=====================================================
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_reschedule_ipi+0x74/0x80 arch/x86/kernel/smp.c:249
 asm_sysvec_reschedule_ipi+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
 inode_getblk fs/udf/inode.c:-1 [inline]
 udf_map_block+0x184a/0x76c0 fs/udf/inode.c:453
 udf_bread+0xfa/0x840 fs/udf/inode.c:1248
 udf_fiiter_append_blk+0x45b/0xdf0 fs/udf/directory.c:478
 udf_fiiter_add_entry+0x18ae/0x2a10 fs/udf/namei.c:284
 udf_mkdir+0x13b/0x7a0 fs/udf/namei.c:438
 vfs_mkdir+0x653/0x9f0 fs/namei.c:5271
 filename_mkdirat+0x42f/0xa60 fs/namei.c:5304
 __do_sys_mkdirat fs/namei.c:5325 [inline]
 __se_sys_mkdirat+0x82/0x330 fs/namei.c:5322
 __x64_sys_mkdirat+0x97/0xe0 fs/namei.c:5322
 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 etype.i created at:
 inode_getblk fs/udf/inode.c:734 [inline]
 udf_map_block+0x866/0x76c0 fs/udf/inode.c:453
 udf_bread+0xfa/0x840 fs/udf/inode.c:1248

CPU: 1 UID: 0 PID: 7411 Comm: syz.4.159 Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
=====================================================