diff options
| author | Daniel Borkmann <dborkman@redhat.com> | 2013-12-30 22:40:50 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-15 23:31:38 (GMT) |
| commit | f680803b3bd132c43ca72fd02b4096309b603af4 (patch) | |
| tree | b2d26f084bb29e1e507528d0fff56dcfbbf25c85 /net/core | |
| parent | 4e18f0b53730ef56fa16e271d4971611f6a95ed9 (diff) | |
| download | linux-fsl-qoriq-f680803b3bd132c43ca72fd02b4096309b603af4.tar.xz | |
net: llc: fix use after free in llc_ui_recvmsg
[ Upstream commit 4d231b76eef6c4a6bd9c96769e191517765942cb ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/core')
0 files changed, 0 insertions, 0 deletions