Erik Faye-Lund <kusmabite@xxxxxxxxx> writes:
> diff --git a/compat/win32/syslog.c b/compat/win32/syslog.c
> index d015e43..0641f4e 100644
> --- a/compat/win32/syslog.c
> +++ b/compat/win32/syslog.c
> @@ -43,11 +43,14 @@ void syslog(int priority, const char *fmt, ...)
> va_end(ap);
>
> while ((pos = strstr(str, "%1")) != NULL) {
> - str = realloc(str, ++str_len + 1);
> - if (!str) {
> + char *tmp = realloc(str, ++str_len + 1);
> + if (!tmp) {
> warning("realloc failed: '%s'", strerror(errno));
> + free(str);
> return;
> }
> + pos = tmp + (pos - str);
Pedantically, this is undefined (uses of both pos and str may trap after
realloc has freed the original pointer), it is better to calculate the
difference before calling realloc.
Andreas.
--
Andreas Schwab, schwab@xxxxxxxxxxxxxx
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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