linux-kernel - [PATCH 05/37] binder: remove unneeded cleanup code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 29 Jun 2017 12:01:39 -0700
From:   Todd Kjos <tkjos@...roid.com>
To:     gregkh@...uxfoundation.org, arve@...roid.com,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        maco@...gle.com, tkjos@...gle.com
Subject: [PATCH 05/37] binder: remove unneeded cleanup code

The buffer's transaction has already been freed before
binder_deferred_release. No need to do it again.

Signed-off-by: Todd Kjos <tkjos@...gle.com>
---
 drivers/android/binder.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 1097d056ea6b..2cbd7558fc3f 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -3631,7 +3631,6 @@ static int binder_node_release(struct binder_node *node, int refs)
 
 static void binder_deferred_release(struct binder_proc *proc)
 {
-	struct binder_transaction *t;
 	struct binder_context *context = proc->context;
 	struct rb_node *n;
 	int threads, nodes, incoming_refs, outgoing_refs, buffers,
@@ -3689,14 +3688,8 @@ static void binder_deferred_release(struct binder_proc *proc)
 
 		buffer = rb_entry(n, struct binder_buffer, rb_node);
 
-		t = buffer->transaction;
-		if (t) {
-			t->buffer = NULL;
-			buffer->transaction = NULL;
-			pr_err("release proc %d, transaction %d, not freed\n",
-			       proc->pid, t->debug_id);
-			/*BUG();*/
-		}
+		/* Transaction should already have been freed */
+		BUG_ON(buffer->transaction);
 
 		binder_free_buf(proc, buffer);
 		buffers++;
-- 
2.13.2.725.g09c95d1e9-goog