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authorWei Yongjun <yongjun_wei@trendmicro.com.cn>2013-06-18 21:09:12 +0800
committerZhang Rui <rui.zhang@intel.com>2013-07-15 16:26:33 +0800
commitc7c1b3112e643d290471abd0f3b27ffeec6f28dd (patch)
tree6bd8b56facdff4d7137cd3c64d2011331cfad448 /drivers/thermal
parentf3ed0a17f0292300b3caca32d823ecd32554a667 (diff)
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>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/x86_pkg_temp_thermal.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c
index 034604c021d6..cf172d50b5d3 100644
--- a/drivers/thermal/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/x86_pkg_temp_thermal.c
@@ -394,6 +394,7 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
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 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
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);