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ipp2p: add boundary check in search_all_kazaa

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To avoid underflow on "end - 18", we must check for plen >= 18.
This commit is contained in:
Jan Engelhardt
2009-01-10 06:11:13 +01:00
parent 879e964f60
commit 4cdfd49637
1 changed files with 4 additions and 0 deletions
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4
extensions/xt_ipp2p.c
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@@ -623,6 +623,10 @@ search_all_kazaa(const unsigned char *payload, const unsigned int plen)
if (memcmp(payload, "GET /", 5) != 0)
return 0;
if (plen < 18)
/* The next tests would not succeed anyhow. */
return 0;
end = plen - 18;
rem = plen - 5;
for (c = 5; c < end; ++c, --rem) {