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utf8: make sure to honor the array length properly

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Right now the input side can give partial utf8 input, and that showed
that we didn't properly handle that case.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2012-07-10 17:56:53 -07:00
parent 3c7bd9a7d2
commit 3abd3dba42
1 changed files with 2 additions and 2 deletions
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utf8.c
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@ -41,13 +41,13 @@ unsigned utf8_to_unicode(char *line, unsigned index, unsigned len, unicode_t *re
/* Invalid? Do it as a single byte Latin1 */ /* Invalid? Do it as a single byte Latin1 */
if (bytes > 6) if (bytes > 6)
return 1; return 1;
if (bytes > len)
return 1;
value = c & (mask-1); value = c & (mask-1);
/* Ok, do the bytes */ /* Ok, do the bytes */
for (i = 1; i < bytes; i++) { for (i = 1; i < bytes; i++) {
if (i > len)
return 1;
c = line[i]; c = line[i];
if ((c & 0xc0) != 0x80) if ((c & 0xc0) != 0x80)
return 1; return 1;