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Fix aliasing issues in RPC code

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This commit is contained in:
Ulrich Drepper
2011-12-04 13:20:06 -05:00
parent aff2453df7
commit 4efbd5cb39
4 changed files with 37 additions and 3 deletions
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16
sunrpc/clnt_unix.c
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@ -338,7 +338,8 @@ static bool_t
clntunix_control (CLIENT *cl, int request, char *info)
{
struct ct_data *ct = (struct ct_data *) cl->cl_private;
u_long *mcall_ptr;
u_long ul;
switch (request)
{
@ -366,11 +367,24 @@ clntunix_control (CLIENT *cl, int request, char *info)
* first element in the call structure *.
* This will get the xid of the PREVIOUS call
*/
#if 0
/* This original code has aliasing issues. */
*(u_long *) info = ntohl (*(u_long *)ct->ct_mcall);
#else
mcall_ptr = (u_long *)ct->ct_mcall;
ul = ntohl (*mcall_ptr);
memcpy (info, &ul, sizeof (ul));
#endif
break;
case CLSET_XID:
/* This will set the xid of the NEXT call */
#if 0
/* This original code has aliasing issues. */
*(u_long *) ct->ct_mcall = htonl (*(u_long *)info - 1);
#else
ul = ntohl (*(u_long *)info - 1);
memcpy (ct->ct_mcall, &ul, sizeof (ul));
#endif
/* decrement by 1 as clntunix_call() increments once */
break;
case CLGET_VERS: