TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: handle the return value of pskb_carve_frag_list() correctly

Browse Source 
commit eabe861881 upstream.

pskb_carve_frag_list() may return -ENOMEM in pskb_carve_inside_nonlinear().
we should handle this correctly or we would get wrong sk_buff.

Fixes: 6fa01ccd88 ("skbuff: Add pskb_extract() helper function")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Miaohe Lin
2020-09-23 10:46:33 +02:00
committed by Greg Kroah-Hartman
parent 9a81aa7adf
commit c823c7f330
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/core/skbuff.c
+7 -3
View File
@@ -5447,9 +5447,13 @@ static int pskb_carve_inside_nonlinear(struct sk_buff *skb, const u32 off,
if (skb_has_frag_list(skb))
skb_clone_fraglist(skb);
if (k == 0) {
/* split line is in frag list */
pskb_carve_frag_list(skb, shinfo, off - pos, gfp_mask);
/* split line is in frag list */
if (k == 0 && pskb_carve_frag_list(skb, shinfo, off - pos, gfp_mask)) {
/* skb_frag_unref() is not needed here as shinfo->nr_frags = 0. */
if (skb_has_frag_list(skb))
kfree_skb_list(skb_shinfo(skb)->frag_list);
kfree(data);
return -ENOMEM;
}
skb_release_data(skb);