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security: fix format string vulnerability in hook.h example code

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Input Validation: Low

The documentation example code in hook.h passed the msg parameter
directly as the format string to printf() and fprintf(). If copied
by developers, this pattern creates a format string vulnerability
where specially crafted msg content with format specifiers (%x, %n,
etc.) could read/write memory. Use "%s" as the format string and
pass msg as a data argument instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Wim Taymans 2026-04-29 11:33:44 +02:00
parent 7982f52830
commit 9a4e0e4c85
1 changed files with 2 additions and 2 deletions
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4
spa/include/spa/utils/hook.h
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@ -89,10 +89,10 @@ extern "C" {
* \code{.c}
*
* static void bar_stdout(struct foo *f, const char *msg) {
* printf(msg);
* printf("%s", msg);
* }
* static void bar_stderr(struct foo *f, const char *msg) {
* fprintf(stderr, msg);
* fprintf(stderr, "%s", msg);
* }
*
* struct foo* get_foo_from_somewhere() {