SQUASHFS error: Failed to read block 0x4e8: -5
=====================================================
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]
BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:330 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0xef3/0x33f0 lib/iov_iter.c:185
 instrument_copy_to_user include/linux/instrumented.h:114 [inline]
 copy_to_user_iter lib/iov_iter.c:24 [inline]
 iterate_ubuf include/linux/iov_iter.h:30 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
 iterate_and_advance include/linux/iov_iter.h:330 [inline]
 _copy_to_iter+0xef3/0x33f0 lib/iov_iter.c:185
 copy_page_to_iter+0x482/0x910 lib/iov_iter.c:362
 copy_folio_to_iter include/linux/uio.h:204 [inline]
 filemap_read+0xcfd/0x2300 mm/filemap.c:2799
 generic_file_read_iter+0x10c/0xae0 mm/filemap.c:2940
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x8ed/0xf90 fs/read_write.c:572
 ksys_read fs/read_write.c:715 [inline]
 __do_sys_read fs/read_write.c:724 [inline]
 __se_sys_read fs/read_write.c:722 [inline]
 __x64_sys_read+0x1fb/0x4d0 fs/read_write.c:722
 x64_sys_call+0x2f9c/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:5206
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
 alloc_pages_noprof mm/mempolicy.c:2507 [inline]
 folio_alloc_noprof+0x109/0x360 mm/mempolicy.c:2517
 filemap_alloc_folio_noprof+0x9d/0x420 mm/filemap.c:1020
 ractl_alloc_folio mm/readahead.c:189 [inline]
 page_cache_ra_unbounded+0x593/0xfb0 mm/readahead.c:275
 do_page_cache_ra mm/readahead.c:332 [inline]
 page_cache_ra_order+0x13ec/0x1650 mm/readahead.c:535
 page_cache_sync_ra+0x10a2/0x1610 mm/readahead.c:626
 filemap_get_pages+0xcb3/0x3ce0 mm/filemap.c:2638
 filemap_read+0x5d2/0x2300 mm/filemap.c:2748
 generic_file_read_iter+0x10c/0xae0 mm/filemap.c:2940
 __kernel_read+0x7e1/0xe20 fs/read_write.c:530
 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+0x17cb/0x4050 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x45d/0xe50 security/integrity/ima/ima_api.c:293
 process_measurement+0x2d1a/0x40e0 security/integrity/ima/ima_main.c:405
 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:633
 security_file_post_open+0xbf/0x530 security/security.c:3199
 do_open fs/namei.c:3977 [inline]
 path_openat+0x5ac3/0x6760 fs/namei.c:4134
 do_filp_open+0x280/0x660 fs/namei.c:4161
 do_sys_openat2+0x1bb/0x2f0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_open fs/open.c:1460 [inline]
 __se_sys_open fs/open.c:1456 [inline]
 __x64_sys_open+0x219/0x2c0 fs/open.c:1456
 x64_sys_call+0x1843/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:3
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Bytes 10-4095 of 4096 are uninitialized
Memory access of size 4096 starts at ffff888055ce2000
Data copied to user address 0000200000000340

CPU: 1 UID: 0 PID: 13180 Comm: syz.3.1879 Tainted: G        W           syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
=====================================================