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Fixed possible invalid memory access

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This commit is contained in:
Martin Tůma 2016-11-23 18:44:22 +01:00
parent 2bdab0f449
commit 1242423ca8
1 changed files with 2 additions and 2 deletions
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4
src/nmeaparser.cpp
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@ -7,10 +7,10 @@ static bool validSentence(const char *line, int len)
{ {
const char *lp; const char *lp;
if (len < 10 || line[0] != '$') if (len < 12 || line[0] != '$')
return false; return false;
for (lp = line + len - 1; lp > line; lp--) for (lp = line + len - 1; lp > line + 3; lp--)
if (!::isspace(*lp)) if (!::isspace(*lp))
break; break;
if (*(lp-2) != '*' || !::isalnum(*(lp-1)) || !::isalnum(*(lp))) if (*(lp-2) != '*' || !::isalnum(*(lp-1)) || !::isalnum(*(lp)))