diff options
| author | Daniel Borkmann <dborkman@redhat.com> | 2013-12-30 23:40:50 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-02 19:31:09 -0500 |
| commit | 4d231b76eef6c4a6bd9c96769e191517765942cb (patch) | |
| tree | ae855d6ce8a7d2c67f13e2ab9f9376dc6b2e315d /net/llc/llc_if.c | |
| parent | 6cd4ce0099da7702f885b6fa9ebb49e3831d90b4 (diff) | |
net: llc: fix use after free in llc_ui_recvmsg
While commit 30a584d944fb fixes datagram interface in LLC, a use
after free bug has been introduced for SOCK_STREAM sockets that do
not make use of MSG_PEEK.
The flow is as follow ...
if (!(flags & MSG_PEEK)) {
...
sk_eat_skb(sk, skb, false);
...
}
...
if (used + offset < skb->len)
continue;
... where sk_eat_skb() calls __kfree_skb(). Therefore, cache
original length and work on skb_len to check partial reads.
Fixes: 30a584d944fb ("[LLX]: SOCK_DGRAM interface fixes")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/llc/llc_if.c')
0 files changed, 0 insertions, 0 deletions