loop1: detected capacity change from 0 to 1024
=====================================================
BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline]
BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x7cb/0x990 fs/hfsplus/extents.c:191
 __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline]
 __hfsplus_ext_cache_extent+0x7cb/0x990 fs/hfsplus/extents.c:191
 hfsplus_file_truncate+0x7a3/0xfc0 fs/hfsplus/extents.c:597
 hfsplus_file_release+0x146/0x760 fs/hfsplus/inode.c:235
 __fput+0x608/0x1040 fs/file_table.c:468
 ____fput+0x25/0x30 fs/file_table.c:496
 task_work_run+0x206/0x2b0 kernel/task_work.c:227
 get_signal+0x139/0x2a20 kernel/signal.c:2807
 arch_do_signal_or_restart+0x53/0xbf0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0xec/0x330 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 __do_fast_syscall_32+0x12a/0x150 arch/x86/entry/syscall_32.c:309
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4197 [inline]
 slab_alloc_node mm/slub.c:4240 [inline]
 __do_kmalloc_node mm/slub.c:4375 [inline]
 __kmalloc_noprof+0x95f/0x1310 mm/slub.c:4388
 kmalloc_noprof include/linux/slab.h:909 [inline]
 hfsplus_find_init+0x90/0x1d0 fs/hfsplus/bfind.c:21
 hfsplus_ext_write_extent_locked fs/hfsplus/extents.c:136 [inline]
 hfsplus_ext_write_extent+0x114/0x1f0 fs/hfsplus/extents.c:150
 hfsplus_write_inode+0x3a/0x960 fs/hfsplus/super.c:155
 write_inode fs/fs-writeback.c:1525 [inline]
 __writeback_single_inode+0x892/0x1190 fs/fs-writeback.c:1745
 writeback_single_inode+0x30f/0x960 fs/fs-writeback.c:1801
 sync_inode_metadata+0xa4/0xe0 fs/fs-writeback.c:2884
 hfsplus_file_fsync+0x149/0x9a0 fs/hfsplus/inode.c:318
 vfs_fsync_range+0x19e/0x240 fs/sync.c:187
 generic_write_sync include/linux/fs.h:3043 [inline]
 generic_file_write_iter+0x580/0x980 mm/filemap.c:4322
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0xbe2/0x15d0 fs/read_write.c:686
 ksys_write fs/read_write.c:738 [inline]
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __ia32_sys_write+0x1f9/0x4d0 fs/read_write.c:746
 ia32_sys_call+0x35bc/0x4310 arch/x86/include/generated/asm/syscalls_32.h:5
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 0 UID: 0 PID: 8475 Comm: syz.1.611 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
=====================================================