SELinux: null-terminate context string in selinux_xfrm_sec_ctx_alloc
xfrm_audit_log() expects the context string to be null-terminated
which currently doesn't happen with user-supplied contexts.
Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index bd8d1ef..ba715f4 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -216,7 +216,7 @@
return -ENOMEM;
*ctxp = ctx = kmalloc(sizeof(*ctx) +
- uctx->ctx_len,
+ uctx->ctx_len + 1,
GFP_KERNEL);
if (!ctx)
@@ -229,6 +229,7 @@
memcpy(ctx->ctx_str,
uctx+1,
ctx->ctx_len);
+ ctx->ctx_str[ctx->ctx_len] = 0;
rc = security_context_to_sid(ctx->ctx_str,
ctx->ctx_len,
&ctx->ctx_sid);