linux-kernel - [PATCH v2] staging: binder: fix usage of uninit scalar in binder

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Date:	Wed, 7 May 2014 21:44:53 +0200
From:	Christian Engelmayer <cengelma@....at>
To:	devel@...verdev.osuosl.org
Cc:	john.stultz@...aro.org, serban.constantinescu@....com,
	arve@...roid.com, ccross@...roid.com, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: binder: fix usage of uninit scalar in
 binder_transaction()

Fix the error path when a cookie mismatch is detected. In that case the
function jumps to the exit label without setting the uninitialized, local
variable 'return_error'. Detected by Coverity - CID 201453.

Signed-off-by: Christian Engelmayer <cengelma@....at>
---
v2: Resend after v1 failed to apply

   * rebased against staging-next - commit 09c3fbba (staging: rtl8188eu:
     Remove 'u8 *pbuf' from struct recv_buf)
   * fixed mua: no multipart, 7bit text/plain us-ascii

Compile tested and applies against branch staging-next of tree
git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
---
 drivers/staging/android/binder.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
index 35c00ab..de8e2a3 100644
--- a/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@ -1546,6 +1546,7 @@ static void binder_transaction(struct binder_proc *proc,
 					proc->pid, thread->pid,
 					(u64)fp->binder, node->debug_id,
 					(u64)fp->cookie, (u64)node->cookie);
+				return_error = BR_FAILED_REPLY;
 				goto err_binder_get_ref_for_node_failed;
 			}
 			ref = binder_get_ref_for_node(target_proc, node);
-- 
1.9.1

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