diff options
| -rw-r--r-- | net/core/skbuff.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 785daff48030..28b8242f18d7 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3292,7 +3292,19 @@ EXPORT_SYMBOL(skb_split); */ static int skb_prepare_for_shift(struct sk_buff *skb) { - return skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC); + int ret = 0; + + if (skb_cloned(skb)) { + /* Save and restore truesize: pskb_expand_head() may reallocate + * memory where ksize(kmalloc(S)) != ksize(kmalloc(S)), but we + * cannot change truesize at this point. + */ + unsigned int save_truesize = skb->truesize; + + ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); + skb->truesize = save_truesize; + } + return ret; } /** |