REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using rupasov hash to sort names
==================================================================
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+0xc7e/0xf50 fs/reiserfs/namei.c:164
Read of size 4 at addr ffff88808b517714 by task syz-executor653/8004

CPU: 1 PID: 8004 Comm: syz-executor653 Not tainted 4.14.296-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load_n_noabort+0x6b/0x80 mm/kasan/report.c:440
 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline]
 search_by_entry_key+0xc7e/0xf50 fs/reiserfs/namei.c:164
 reiserfs_find_entry.part.0+0x138/0x11e0 fs/reiserfs/namei.c:321
 reiserfs_find_entry fs/reiserfs/namei.c:367 [inline]
 reiserfs_lookup+0x1fd/0x400 fs/reiserfs/namei.c:367
 lookup_real fs/namei.c:1555 [inline]
 __lookup_hash fs/namei.c:1575 [inline]
 __lookup_hash+0x1bb/0x270 fs/namei.c:1563
 lookup_one_len+0x279/0x3a0 fs/namei.c:2539
 reiserfs_lookup_privroot+0x92/0x270 fs/reiserfs/xattr.c:970
 reiserfs_fill_super+0x1d12/0x2990 fs/reiserfs/super.c:2187
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fcbe732140a
RSP: 002b:00007fff96bc4428 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fcbe732140a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff96bc4440
RBP: 00007fff96bc4440 R08: 00007fff96bc4480 R09: 00005555574b22c0
R10: 0000000000200080 R11: 0000000000000286 R12: 0000000000000004
R13: 00007fff96bc4480 R14: 0000000000000006 R15: 0000000020000350

The buggy address belongs to the page:
page:ffffea00022d45c0 count:0 mapcount:-127 mapping:          (null) index:0x1
flags: 0xfff00000000000()
raw: 00fff00000000000 0000000000000000 0000000000000001 00000000ffffff80
raw: ffff88813fffb7d0 ffffea00022ef420 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808b517600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88808b517680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88808b517700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff88808b517780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88808b517800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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