If errno_str() is called with an unsupported error number, do not return a random pointer but a reasonable text.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- lib/errno_str.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/lib/errno_str.c b/lib/errno_str.c index fbe56395d1..2e5f4a887d 100644 --- a/lib/errno_str.c +++ b/lib/errno_str.c @@ -136,6 +136,8 @@ static const char * const errno_message[] = { ERRNO_MSG(EDQUOT, "Quota exceeded"), ERRNO_MSG(ENOMEDIUM, "No medium found"), ERRNO_MSG(EMEDIUMTYPE, "Wrong medium type"), + /* Message for unsupported error numbers */ + ERRNO_MSG(0, "Unknown error"), };
const char *errno_str(int errno) @@ -143,5 +145,9 @@ const char *errno_str(int errno) if (errno >= 0) return errno_message[0];
- return errno_message[abs(errno)]; + errno = -errno; + if (errno >= ARRAY_SIZE(errno_message)) + errno = ARRAY_SIZE(errno_message) - 1; + + return errno_message[errno]; } -- 2.23.0