Messages in this thread Patch in this message | | | Subject | [PATCH][RE-SEND] drivers/isdn/i4l/isdn_common.c fix small resource leak | From | "Darren Jenkins\\" <> | Date | Mon, 07 Jul 2008 08:52:38 +1000 |
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G'day people,
Coverity CID: 1356 RESOURCE_LEAK
I found a very old patch for this that was Acked but did not get applied https://lists.linux-foundation.org/pipermail/kernel-janitors/2006-September/016362.html
There looks to be a small leak in isdn_writebuf_stub() in isdn_common.c, when copy_from_user() returns an un-copied data length (length != 0). The below patch should be a minimally invasive fix.
Signed-off-by: Darren Jenkins <darrenrjenkins@gmailcom> Acked-by: Karsten Keil <kkeil@suse.de>
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c index 0f3c66d..8d8c6b7 100644 --- a/drivers/isdn/i4l/isdn_common.c +++ b/drivers/isdn/i4l/isdn_common.c @@ -1977,8 +1977,10 @@ isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len) if (!skb) return -ENOMEM; skb_reserve(skb, hl); - if (copy_from_user(skb_put(skb, len), buf, len)) + if (copy_from_user(skb_put(skb, len), buf, len)) { + dev_kfree_skb(skb); return -EFAULT; + } ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb); if (ret <= 0) dev_kfree_skb(skb);
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