From: Anne Thrax <foobarfoobarfoobar@gmail.com>
To: kernel-janitors@vger.kernel.org
Subject: Re: [KJ] [PATCH] net/ipv4/netfilter/ipt_recent.c 2.6.17-rc2-git5
Date: Mon, 24 Apr 2006 20:39:10 +0000 [thread overview]
Message-ID: <444D376E.7040007@gmail.com> (raw)
In-Reply-To: <444C4F8E.4050001@gmail.com>
>
> But this skbuff wasn't allocated with alloc_skb(). Is this kosher?
> Is it also a bug that this skb was kmalloced?
>
> It looks to me like this is a fake skb and it should be kfree'd,
> but I'd welcome more eyes on this one.
>
Maybe we should then have it alloc_skb() rather than just kmalloc()
The function isn't there for nothing, and it does do some checking
that would not be done through kmalloc() and kfree().
--- /usr/src/linux-2.6.17-rc2-git5-orig/net/ipv4/netfilter/ipt_recent.c
2006-04-23 16:47:53.000000000 -0500
+++ /usr/src/linux-2.6.17-rc2-git5/net/ipv4/netfilter/ipt_recent.c
2006-04-23 23:50:50.000000000 -0500
@@ -304,7 +304,7 @@
strncpy(info->name,curr_table->name,IPT_RECENT_NAME_LEN);
info->name[IPT_RECENT_NAME_LEN-1] = '\0';
- skb = kmalloc(sizeof(struct sk_buff),GFP_KERNEL);
+ skb = alloc_skb(sizeof(struct sk_buff),GFP_KERNEL);
if (!skb) {
used = -ENOMEM;
goto out_free_info;
@@ -323,7 +323,7 @@
kfree(skb->nh.iph);
out_free_skb:
- kfree(skb);
+ kfree_skb(skb);
out_free_info:
kfree(info);
While reading the function alloc_skb(), you can request it to be
a certain size. But why would anyone want to allocate a different
size than sizeof(sk_buff)? Unless there is something I'm missing
here, why don't we just remove the size parameter altogether?
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next prev parent reply other threads:[~2006-04-24 20:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-24 4:09 [KJ] [PATCH] net/ipv4/netfilter/ipt_recent.c 2.6.17-rc2-git5 Anne Thrax
2006-04-24 4:41 ` Matthew Wilcox
2006-04-24 20:39 ` Anne Thrax [this message]
2006-04-24 23:24 ` Matthew Wilcox
2006-04-25 0:31 ` Stephen Frost
2006-04-25 1:04 ` Anne Thrax
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