syzbot

executing program
BUG: memory leak
unreferenced object 0xffff888117a58b20 (size 32):
  comm "syz-executor963", pid 7131, jiffies 4294944656 (age 13.730s)
  hex dump (first 32 bytes):
    2e 00 63 75 72 69 74 79 2e 73 65 6c 69 6e 75 78  ..curity.selinux
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002c0b7c1a>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<000000002c0b7c1a>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<000000002c0b7c1a>] slab_alloc mm/slab.c:3320 [inline]
    [<000000002c0b7c1a>] __do_kmalloc mm/slab.c:3654 [inline]
    [<000000002c0b7c1a>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3671
    [<0000000002d55657>] kstrdup+0x3a/0x70 mm/util.c:60
    [<00000000271def13>] reiserfs_fill_super+0x500/0x1120 fs/reiserfs/super.c:1946
    [<000000000062cb69>] mount_bdev+0x1ce/0x210 fs/super.c:1417
    [<00000000fea02e5e>] get_super_block+0x35/0x40 fs/reiserfs/super.c:2604
    [<00000000d6fdb57e>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000007acefa69>] vfs_get_tree+0x2d/0xe0 fs/super.c:1547
    [<0000000087269e72>] do_new_mount fs/namespace.c:2822 [inline]
    [<0000000087269e72>] do_mount+0x97c/0xc80 fs/namespace.c:3142
    [<0000000075fa15ae>] __do_sys_mount fs/namespace.c:3351 [inline]
    [<0000000075fa15ae>] __se_sys_mount fs/namespace.c:3328 [inline]
    [<0000000075fa15ae>] __x64_sys_mount+0xc0/0x140 fs/namespace.c:3328
    [<000000007f4273c0>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000d5c3ac94>] entry_SYSCALL_64_after_hwframe+0x44/0xa9