REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP
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BUG: KASAN: out-of-bounds in leaf_paste_entries+0x95f/0x13a0 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551590 at addr ffff88803c9fffa4 by task syz-executor.1/6873

CPU: 0 PID: 6873 Comm: syz-executor.1 Not tainted 6.1.20-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15f/0x4f0 mm/kasan/report.c:395
 kasan_report+0x136/0x160 mm/kasan/report.c:495
 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189
 memmove+0x25/0x60 mm/kasan/shadow.c:54
 leaf_paste_entries+0x95f/0x13a0 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+0xbd1e/0x12510 fs/reiserfs/do_balan.c:1452
 do_balance+0x309/0x8f0 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x73b/0x880 fs/reiserfs/stree.c:2159
 reiserfs_add_entry+0x9b8/0xd70 fs/reiserfs/namei.c:567
 reiserfs_mkdir+0x6bc/0x8f0 fs/reiserfs/namei.c:862
 xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
 create_privroot fs/reiserfs/xattr.c:882 [inline]
 reiserfs_xattr_init+0x348/0x730 fs/reiserfs/xattr.c:1005
 reiserfs_fill_super+0x2203/0x2620 fs/reiserfs/super.c:2175
 mount_bdev+0x26d/0x3a0 fs/super.c:1414
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1544
 do_new_mount+0x28b/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fedd8a8d62a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fedd96fdf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000000110e RCX: 00007fedd8a8d62a
RDX: 0000000020000100 RSI: 0000000020000140 RDI: 00007fedd96fdfe0
RBP: 00007fedd96fe020 R08: 00007fedd96fe020 R09: 0000000001008012
R10: 0000000001008012 R11: 0000000000000202 R12: 0000000020000100
R13: 0000000020000140 R14: 00007fedd96fdfe0 R15: 0000000020000000
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0000f27fc0 refcount:2 mapcount:0 mapping:ffff888140c554f8 index:0x213 pfn:0x3c9ff
memcg:ffff88803c266000
aops:def_blk_aops ino:700001
flags: 0xfff38000002052(referenced|lru|workingset|private|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff38000002052 ffffea0000f7d888 ffff88807a3ec158 ffff888140c554f8
raw: 0000000000000213 ffff888074e84740 00000002ffffffff ffff88803c266000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 6873, tgid 6872 (syz-executor.1), ts 326372492803, free_ts 326167810782
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x3573/0x3700 mm/page_alloc.c:4291
 __alloc_pages+0x28d/0x7e0 mm/page_alloc.c:5558
 folio_alloc+0x1a/0x50 mm/mempolicy.c:2297
 filemap_alloc_folio+0xda/0x4f0 mm/filemap.c:971
 __filemap_get_folio+0x711/0xe30 mm/filemap.c:1965
 pagecache_get_page+0x28/0x250 mm/folio-compat.c:110
 find_or_create_page include/linux/pagemap.h:613 [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+0x211/0xa20 fs/buffer.c:1333
 sb_getblk include/linux/buffer_head.h:356 [inline]
 search_by_key+0x460/0x4b60 fs/reiserfs/stree.c:672
 reiserfs_read_locked_inode+0x23c/0x2950 fs/reiserfs/inode.c:1549
 reiserfs_fill_super+0x135f/0x2620 fs/reiserfs/super.c:2071
 mount_bdev+0x26d/0x3a0 fs/super.c:1414
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1544
 do_new_mount+0x28b/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
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+0xfe1/0x1190 mm/page_alloc.c:3387
 free_unref_page_list+0x107/0x8a0 mm/page_alloc.c:3529
 release_pages+0x2836/0x2b40 mm/swap.c:1055
 __pagevec_release+0x80/0xf0 mm/swap.c:1075
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 shmem_undo_range+0x867/0x2020 mm/shmem.c:944
 shmem_truncate_range mm/shmem.c:1043 [inline]
 shmem_evict_inode+0x265/0xa60 mm/shmem.c:1152
 evict+0x2a4/0x620 fs/inode.c:664
 __dentry_kill+0x436/0x650 fs/dcache.c:607
 dentry_kill+0xbb/0x290
 dput+0x1ef/0x420 fs/dcache.c:913
 __fput+0x5e4/0x890 fs/file_table.c:328
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x60/0x2d0 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86

Memory state around the buggy address:
 ffff88803c9ffe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803c9fff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88803c9fff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff88803ca00000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803ca00080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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