syz.1.559: attempt to access beyond end of device loop1: rw=524288, sector=8, nr_sectors = 16 limit=16 syz.1.559: attempt to access beyond end of device loop1: rw=524288, sector=16, nr_sectors = 40 limit=16 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy_to_page include/linux/highmem.h:427 [inline] BUG: KASAN: slab-out-of-bounds in z_erofs_transform_plain+0x3ab/0x4a0 fs/erofs/decompressor.c:347 Read of size 4096 at addr ffff88801a2b6000 by task syz.1.559/7826 CPU: 0 PID: 7826 Comm: syz.1.559 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xa8/0x210 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x241/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 memcpy_to_page include/linux/highmem.h:427 [inline] z_erofs_transform_plain+0x3ab/0x4a0 fs/erofs/decompressor.c:347 z_erofs_decompress_pcluster fs/erofs/zdata.c:1296 [inline] z_erofs_decompress_queue+0x1705/0x2670 fs/erofs/zdata.c:1377 z_erofs_runqueue+0x1993/0x1b20 fs/erofs/zdata.c:1778 z_erofs_read_folio+0x321/0x5c0 fs/erofs/zdata.c:1863 filemap_read_folio+0x16b/0x790 mm/filemap.c:2420 filemap_update_page mm/filemap.c:2504 [inline] filemap_get_pages+0x13ac/0x1f10 mm/filemap.c:2618 filemap_read+0x409/0xf20 mm/filemap.c:2690 __kernel_read+0x2e5/0x730 fs/read_write.c:428 integrity_kernel_read+0x8a/0xd0 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+0xb1f/0x1960 security/integrity/ima/ima_crypto.c:573 ima_collect_measurement+0x4d4/0xa30 security/integrity/ima/ima_api.c:290 process_measurement+0x123a/0x1d50 security/integrity/ima/ima_main.c:370 ima_file_check+0xcc/0x110 security/integrity/ima/ima_main.c:568 do_open fs/namei.c:3642 [inline] path_openat+0x2910/0x3270 fs/namei.c:3797 do_filp_open+0x1f2/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f44a359de59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f44a4405028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f44a3825fa0 RCX: 00007f44a359de59 RDX: 00000000000c8000 RSI: 0000200000000100 RDI: ffffffffffffff9c RBP: 00007f44a3633e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f44a3826038 R14: 00007f44a3825fa0 R15: 00007ffdbd8fbeb8 Allocated by task 5138: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc+0xb7/0x240 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_commit_ok+0x29/0x1d0 security/tomoyo/memory.c:76 tomoyo_update_domain+0x4e3/0x7d0 security/tomoyo/domain.c:139 tomoyo_update_path_acl security/tomoyo/file.c:398 [inline] tomoyo_write_file+0x3d2/0xc50 security/tomoyo/file.c:1022 tomoyo_write_domain2 security/tomoyo/common.c:1144 [inline] tomoyo_add_entry security/tomoyo/common.c:2034 [inline] tomoyo_supervisor+0xdd6/0x1100 security/tomoyo/common.c:2095 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0x262/0x3a0 security/tomoyo/file.c:587 tomoyo_path_perm+0x3f0/0x560 security/tomoyo/file.c:838 security_inode_getattr+0xd3/0x120 security/security.c:2187 vfs_getattr fs/stat.c:173 [inline] vfs_statx+0x172/0x680 fs/stat.c:248 vfs_fstatat+0x12a/0x1b0 fs/stat.c:299 __do_sys_newfstatat fs/stat.c:463 [inline] __se_sys_newfstatat fs/stat.c:457 [inline] __x64_sys_newfstatat+0x149/0x1f0 fs/stat.c:457 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88801a2b6000 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of allocated 48-byte region [ffff88801a2b6000, ffff88801a2b6030) The buggy address belongs to the physical page: page:ffffea000068ad80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2b6 anon flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888017c41640 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 5138, tgid 5138 (udevadm), ts 32246024655, free_ts 32239281163 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582 prep_new_page mm/page_alloc.c:1589 [inline] get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501 alloc_slab_page+0x5d/0x180 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2d0 mm/slub.c:2081 ___slab_alloc+0xc5c/0x12f0 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] __kmem_cache_alloc_node+0x11f/0x250 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa7/0x240 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_commit_ok+0x29/0x1d0 security/tomoyo/memory.c:76 tomoyo_update_domain+0x4e3/0x7d0 security/tomoyo/domain.c:139 tomoyo_update_path_acl security/tomoyo/file.c:398 [inline] tomoyo_write_file+0x3d2/0xc50 security/tomoyo/file.c:1022 tomoyo_write_domain2 security/tomoyo/common.c:1144 [inline] tomoyo_add_entry security/tomoyo/common.c:2034 [inline] tomoyo_supervisor+0xdd6/0x1100 security/tomoyo/common.c:2095 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0x262/0x3a0 security/tomoyo/file.c:587 tomoyo_path_perm+0x3f0/0x560 security/tomoyo/file.c:838 security_inode_getattr+0xd3/0x120 security/security.c:2187 vfs_getattr fs/stat.c:173 [inline] vfs_statx+0x172/0x680 fs/stat.c:248 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1182 [inline] free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x319/0x400 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] __kmem_cache_alloc_node+0x194/0x250 mm/slub.c:3534 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098 kmalloc include/linux/slab.h:600 [inline] tomoyo_print_header security/tomoyo/audit.c:156 [inline] tomoyo_init_log+0x196/0x1f50 security/tomoyo/audit.c:255 tomoyo_supervisor+0x363/0x1100 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0x262/0x3a0 security/tomoyo/file.c:587 tomoyo_path_perm+0x3f0/0x560 security/tomoyo/file.c:838 security_inode_getattr+0xd3/0x120 security/security.c:2187 Memory state around the buggy address: ffff88801a2b5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801a2b5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801a2b6000: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff88801a2b6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ffff88801a2b6100: 00 00 00 00 00 00 00 06 fc fc fc fc fc fc fc fc ==================================================================