REISERFS (device loop4): checking transaction log (loop4)
REISERFS (device loop4): Using r5 hash to sort names
REISERFS (device loop4): using 3.5.x disk format
==================================================================
BUG: KASAN: use-after-free in bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline]
BUG: KASAN: use-after-free in search_by_entry_key+0x45c/0xe88 fs/reiserfs/namei.c:165
Read of size 4 at addr ffff000136489f94 by task syz-executor.4/15226

CPU: 0 PID: 15226 Comm: syz-executor.4 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:475
 kasan_report+0xd8/0x138 mm/kasan/report.c:588
 __asan_report_load_n_noabort+0x1c/0x28 mm/kasan/report_generic.c:391
 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline]
 search_by_entry_key+0x45c/0xe88 fs/reiserfs/namei.c:165
 reiserfs_find_entry+0x288/0x149c fs/reiserfs/namei.c:322
 reiserfs_lookup+0x17c/0x45c fs/reiserfs/namei.c:368
 __lookup_slow+0x250/0x374 fs/namei.c:1694
 lookup_one_len+0x178/0x28c fs/namei.c:2746
 reiserfs_lookup_privroot+0x8c/0x184 fs/reiserfs/xattr.c:977
 reiserfs_fill_super+0x1bc0/0x2028 fs/reiserfs/super.c:2174
 mount_bdev+0x1e8/0x2b4 fs/super.c:1629
 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x288 fs/super.c:1750
 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335
 path_mount+0x590/0xe04 fs/namespace.c:3662
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount fs/namespace.c:3861 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

The buggy address belongs to the physical page:
page:00000000336d5419 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x176489
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000136489e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff000136489f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff000136489f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff00013648a000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff00013648a080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 -553648127 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
REISERFS error (device loop4): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop4): Remounting filesystem read-only
REISERFS error (device loop4): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [2 -553648127 0x0 SD] stat data
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 -553648127 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
REISERFS error (device loop4): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop4): zam-7001 reiserfs_find_entry: io error
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 -553648127 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
REISERFS error (device loop4): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop4): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [2 -553648127 0x0 SD] stat data
REISERFS warning (device loop4): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.