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| author | Herbert Xu <[email protected]> | 2015-08-04 15:42:47 +0800 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2015-08-06 21:55:47 -0700 |
| commit | a0a2a6602496a45ae838a96db8b8173794b5d398 (patch) | |
| tree | 5508d9f02066c30854b0c88b82fffc03c857adef /drivers/net/xen-netback/interface.c | |
| parent | 14d2b7c1a96ef37eb571599c73d4a1a606b964d6 (diff) | |
net: Fix skb_set_peeked use-after-free bug
The commit 738ac1ebb96d02e0d23bc320302a6ea94c612dec ("net: Clone
skb before setting peeked flag") introduced a use-after-free bug
in skb_recv_datagram. This is because skb_set_peeked may create
a new skb and free the existing one. As it stands the caller will
continue to use the old freed skb.
This patch fixes it by making skb_set_peeked return the new skb
(or the old one if unchanged).
Fixes: 738ac1ebb96d ("net: Clone skb before setting peeked flag")
Reported-by: Brenden Blanco <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
Tested-by: Brenden Blanco <[email protected]>
Reviewed-by: Konstantin Khlebnikov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'drivers/net/xen-netback/interface.c')
0 files changed, 0 insertions, 0 deletions