REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [3 7 0x0 SD] (nlink == 2) not found (pos 2)
==================================================================
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+0x458/0xe34 fs/reiserfs/namei.c:165
Read of size 4 at addr ffff0000e0502104 by task syz.0.367/5781

CPU: 1 PID: 5781 Comm: syz.0.367 Not tainted 5.15.187-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x78/0x30c mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xec/0x15c 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+0x458/0xe34 fs/reiserfs/namei.c:165
 reiserfs_find_entry+0x26c/0x1390 fs/reiserfs/namei.c:322
 reiserfs_lookup+0x15c/0x378 fs/reiserfs/namei.c:368
 __lookup_slow+0x24c/0x380 fs/namei.c:1663
 lookup_one_len+0x178/0x28c fs/namei.c:2718
 open_xa_dir+0x354/0x57c fs/reiserfs/xattr.c:162
 xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:395
 reiserfs_xattr_set_handle+0xd8/0xb34 fs/reiserfs/xattr.c:540
 reiserfs_xattr_set+0x388/0x4a8 fs/reiserfs/xattr.c:640
 trusted_set+0x98/0xec fs/reiserfs/xattr_trusted.c:31
 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216
 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
 vfs_setxattr+0x158/0x2ac fs/xattr.c:303
 do_setxattr fs/xattr.c:588 [inline]
 setxattr+0x248/0x2ac fs/xattr.c:611
 path_setxattr+0x12c/0x25c fs/xattr.c:630
 __do_sys_setxattr fs/xattr.c:646 [inline]
 __se_sys_setxattr fs/xattr.c:642 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642
 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:0000000029f4b7fc refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x120502
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc00038140c8 fffffc0003814048 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e0502000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e0502080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000e0502100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000e0502180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e0502200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [3 7 0x0 SD] (nlink == 3) not found (pos 3)