1 files changed, 11 insertions, 3 deletions

diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 45234791fec2..5fcfa96463eb 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -351,6 +351,11 @@ try_again:
         return u_len;
 }
 
+/*
+ * Convert CS0 dstring to output charset. Warning: This function may truncate
+ * input string if it is too long as it is used for informational strings only
+ * and it is better to truncate the string than to refuse mounting a media.
+ */
 int udf_dstrCS0toChar(struct super_block *sb, uint8_t *utf_o, int o_len,
                       const uint8_t *ocu_i, int i_len)
 {
@@ -359,9 +364,12 @@ int udf_dstrCS0toChar(struct super_block *sb, uint8_t *utf_o, int o_len,
         if (i_len > 0) {
                 s_len = ocu_i[i_len - 1];
                 if (s_len >= i_len) {
-                        pr_err("incorrect dstring lengths (%d/%d)\n",
-                               s_len, i_len);
-                        return -EINVAL;
+                        pr_warn("incorrect dstring lengths (%d/%d),"
+                                " truncating\n", s_len, i_len);
+                        s_len = i_len - 1;
+                        /* 2-byte encoding? Need to round properly... */
+                        if (ocu_i[0] == 16)
+                                s_len -= (s_len - 1) & 2;
                 }
         }