REISERFS (device loop2): Using tea hash to sort names REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage. ================================================================== BUG: KASAN: out-of-bounds in leaf_cut_from_buffer+0x1546/0x2600 fs/reiserfs/lbalance.c:1210 Read of size 18446744073709551484 at addr ffff888060a64000 by task syz.2.637/8624 CPU: 0 PID: 8624 Comm: syz.2.637 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27b/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 leaf_cut_from_buffer+0x1546/0x2600 fs/reiserfs/lbalance.c:1210 leaf_move_items+0xaab/0xde0 fs/reiserfs/lbalance.c:729 leaf_shift_right+0x2a/0xe0 fs/reiserfs/lbalance.c:803 balance_leaf_paste_right_shift fs/reiserfs/do_balan.c:789 [inline] balance_leaf_paste_right fs/reiserfs/do_balan.c:897 [inline] balance_leaf_right fs/reiserfs/do_balan.c:916 [inline] balance_leaf+0xb4cb/0x10e60 fs/reiserfs/do_balan.c:1415 do_balance+0x2fa/0x930 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x69b/0x7e0 fs/reiserfs/stree.c:2159 reiserfs_get_block+0x1bdc/0x3ef0 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991 reiserfs_write_begin+0x206/0x4c0 fs/reiserfs/inode.c:2775 generic_perform_write+0x2db/0x560 mm/filemap.c:3846 __generic_file_write_iter+0x172/0x430 mm/filemap.c:3974 generic_file_write_iter+0xab/0x2e0 mm/filemap.c:4006 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x44c/0x960 fs/read_write.c:584 ksys_write+0x143/0x240 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f06d498ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f06d5835038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f06d4bc6090 RCX: 00007f06d498ebe9 RDX: 0000000000010448 RSI: 0000200000000080 RDI: 000000000000000a RBP: 00007f06d4a11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f06d4bc6128 R14: 00007f06d4bc6090 R15: 00007ffd4e4de0e8 The buggy address belongs to the physical page: page:ffffea0001829900 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x60a64 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001829948 ffffea0001b00ac8 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 8614, tgid 8611 (syz.1.636), ts 420609174867, free_ts 421541415846 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292 filemap_alloc_folio+0xdb/0x460 mm/filemap.c:999 __filemap_get_folio+0x697/0xdd0 mm/filemap.c:1993 pagecache_get_page+0x26/0x250 mm/folio-compat.c:110 find_or_create_page include/linux/pagemap.h:646 [inline] grow_dev_page fs/buffer.c:946 [inline] grow_buffers fs/buffer.c:1011 [inline] __getblk_slow fs/buffer.c:1038 [inline] __getblk_gfp+0x2d8/0xb20 fs/buffer.c:1333 __getblk include/linux/buffer_head.h:411 [inline] reiserfs_breada fs/reiserfs/journal.c:2338 [inline] journal_read+0x7ff/0x3a20 fs/reiserfs/journal.c:2451 journal_init+0x1a08/0x2450 fs/reiserfs/journal.c:2899 reiserfs_fill_super+0xe91/0x2340 fs/reiserfs/super.c:2022 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3069 do_mount fs/namespace.c:3412 [inline] __do_sys_mount fs/namespace.c:3620 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3597 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525 release_pages+0x1f92/0x2200 mm/swap.c:1035 __pagevec_release+0x6d/0xe0 mm/swap.c:1055 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x2f6/0xff0 mm/truncate.c:372 kill_bdev block/bdev.c:76 [inline] blkdev_flush_mapping+0x12c/0x290 block/bdev.c:664 blkdev_put_whole block/bdev.c:695 [inline] blkdev_put+0x47f/0x710 block/bdev.c:955 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182 task_work_run+0x1ca/0x250 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff888060a63f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888060a63f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888060a64000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888060a64080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888060a64100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================