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6b6707a50c
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>
2589 lines
67 KiB
2589 lines
67 KiB