loop6: detected capacity change from 0 to 128
UDF-fs: error (device loop6): udf_read_tagged: read failed, block=256, location=256
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
=====================================================
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
 __preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
 rcu_read_lock_sched include/linux/rcupdate.h:933 [inline]
 pfn_valid include/linux/mmzone.h:2281 [inline]
 kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:94 [inline]
 virt_to_page_or_null+0xb3/0x170 mm/kmsan/shadow.c:75
 kmsan_get_metadata+0xf1/0x160 mm/kmsan/shadow.c:141
 is_bad_asm_addr mm/kmsan/instrumentation.c:27 [inline]
 __msan_instrument_asm_store+0x91/0xd0 mm/kmsan/instrumentation.c:122
 arch_atomic64_add_return arch/x86/include/asm/atomic64_64.h:79 [inline]
 raw_atomic64_add_return_release include/linux/atomic/atomic-arch-fallback.h:2749 [inline]
 raw_atomic_long_add_return_release include/linux/atomic/atomic-long.h:184 [inline]
 atomic_long_add_return_release include/linux/atomic/atomic-instrumented.h:3317 [inline]
 __up_read kernel/locking/rwsem.c:1388 [inline]
 up_read+0x3f/0xf0 kernel/locking/rwsem.c:1671
 udf_map_block+0x59f/0x76c0 fs/udf/inode.c:439
 __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_file_write_iter+0x47c/0xdb0 fs/udf/file.c:106
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0xbe1/0x15c0 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:800
 x64_sys_call+0xbef/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:19
 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: 1 UID: 0 PID: 11093 Comm: syz.6.497 Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
=====================================================