[PATCH] X86: intel_ips, check for kzalloc properly
in [Kernel]
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From: Jiri Slaby on 21 Jun 2010 11:50 Or what about this one? -- 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 <jslaby(a)suse.cz> Cc: Jesse Barnes <jbarnes(a)virtuousgeek.org> Cc: Matthew Garrett <mjg(a)redhat.com> --- drivers/platform/x86/intel_ips.c | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c index cdaf40e..0344822 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; } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |