[Xen-changelog] [xen stable-4.3] cpufreq: missing check of copy_from_guest()

[patchbot@xxxxxxx]

commit 9e5a66bc88a0cf0ff0f3339381a2332f305d1a9c
Author:     Tim Deegan <tim@xxxxxxx>
AuthorDate: Mon Sep 23 16:23:14 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Sep 23 16:23:14 2013 +0200

    cpufreq: missing check of copy_from_guest()
    
    Coverity CID 1055131
    Coverity CID 1055132
    
    Signed-off-by: Tim Deegan <tim@xxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: 803f9a6cdfeda64beee908576de0ad02d6b0c480
    master date: 2013-09-12 17:47:08 +0100
---
 xen/drivers/cpufreq/cpufreq.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c
index 0de5d41..ab66884 100644
--- a/xen/drivers/cpufreq/cpufreq.c
+++ b/xen/drivers/cpufreq/cpufreq.c
@@ -471,8 +471,12 @@ int set_px_pminfo(uint32_t acpi_id, struct 
xen_processor_performance *dom0_px_in
             ret = -ENOMEM;
             goto out;
         }
-        copy_from_guest(pxpt->states, dom0_px_info->states, 
-                                      dom0_px_info->state_count);
+        if ( copy_from_guest(pxpt->states, dom0_px_info->states,
+                             dom0_px_info->state_count) )
+        {
+            ret = -EFAULT;
+            goto out;
+        }
         pxpt->state_count = dom0_px_info->state_count;
 
         if ( cpufreq_verbose )
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.3

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