REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): using 3.5.x disk format ================================================================== BUG: KASAN: out-of-bounds in leaf_paste_entries+0x7cb/0x1140 fs/reiserfs/lbalance.c:1377 Read of size 18446744073709551584 at addr ffff88805fc18fa4 by task syz.0.17/5039 CPU: 0 PID: 5039 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x235/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 leaf_paste_entries+0x7cb/0x1140 fs/reiserfs/lbalance.c:1377 balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline] balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline] balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline] balance_leaf+0xc14c/0x10ec0 fs/reiserfs/do_balan.c:1452 do_balance+0x318/0x930 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x744/0x7f0 fs/reiserfs/stree.c:2159 reiserfs_add_entry+0x9bd/0xd80 fs/reiserfs/namei.c:567 reiserfs_mkdir+0x6be/0x920 fs/reiserfs/namei.c:862 xattr_mkdir fs/reiserfs/xattr.c:76 [inline] create_privroot fs/reiserfs/xattr.c:889 [inline] reiserfs_xattr_init+0x33a/0x720 fs/reiserfs/xattr.c:1012 reiserfs_fill_super+0x1cd9/0x2120 fs/reiserfs/super.c:2179 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb4f3fb718a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fb4f3618e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb4f3618ee0 RCX: 00007fb4f3fb718a RDX: 00002000000000c0 RSI: 0000200000000140 RDI: 00007fb4f3618ea0 RBP: 00002000000000c0 R08: 00007fb4f3618ee0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000140 R13: 00007fb4f3618ea0 R14: 0000000000001117 R15: 00002000000001c0 The buggy address belongs to the page: page:ffffea00017f0600 refcount:2 mapcount:0 mapping:ffff888017095af8 index:0x213 pfn:0x5fc18 memcg:ffff88801858c000 aops:def_blk_aops ino:700000 flags: 0xfff00000002032(referenced|lru|active|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002032 ffffea00017c8248 ffff88801bf03030 ffff888017095af8 raw: 0000000000000213 ffff88807434ecb0 00000002ffffffff ffff88801858c000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), pid 5039, ts 106907404447, free_ts 106901264432 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x24f6/0x2670 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 __page_cache_alloc+0xce/0x440 mm/filemap.c:1022 pagecache_get_page+0x9b8/0xf20 mm/filemap.c:1940 find_or_create_page include/linux/pagemap.h:420 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x240/0xb20 fs/buffer.c:1336 sb_getblk include/linux/buffer_head.h:361 [inline] search_by_key+0x474/0x4400 fs/reiserfs/stree.c:672 reiserfs_read_locked_inode+0x195/0x24c0 fs/reiserfs/inode.c:1557 reiserfs_fill_super+0x1126/0x2120 fs/reiserfs/super.c:2075 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page_list+0x119/0x830 mm/page_alloc.c:3433 release_pages+0x185f/0x1bd0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:50 [inline] tlb_flush_mmu_free mm/mmu_gather.c:241 [inline] tlb_flush_mmu mm/mmu_gather.c:248 [inline] tlb_finish_mmu+0x1b4/0x370 mm/mmu_gather.c:371 unmap_region+0x344/0x3b0 mm/mmap.c:2669 __do_munmap+0xa29/0xe10 mm/mmap.c:2899 __vm_munmap+0x13f/0x240 mm/mmap.c:2952 __do_sys_munmap mm/mmap.c:2978 [inline] __se_sys_munmap mm/mmap.c:2974 [inline] __x64_sys_munmap+0x67/0x70 mm/mmap.c:2974 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff88805fc18e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805fc18f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805fc18f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88805fc19000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805fc19080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================