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authorEric Dumazet <edumazet@google.com>2016-11-02 15:53:17 +0100
committerDavid S. Miller <davem@davemloft.net>2016-11-03 20:33:30 +0100
commitac9e70b17ecd7c6e933ff2eaf7ab37429e71bf4d (patch)
tree781677be717b11066e303449ee4abd787048816e /include/net/ip.h
parentqede: Correctly map aggregation replacement pages (diff)
downloadlinux-ac9e70b17ecd7c6e933ff2eaf7ab37429e71bf4d.tar.xz
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tcp: fix potential memory corruption
Imagine initial value of max_skb_frags is 17, and last skb in write queue has 15 frags. Then max_skb_frags is lowered to 14 or smaller value. tcp_sendmsg() will then be allowed to add additional page frags and eventually go past MAX_SKB_FRAGS, overflowing struct skb_shared_info. Fixes: 5f74f82ea34c ("net:Add sysctl_max_skb_frags") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Cc: HÃ¥kon Bugge <haakon.bugge@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip.h')
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