loop2: detected capacity change from 0 to 1024
=====================================================
BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:170 [inline]
BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x8c2/0x990 fs/hfsplus/extents.c:191
 __hfsplus_ext_read_extent fs/hfsplus/extents.c:170 [inline]
 __hfsplus_ext_cache_extent+0x8c2/0x990 fs/hfsplus/extents.c:191
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x7b5/0x1df0 fs/hfsplus/extents.c:459
 hfsplus_get_block+0xfc3/0x1a20 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa73/0x3030 fs/buffer.c:2145
 block_write_begin fs/buffer.c:2256 [inline]
 cont_write_begin+0x10e1/0x1bc0 fs/buffer.c:2594
 hfsplus_write_begin+0x85/0x130 fs/hfsplus/inode.c:48
 generic_perform_write+0x365/0x1050 mm/filemap.c:4175
 __generic_file_write_iter+0x213/0x460 mm/filemap.c:4292
 generic_file_write_iter+0x131/0x980 mm/filemap.c:4318
 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]
 __x64_sys_write+0x1fb/0x4d0 fs/read_write.c:746
 x64_sys_call+0x3014/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable __shash_desc created at:
 ima_calc_field_array_hash_tfm+0x49/0x8b0 security/integrity/ima/ima_crypto.c:582
 ima_calc_field_array_hash+0x478/0x660 security/integrity/ima/ima_crypto.c:651

CPU: 0 UID: 0 PID: 7101 Comm: syz.2.287 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
=====================================================