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| author | James Chapman | 2008-06-10 21:35:00 +0200 |
|---|---|---|
| committer | David S. Miller | 2008-06-10 21:35:00 +0200 |
| commit | 6b6707a50c7598a83820077393f8823ab791abf8 (patch) | |
| tree | 5a707de3b34eeaa2bad9b16d5ad006abe4a6d901 /net/dccp/ipv6.c | |
| parent | ipv6 netns: init net is used to set bindv6only for new sock (diff) | |
| download | kernel-qcow2-linux-6b6707a50c7598a83820077393f8823ab791abf8.tar.gz kernel-qcow2-linux-6b6707a50c7598a83820077393f8823ab791abf8.tar.xz kernel-qcow2-linux-6b6707a50c7598a83820077393f8823ab791abf8.zip | |
l2tp: Fix potential memory corruption in pppol2tp_recvmsg()
This patch fixes a potential memory corruption in
pppol2tp_recvmsg(). If skb->len is bigger than the caller's buffer
length, memcpy_toiovec() will go into unintialized data on the kernel
heap, interpret it as an iovec and start modifying memory.
The fix is to change the memcpy_toiovec() call to
skb_copy_datagram_iovec() so that paged packets (rare for PPPOL2TP)
are handled properly. Also check that the caller's buffer is big
enough for the data and set the MSG_TRUNC flag if it is not so.
Reported-by: Ilja <ilja@netric.org>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/ipv6.c')
0 files changed, 0 insertions, 0 deletions