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ar71xx: add sanity checks to decode_rle

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Also use -EINVAL instead of -1.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31353 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2012-04-19 21:31:40 +00:00
parent 4cb60d0721
commit 9ec35a5650
1 changed files with 7 additions and 2 deletions
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9
target/linux/ar71xx/files/arch/mips/ath79/mach-rb750.c
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@ -299,24 +299,29 @@ static int decode_rle(char *output, int len, char *in)
{
char *ptr = output;
char *end = output + len;
if (!output || !in)
return -EINVAL;
while (*in) {
if (*in < 0) {
int i = -*in++;
while (i-- > 0) {
if (ptr >= end)
return -1;
return -EINVAL;
*ptr++ = *in++;
}
} else if (*in > 0) {
int i = *in++;
while (i-- > 0) {
if (ptr >= end)
return -1;
return -EINVAL;
*ptr++ = *in;
}
in++;
}
}
return ptr - output;
}