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LibC: Fix OOB access in strerror() with invalid input

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Calling strerror() with a negative number should not access below the
error string array.

Found by running GCC in UE. :^)
This commit is contained in:
Andreas Kling 2020-11-14 11:23:39 +01:00
parent abe9cec612
commit a65e7db533
Notes: sideshowbarker 2024-07-19 02:28:37 +09:00
1 changed files with 1 additions and 1 deletions
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Libraries/LibC/string.cpp
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@ -372,7 +372,7 @@ int sys_nerr = EMAXERRNO;
char* strerror(int errnum)
{
if (errnum >= EMAXERRNO) {
if (errnum < 0 || errnum >= EMAXERRNO) {
printf("strerror() missing string for errnum=%d\n", errnum);
return const_cast<char*>("Unknown error");
}