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pseries: Add more parameter validation in RTAS time of day functions 

Currently, the RTAS time of day functions only partially validate the
number of parameters they receive and return.  Because of how the
parameters are used, this is unlikely to lead to a crash, but it's messy.

This patch adds the missing checks.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
master
David Gibson 2015-02-06 14:55:48 +11:00 committed by Alexander Graf
parent 12f421745c
commit bbade20633
1 changed files with 6 additions and 1 deletions
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7
hw/ppc/spapr_rtc.c
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@ -36,7 +36,7 @@ static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
{
struct tm tm;
if (nret != 8) {
if ((nargs != 0) || (nret != 8)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
@ -60,6 +60,11 @@ static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
{
struct tm tm;
if ((nargs != 7) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
tm.tm_year = rtas_ld(args, 0) - 1900;
tm.tm_mon = rtas_ld(args, 1) - 1;
tm.tm_mday = rtas_ld(args, 2);