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linux-user: check some parameters for some socket syscalls. 

This patch is fixing following issues :

- commit 8fea36025b was applied to
  do_getsockname instead of do_accept.
- Some syscalls were not checking properly the memory addresses passed
  as argument
- Add check before syscalls made for cases like do_getpeername() where
  we're using the address parameter after doing the syscall
- Fix do_accept to return EINVAL instead of EFAULT when parameters
  invalid to match with linux behaviour

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
This commit is contained in:
Arnaud Patard 2009-06-19 10:44:45 +03:00 committed by Riku Voipio
parent fd4d81dd04
commit 917507b01e
1 changed files with 34 additions and 8 deletions
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42
linux-user/syscall.c
View File

@ -1498,13 +1498,17 @@ static abi_long do_bind(int sockfd, abi_ulong target_addr,
socklen_t addrlen)
{
void *addr;
abi_long ret;
if (addrlen < 0)
return -TARGET_EINVAL;
addr = alloca(addrlen+1);
target_to_host_sockaddr(addr, target_addr, addrlen);
ret = target_to_host_sockaddr(addr, target_addr, addrlen);
if (ret)
return ret;
return get_errno(bind(sockfd, addr, addrlen));
}
@ -1513,13 +1517,17 @@ static abi_long do_connect(int sockfd, abi_ulong target_addr,
socklen_t addrlen)
{
void *addr;
abi_long ret;
if (addrlen < 0)
return -TARGET_EINVAL;
addr = alloca(addrlen);
target_to_host_sockaddr(addr, target_addr, addrlen);
ret = target_to_host_sockaddr(addr, target_addr, addrlen);
if (ret)
return ret;
return get_errno(connect(sockfd, addr, addrlen));
}
@ -1543,8 +1551,12 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
if (msgp->msg_name) {
msg.msg_namelen = tswap32(msgp->msg_namelen);
msg.msg_name = alloca(msg.msg_namelen);
target_to_host_sockaddr(msg.msg_name, tswapl(msgp->msg_name),
ret = target_to_host_sockaddr(msg.msg_name, tswapl(msgp->msg_name),
msg.msg_namelen);
if (ret) {
unlock_user_struct(msgp, target_msg, send ? 0 : 1);
return ret;
}
} else {
msg.msg_name = NULL;
msg.msg_namelen = 0;
@ -1586,12 +1598,19 @@ static abi_long do_accept(int fd, abi_ulong target_addr,
void *addr;
abi_long ret;
if (target_addr == 0)
return get_errno(accept(fd, NULL, NULL));
/* linux returns EINVAL if addrlen pointer is invalid */
if (get_user_u32(addrlen, target_addrlen_addr))
return -TARGET_EFAULT;
return -TARGET_EINVAL;
if (addrlen < 0)
return -TARGET_EINVAL;
if (!access_ok(VERIFY_WRITE, target_addr, addrlen))
return -TARGET_EINVAL;
addr = alloca(addrlen);
ret = get_errno(accept(fd, addr, &addrlen));
@ -1617,6 +1636,9 @@ static abi_long do_getpeername(int fd, abi_ulong target_addr,
if (addrlen < 0)
return -TARGET_EINVAL;
if (!access_ok(VERIFY_WRITE, target_addr, addrlen))
return -TARGET_EFAULT;
addr = alloca(addrlen);
ret = get_errno(getpeername(fd, addr, &addrlen));
@ -1636,15 +1658,15 @@ static abi_long do_getsockname(int fd, abi_ulong target_addr,
void *addr;
abi_long ret;
if (target_addr == 0)
return get_errno(accept(fd, NULL, NULL));
if (get_user_u32(addrlen, target_addrlen_addr))
return -TARGET_EFAULT;
if (addrlen < 0)
return -TARGET_EINVAL;
if (!access_ok(VERIFY_WRITE, target_addr, addrlen))
return -TARGET_EFAULT;
addr = alloca(addrlen);
ret = get_errno(getsockname(fd, addr, &addrlen));
@ -1688,7 +1710,11 @@ static abi_long do_sendto(int fd, abi_ulong msg, size_t len, int flags,
return -TARGET_EFAULT;
if (target_addr) {
addr = alloca(addrlen);
target_to_host_sockaddr(addr, target_addr, addrlen);
ret = target_to_host_sockaddr(addr, target_addr, addrlen);
if (ret) {
unlock_user(host_msg, msg, 0);
return ret;
}
ret = get_errno(sendto(fd, host_msg, len, flags, addr, addrlen));
} else {
ret = get_errno(send(fd, host_msg, len, flags));