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LibC: Let strerror_r fail if errnum < 0

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Jelle Raaijmakers 2021-06-11 12:02:26 +02:00 • committed by Andreas Kling
parent 90e229c9b5
commit 33c3c32a38
1 changed files with 1 additions and 1 deletions
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2
Userland/Libraries/LibC/string.cpp
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@ -357,7 +357,7 @@ int sys_nerr = EMAXERRNO;
int strerror_r(int errnum, char* buf, size_t buflen) int strerror_r(int errnum, char* buf, size_t buflen)
{ {
auto saved_errno = errno; auto saved_errno = errno;
if (errnum >= EMAXERRNO) { if (errnum < 0 || errnum >= EMAXERRNO) {
auto rc = strlcpy(buf, "unknown error", buflen); auto rc = strlcpy(buf, "unknown error", buflen);
if (rc >= buflen) if (rc >= buflen)
dbgln("strerror_r(): Invalid error number '{}' specified and the output buffer is too small.", errnum); dbgln("strerror_r(): Invalid error number '{}' specified and the output buffer is too small.", errnum);