[PATCH 5.18 0798/1095] tools/power/x86/intel-speed-select: Fix off by one check

Greg Kroah-Hartman
2022-08-15T22:23:53Z

From: Dan Carpenter <dan.carpenter@oracle.com>

[ Upstream commit d9f74d98bbec978edbf860f729b531281ba0d8ff ]

Change > MAX_DIE_PER_PACKAGE to >= MAX_DIE_PER_PACKAGE to prevent
accessing one element beyond the end of the array.

Fixes: 7fd786dfbd2c ("tools/power/x86/intel-speed-select: OOB daemon mode")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/power/x86/intel-speed-select/isst-daemon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/power/x86/intel-speed-select/isst-daemon.c b/tools/power/x86/intel-speed-select/isst-daemon.c
index dd372924bc82..d0400c6684ba 100644
--- a/tools/power/x86/intel-speed-select/isst-daemon.c
+++ b/tools/power/x86/intel-speed-select/isst-daemon.c
@@ -41,7 +41,7 @@ void process_level_change(int cpu)
time_t tm;
int ret;

- if (pkg_id >= MAX_PACKAGE_COUNT || die_id > MAX_DIE_PER_PACKAGE) {
+ if (pkg_id >= MAX_PACKAGE_COUNT || die_id >= MAX_DIE_PER_PACKAGE) {
debug_printf("Invalid package/die info for cpu:%d\n", cpu);
return;
}
--
2.35.1