This is a note to let you know that I've just added the patch titled
connector: bump skb->users before callback invocation
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
connector-bump-skb-users-before-callback-invocation.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Tue Jan 26 22:24:47 PST 2016
From: Florian Westphal <fw@xxxxxxxxx>
Date: Thu, 31 Dec 2015 14:26:33 +0100
Subject: connector: bump skb->users before callback invocation
Status: RO
Content-Length: 1407
Lines: 51
From: Florian Westphal <fw@xxxxxxxxx>
[ Upstream commit 55285bf09427c5abf43ee1d54e892f352092b1f1 ]
Dmitry reports memleak with syskaller program.
Problem is that connector bumps skb usecount but might not invoke callback.
So move skb_get to where we invoke the callback.
Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/connector/connector.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -154,26 +154,21 @@ static int cn_call_callback(struct sk_bu
*
* It checks skb, netlink header and msg sizes, and calls callback helper.
*/
-static void cn_rx_skb(struct sk_buff *__skb)
+static void cn_rx_skb(struct sk_buff *skb)
{
struct nlmsghdr *nlh;
- struct sk_buff *skb;
int len, err;
- skb = skb_get(__skb);
-
if (skb->len >= NLMSG_HDRLEN) {
nlh = nlmsg_hdr(skb);
len = nlmsg_len(nlh);
if (len < (int)sizeof(struct cn_msg) ||
skb->len < nlh->nlmsg_len ||
- len > CONNECTOR_MAX_MSG_SIZE) {
- kfree_skb(skb);
+ len > CONNECTOR_MAX_MSG_SIZE)
return;
- }
- err = cn_call_callback(skb);
+ err = cn_call_callback(skb_get(skb));
if (err < 0)
kfree_skb(skb);
}
Patches currently in stable-queue which might be from fw@xxxxxxxxx are
queue-3.10/connector-bump-skb-users-before-callback-invocation.patch
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