netdev - [PATCH 07/10] 9P/RDMA: Do not free req->rc in error handling in rdma

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:	Tue,  2 Jul 2013 15:11:21 +0200
From:	Simon Derr <simon.derr@...l.net>
To:	netdev@...r.kernel.org
Cc:	simon.derr@...l.net, ericvh@...il.com
Subject: [PATCH 07/10] 9P/RDMA: Do not free req->rc in error handling in rdma_request()

rdma_request() should never be in charge of freeing rc.

When an error occurs:
* Either the rc buffer has been recv_post()'ed.
  then kfree()'ing it certainly is a bad idea.
* Or is has not, and in that case req->rc still points to it,
  hence it needs not be freed.

Signed-off-by: Simon Derr <simon.derr@...l.net>
---
 net/9p/trans_rdma.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c
index ad8dc33..1bd4c71 100644
--- a/net/9p/trans_rdma.c
+++ b/net/9p/trans_rdma.c
@@ -447,7 +447,7 @@ static int rdma_request(struct p9_client *client, struct p9_req_t *req)
 	err = post_recv(client, rpl_context);
 	if (err) {
 		p9_debug(P9_DEBUG_FCALL, "POST RECV failed\n");
-		goto err_free1;
+		goto err_free;
 	}
 
 	/* remove posted receive buffer from request structure */
@@ -457,7 +457,7 @@ static int rdma_request(struct p9_client *client, struct p9_req_t *req)
 	c = kmalloc(sizeof *c, GFP_NOFS);
 	if (!c) {
 		err = -ENOMEM;
-		goto err_free1;
+		goto err_free;
 	}
 	c->req = req;
 
@@ -486,13 +486,10 @@ static int rdma_request(struct p9_client *client, struct p9_req_t *req)
 
  error:
 	kfree(c);
-	kfree(rpl_context->rc);
 	kfree(rpl_context);
 	p9_debug(P9_DEBUG_ERROR, "EIO\n");
 	return -EIO;
- err_free1:
-	kfree(rpl_context->rc);
- err_free2:
+ err_free:
 	kfree(rpl_context);
  err_close:
 	spin_lock_irqsave(&rdma->req_lock, flags);
-- 
1.7.2.2

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html