REISERFS warning (device loop4): jdm-13090 reiserfs_new_inode: ACLs aren't enabled in the fs, but vfs thinks they are!
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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 ffff00012fac6fc4 by task syz-executor.4/5398

CPU: 1 PID: 5398 Comm: syz-executor.4 Not tainted 5.15.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load_n_noabort+0x40/0x4c mm/kasan/report_generic.c:319
 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+0x2a8/0x1624 fs/reiserfs/namei.c:322
 reiserfs_add_entry+0x604/0xc8c fs/reiserfs/namei.c:511
 reiserfs_mkdir+0x588/0x77c fs/reiserfs/namei.c:862
 xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
 create_privroot fs/reiserfs/xattr.c:889 [inline]
 reiserfs_xattr_init+0x2b0/0x6dc fs/reiserfs/xattr.c:1012
 reiserfs_fill_super+0x1b28/0x1e8c fs/reiserfs/super.c:2179
 mount_bdev+0x274/0x370 fs/super.c:1387
 get_super_block+0x44/0x58 fs/reiserfs/super.c:2608
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
 vfs_get_tree+0x90/0x274 fs/super.c:1517
 do_new_mount+0x25c/0x8c4 fs/namespace.c:2994
 path_mount+0x590/0x104c fs/namespace.c:3324
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount fs/namespace.c:3522 [inline]
 __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:0000000042699cfc refcount:1 mapcount:1 mapping:0000000000000000 index:0x20119 pfn:0x16fac6
memcg:ffff0000cb8bc000
anon flags: 0x5ffc00000080814(uptodate|lru|arch_1|swapbacked|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000080814 fffffc0004beb148 fffffc0004beaa48 ffff00012cda4aa1
raw: 0000000000020119 0000000000000000 0000000100000000 ffff0000cb8bc000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00012fac6e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff00012fac6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff00012fac6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                           ^
 ffff00012fac7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff00012fac7080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage.