Thermal: x86_pkg_temp: fix krealloc() misuse in in pkg_temp_thermal_device_add()
If krealloc() returns NULL, it doesn't free the original. So any code
of the form 'foo = krealloc(foo, ...);' is almost certainly a bug.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c
index 034604c..cf172d50 100644
--- a/drivers/thermal/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/x86_pkg_temp_thermal.c
@@ -394,6 +394,7 @@
char buffer[30];
int thres_count;
u32 eax, ebx, ecx, edx;
+ u8 *temp;
cpuid(6, &eax, &ebx, &ecx, &edx);
thres_count = ebx & 0x07;
@@ -417,13 +418,14 @@
spin_lock(&pkg_work_lock);
if (topology_physical_package_id(cpu) > max_phy_id)
max_phy_id = topology_physical_package_id(cpu);
- pkg_work_scheduled = krealloc(pkg_work_scheduled,
- (max_phy_id+1) * sizeof(u8), GFP_ATOMIC);
- if (!pkg_work_scheduled) {
+ temp = krealloc(pkg_work_scheduled,
+ (max_phy_id+1) * sizeof(u8), GFP_ATOMIC);
+ if (!temp) {
spin_unlock(&pkg_work_lock);
err = -ENOMEM;
goto err_ret_free;
}
+ pkg_work_scheduled = temp;
pkg_work_scheduled[topology_physical_package_id(cpu)] = 0;
spin_unlock(&pkg_work_lock);