BUG: memory leak
unreferenced object 0xffff88811a4f0420 (size 32):
  comm "syz-executor451", pid 7123, jiffies 4294945039 (age 12.490s)
  hex dump (first 32 bytes):
    00 66 73 00 00 00 00 00 00 00 00 00 00 00 00 00  .fs.............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000038a1e257>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000004569ef95>] nfs23_parse_monolithic fs/nfs/fs_context.c:958 [inline]
    [<000000004569ef95>] nfs_fs_context_parse_monolithic+0x5cf/0x8f0 fs/nfs/fs_context.c:1147
    [<00000000c65c94c7>] do_new_mount fs/namespace.c:2818 [inline]
    [<00000000c65c94c7>] do_mount+0x927/0xc50 fs/namespace.c:3107
    [<000000007efcc50a>] __do_sys_mount fs/namespace.c:3316 [inline]
    [<000000007efcc50a>] __se_sys_mount fs/namespace.c:3293 [inline]
    [<000000007efcc50a>] __x64_sys_mount+0xb0/0x120 fs/namespace.c:3293
    [<000000005ed2c173>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294
    [<00000000078b81bb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9