joy/android_kernel_sony_sdm845
Watch
1
Fork
You've already forked android_kernel_sony_sdm845
 0
Code Issues Pull requests Projects Releases Wiki Activity

UPSTREAM: sock: fix zerocopy_success regression with msg_zerocopy

Browse source 
Do not use uarg->zerocopy outside msg_zerocopy. In other paths the
field is not explicitly initialized and aliases another field.

Those paths have only one reference so do not need this intermediate
variable. Call uarg->callback directly.

Fixes: 1f8b977ab32d ("sock: enable MSG_ZEROCOPY")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sorayukii <sorayukii69@gmail.com>
This commit is contained in:
Willem de Bruijn 2017-08-09 19:09:44 -04:00 • committed by Sorayukii
commit 2aa2afc629
1 changed files with 7 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/linux/skbuff.h
View file

@ -1333,8 +1333,13 @@ static inline void skb_zcopy_clear(struct sk_buff *skb, bool zerocopy)
struct ubuf_info *uarg = skb_zcopy(skb);
if (uarg) {
uarg->zerocopy = uarg->zerocopy && zerocopy;
sock_zerocopy_put(uarg);
if (uarg->callback == sock_zerocopy_callback) {
uarg->zerocopy = uarg->zerocopy && zerocopy;
sock_zerocopy_put(uarg);
} else {
uarg->callback(uarg, zerocopy);
}
skb_shinfo(skb)->tx_flags &= ~SKBTX_ZEROCOPY_FRAG;
}
}