1 files changed, 16 insertions, 2 deletions

diff --git a/fs/fs_parser.c b/fs/fs_parser.c
index 460ea4206fa2..d1930adce68d 100644
--- a/fs/fs_parser.c
+++ b/fs/fs_parser.c
@@ -204,9 +204,23 @@ int fs_parse(struct fs_context *fc,
                 goto okay;
 
         case fs_param_is_fd: {
-                if (param->type != fs_value_is_file)
+                switch (param->type) {
+                case fs_value_is_string:
+                        if (!result->has_value)
+                                goto bad_value;
+
+                        ret = kstrtouint(param->string, 0, &result->uint_32);
+                        break;
+                case fs_value_is_file:
+                        result->uint_32 = param->dirfd;
+                        ret = 0;
+                default:
                         goto bad_value;
-                goto okay;
+                }
+
+                if (result->uint_32 > INT_MAX)
+                        goto bad_value;
+                goto maybe_okay;
         }
 
         case fs_param_is_blockdev: