loop4: detected capacity change from 0 to 4096
=====================================================
BUG: KMSAN: uninit-value in ntfs_iomap_begin+0x8c0/0x1460 fs/ntfs3/inode.c:825
 ntfs_iomap_begin+0x8c0/0x1460 fs/ntfs3/inode.c:825
 iomap_iter+0x9b7/0x1540 fs/iomap/iter.c:110
 iomap_readahead+0xa98/0x1110 fs/iomap/buffered-io.c:653
 ntfs_readahead+0x26f/0x290 fs/ntfs3/inode.c:721
 read_pages+0x15c/0xe40 mm/readahead.c:163
 page_cache_ra_unbounded+0xd0e/0x1080 mm/readahead.c:304
 do_page_cache_ra mm/readahead.c:334 [inline]
 page_cache_ra_order+0x1411/0x16f0 mm/readahead.c:538
 page_cache_sync_ra+0xb96/0x11b0 mm/readahead.c:629
 filemap_get_pages+0xcb2/0x3d30 mm/filemap.c:2690
 filemap_read+0x5d2/0x2300 mm/filemap.c:2800
 generic_file_read_iter+0x10c/0xae0 mm/filemap.c:2992
 ntfs_file_read_iter+0x91f/0x13b0 fs/ntfs3/file.c:857
 __kernel_read+0x7e0/0xe20 fs/read_write.c:532
 integrity_kernel_read+0x77/0x90 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0x1795/0x4030 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x463/0xe80 security/integrity/ima/ima_api.c:294
 process_measurement+0x2d10/0x4170 security/integrity/ima/ima_main.c:407
 ima_file_check+0x91/0xd0 security/integrity/ima/ima_main.c:667
 security_file_post_open+0xbb/0x510 security/security.c:2652
 do_open fs/namei.c:4673 [inline]
 path_openat+0x587d/0x64c0 fs/namei.c:4830
 do_file_open+0x2aa/0x680 fs/namei.c:4859
 do_sys_openat2+0x163/0x380 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_compat_sys_openat fs/open.c:1434 [inline]
 __se_compat_sys_openat fs/open.c:1432 [inline]
 __ia32_compat_sys_openat+0x238/0x300 fs/open.c:1432
 ia32_sys_call+0x330b/0x4360 arch/x86/include/generated/asm/syscalls_32.h:296
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Local variable lcn created at:
 ntfs_iomap_begin+0x15d/0x1460 fs/ntfs3/inode.c:786
 iomap_iter+0x9b7/0x1540 fs/iomap/iter.c:110

CPU: 1 UID: 0 PID: 12116 Comm: syz.4.2453 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
=====================================================