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Xslt: fix handling of vsnprintf() return value

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Boris Tonofa 2025-06-20 18:16:16 +03:00 • committed by Sergey Kandaurov
parent 1c387799ca
commit ac4bedfafe
1 changed files with 13 additions and 3 deletions
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16
src/http/modules/ngx_http_xslt_filter_module.c
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@ -465,7 +465,7 @@ ngx_http_xslt_sax_error(void *data, const char *msg, ...)
{
xmlParserCtxtPtr ctxt = data;
size_t n;
int n;
va_list args;
ngx_http_xslt_filter_ctx_t *ctx;
u_char buf[NGX_MAX_ERROR_STR];
@ -475,13 +475,23 @@ ngx_http_xslt_sax_error(void *data, const char *msg, ...)
buf[0] = '\0';
va_start(args, msg);
n = (size_t) vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args);
n = vsnprintf((char *) buf, NGX_MAX_ERROR_STR, msg, args);
va_end(args);
if (n <= 0) {
ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, ngx_errno,
"libxml2 error");
return;
}
if (n > NGX_MAX_ERROR_STR) {
n = NGX_MAX_ERROR_STR;
}
while (--n && (buf[n] == CR || buf[n] == LF)) { /* void */ }
ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
"libxml2 error: \"%*s\"", n + 1, buf);
"libxml2 error: \"%*s\"", (size_t) (n + 1), buf);
}