From: Xi Wang <xi.wang@gmail.com>
Date: Tue, 20 Dec 2011 23:39:41 +0000 (-0500)
Subject: audit: fix signedness bug in audit_log_execve_info()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5afb8a3f96573f7ea018abb768f5b6ebe1a6c1a4;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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)
			break;
		p += len;
	}

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
---

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 593237e3654d..86584ecb1039 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1362,8 +1362,8 @@ static void audit_log_execve_info(struct audit_context *context,
 				  struct audit_buffer **ab,
 				  struct audit_aux_data_execve *axi)
 {
-	int i;
-	size_t len, len_sent = 0;
+	int i, len;
+	size_t len_sent = 0;
 	const char __user *p;
 	char *buf;