audit: fix signedness bug in audit_log_execve_info()

In the loop, a size_t "len" is used to hold the return value of
audit_log_single_execve_arg(), which returns -1 on error.  In that
case the error handling (len <= 0) will be bypassed since "len" is
unsigned, and the loop continues with (p += len) being wrapped.
Change the type of "len" to signed int to fix the error handling.

	size_t len;
	for (...) {
		len = audit_log_single_execve_arg(...);
		if (len <= 0)
		p += len;

Signed-off-by: Xi Wang <>
Signed-off-by: Eric Paris <>
1 file changed