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Fix an out of bounds array access.

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We were looking at Magic[5] without checking Length. Since this path would not
return unless Length >= 18 anyway, just move the >= 18 check up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183666 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2013-06-10 15:22:18 +00:00
parent 91de80a535
commit b972457783
1 changed files with 3 additions and 2 deletions
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5
lib/Support/Path.cpp
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@ -58,11 +58,12 @@ sys::identifyFileType(const char *Magic, unsigned Length) {
break;
case '\177':
if (Magic[1] == 'E' && Magic[2] == 'L' && Magic[3] == 'F') {
if (Length >= 18 && Magic[1] == 'E' && Magic[2] == 'L' &&
Magic[3] == 'F') {
bool Data2MSB = Magic[5] == 2;
unsigned high = Data2MSB ? 16 : 17;
unsigned low = Data2MSB ? 17 : 16;
if (Length >= 18 && Magic[high] == 0)
if (Magic[high] == 0)
switch (Magic[low]) {
default: break;
case 1: return ELF_Relocatable_FileType;