From: Jiri Slaby Date: Mon, 21 Jun 2010 15:40:15 +0000 (+0200) Subject: X86: intel_ips, check for kzalloc properly X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e9ec7f3539cbeae8ffc5d7b30543e5612df5cba3;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git X86: intel_ips, check for kzalloc properly Stanse found that there are two NULL checks missing in ips_monitor. So check their value too and bail out appropriately if the allocation failed. While at it, add one more kfree to the fail path. It is not necessary now, but may be needed in the future when a new allocation is added. And for completeness. Also remove unneeded initialization of the variables. They are all set right after their declaration. Signed-off-by: Jiri Slaby Signed-off-by: Matthew Garrett Acked-by: Jesse Barnes --- diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c index cdaf40e44460..03448224aedb 100644 --- a/drivers/platform/x86/intel_ips.c +++ b/drivers/platform/x86/intel_ips.c @@ -920,9 +920,8 @@ static int ips_monitor(void *data) struct timer_list timer; unsigned long seqno_timestamp, expire, last_msecs, last_sample_period; int i; - u32 *cpu_samples = NULL, *mchp_samples = NULL, old_cpu_power; - u16 *mcp_samples = NULL, *ctv1_samples = NULL, *ctv2_samples = NULL, - *mch_samples = NULL; + u32 *cpu_samples, *mchp_samples, old_cpu_power; + u16 *mcp_samples, *ctv1_samples, *ctv2_samples, *mch_samples; u8 cur_seqno, last_seqno; mcp_samples = kzalloc(sizeof(u16) * IPS_SAMPLE_COUNT, GFP_KERNEL); @@ -931,7 +930,8 @@ static int ips_monitor(void *data) mch_samples = kzalloc(sizeof(u16) * IPS_SAMPLE_COUNT, GFP_KERNEL); cpu_samples = kzalloc(sizeof(u32) * IPS_SAMPLE_COUNT, GFP_KERNEL); mchp_samples = kzalloc(sizeof(u32) * IPS_SAMPLE_COUNT, GFP_KERNEL); - if (!mcp_samples || !ctv1_samples || !ctv2_samples || !mch_samples) { + if (!mcp_samples || !ctv1_samples || !ctv2_samples || !mch_samples || + !cpu_samples || !mchp_samples) { dev_err(&ips->dev->dev, "failed to allocate sample array, ips disabled\n"); kfree(mcp_samples); @@ -939,6 +939,7 @@ static int ips_monitor(void *data) kfree(ctv2_samples); kfree(mch_samples); kfree(cpu_samples); + kfree(mchp_samples); kthread_stop(ips->adjust); return -ENOMEM; }