
 filemap_fdatawrite+0x207/0x260 mm/filemap.c:419
 udf_expand_file_adinicb+0x521/0xa40 fs/udf/inode.c:380
 udf_setsize+0x96c/0x18f0 fs/udf/inode.c:1294
 udf_setattr+0x5ca/0x880 fs/udf/file.c:245
 notify_change+0x1abe/0x1bd0 fs/attr.c:556
 do_truncate+0x28f/0x310 fs/open.c:68
 vfs_truncate+0x921/0x9d0 fs/open.c:118
 ksys_truncate+0x150/0x2f0 fs/open.c:142
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x74/0xb0 fs/open.c:152
 x64_sys_call+0x1ef4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:77
 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 etype created at:
 udf_map_block+0x1b4/0x76c0 fs/udf/inode.c:425
 __udf_get_block fs/udf/inode.c:467 [inline]
 udf_get_block_wb+0x7c/0x430 fs/udf/inode.c:503

CPU: 0 UID: 0 PID: 6886 Comm: syz.3.262 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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