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* The network syscalls now check if you try to pass a non-userland address to 

them (which you previously could use to easily crash/take over Haiku).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33570 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2009-10-13 07:19:18 +00:00
parent 6a6aa9bdb0
commit 273dbd0916
1 changed files with 16 additions and 3 deletions
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19
src/system/kernel/fs/socket.cpp
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@ -5,6 +5,7 @@
* Distributed under the terms of the MIT License.
*/
#include <sys/socket.h>
#include <errno.h>
@ -166,7 +167,7 @@ prepare_userland_msghdr(const msghdr* userMessage, msghdr& message,
vecsDeleter.SetTo(vecs);
if (!IS_USER_ADDRESS(message.msg_iov)
|| user_memcpy(vecs, message.msg_iov,
|| user_memcpy(vecs, message.msg_iov,
message.msg_iovlen * sizeof(iovec)) != B_OK) {
return B_BAD_ADDRESS;
}
@ -913,6 +914,9 @@ _user_accept(int socket, struct sockaddr *userAddress,
ssize_t
_user_recv(int socket, void *data, size_t length, int flags)
{
if (data == NULL || !IS_USER_ADDRESS(data))
return B_BAD_ADDRESS;
SyscallRestartWrapper<ssize_t> result;
return result = common_recv(socket, data, length, flags, false);
}
@ -922,6 +926,9 @@ ssize_t
_user_recvfrom(int socket, void *data, size_t length, int flags,
struct sockaddr *userAddress, socklen_t *_addressLength)
{
if (data == NULL || !IS_USER_ADDRESS(data))
return B_BAD_ADDRESS;
// check parameters
socklen_t addressLength = 0;
status_t error = prepare_userland_address_result(userAddress,
@ -1010,6 +1017,9 @@ _user_recvmsg(int socket, struct msghdr *userMessage, int flags)
ssize_t
_user_send(int socket, const void *data, size_t length, int flags)
{
if (data == NULL || !IS_USER_ADDRESS(data))
return B_BAD_ADDRESS;
SyscallRestartWrapper<ssize_t> result;
return result = common_send(socket, data, length, flags, false);
}
@ -1019,8 +1029,11 @@ ssize_t
_user_sendto(int socket, const void *data, size_t length, int flags,
const struct sockaddr *userAddress, socklen_t addressLength)
{
// TODO: If this is a connection-mode socket, the address parameter is
// supposed to be ignored.
if (data == NULL || !IS_USER_ADDRESS(data))
return B_BAD_ADDRESS;
// TODO: If this is a connection-mode socket, the address parameter is
// supposed to be ignored.
if (userAddress == NULL || addressLength <= 0
|| addressLength > MAX_SOCKET_ADDRESS_LENGTH) {
return B_BAD_VALUE;