loop4: detected capacity change from 0 to 16
erofs: (device loop4): mounted with root inode @ nid 36.
syz-executor.4: attempt to access beyond end of device
loop4: rw=524288, sector=1032, nr_sectors = 8 limit=16
erofs: (device loop4): z_erofs_lz4_decompress_mem: failed to decompress -32 in[46, 4050] out[4096]
=====================================================
BUG: KMSAN: uninit-value in hex_dump_to_buffer+0xae9/0x10f0 lib/hexdump.c:194
 hex_dump_to_buffer+0xae9/0x10f0 lib/hexdump.c:194
 print_hex_dump+0x13d/0x3e0 lib/hexdump.c:276
 z_erofs_lz4_decompress_mem fs/erofs/decompressor.c:252 [inline]
 z_erofs_lz4_decompress+0x257e/0x2a70 fs/erofs/decompressor.c:311
 z_erofs_decompress_pcluster fs/erofs/zdata.c:1290 [inline]
 z_erofs_decompress_queue+0x338c/0x6460 fs/erofs/zdata.c:1372
 z_erofs_runqueue+0x367a/0x3830 fs/erofs/zdata.c:1758
 z_erofs_read_folio+0x435/0x810 fs/erofs/zdata.c:1843
 filemap_read_folio+0xce/0x370 mm/filemap.c:2323
 filemap_update_page mm/filemap.c:2407 [inline]
 filemap_get_pages+0x2a57/0x2c90 mm/filemap.c:2521
 filemap_read+0x59e/0x14d0 mm/filemap.c:2593
 generic_file_read_iter+0x136/0xad0 mm/filemap.c:2781
 __kernel_read+0x3bb/0x9e0 fs/read_write.c:434
 integrity_kernel_read+0x77/0x90 security/integrity/iint.c:221
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1743/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3624 [inline]
 path_openat+0x4d05/0x5ac0 fs/namei.c:3779
 do_filp_open+0x20d/0x590 fs/namei.c:3806
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_compat_sys_open fs/open.c:1470 [inline]
 __se_compat_sys_open fs/open.c:1468 [inline]
 __ia32_compat_sys_open+0x26c/0x2c0 fs/open.c:1468
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb3/0x110 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4591
 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
 alloc_pages mm/mempolicy.c:2204 [inline]
 folio_alloc+0x1da/0x380 mm/mempolicy.c:2211
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:974
 page_cache_ra_unbounded+0x2cc/0x960 mm/readahead.c:247
 do_page_cache_ra mm/readahead.c:299 [inline]
 page_cache_ra_order+0xfeb/0x10a0 mm/readahead.c:546
 ondemand_readahead+0x132b/0x1710 mm/readahead.c:668
 page_cache_sync_ra+0x724/0x760 mm/readahead.c:695
 page_cache_sync_readahead include/linux/pagemap.h:1283 [inline]
 filemap_get_pages+0x4c7/0x2c90 mm/filemap.c:2497
 filemap_read+0x59e/0x14d0 mm/filemap.c:2593
 generic_file_read_iter+0x136/0xad0 mm/filemap.c:2781
 __kernel_read+0x3bb/0x9e0 fs/read_write.c:434
 integrity_kernel_read+0x77/0x90 security/integrity/iint.c:221
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1743/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3624 [inline]
 path_openat+0x4d05/0x5ac0 fs/namei.c:3779
 do_filp_open+0x20d/0x590 fs/namei.c:3806
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_compat_sys_open fs/open.c:1470 [inline]
 __se_compat_sys_open fs/open.c:1468 [inline]
 __ia32_compat_sys_open+0x26c/0x2c0 fs/open.c:1468
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb3/0x110 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

CPU: 1 PID: 5254 Comm: syz-executor.4 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
=====================================================