Re: [PATCH] qemu: Fix double free when live-attaching shmem

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Nov 09, 2016 at 05:55:34PM +0100, Pavel Hrdina wrote:
On Wed, Nov 09, 2016 at 05:43:49PM +0100, Martin Kletzander wrote:
Function qemuDomainAttachShmemDevice() steals the device data if the
hotplug was successful, but the condition checked for unsuccessful
execution otherwise.

Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
---
 src/qemu/qemu_driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 38c841420e32..a82e58b29f29 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -7615,7 +7615,7 @@ qemuDomainAttachDeviceLive(virDomainObjPtr vm,
     case VIR_DOMAIN_DEVICE_SHMEM:
         ret = qemuDomainAttachShmemDevice(driver, vm,
                                           dev->data.shmem);
-        if (ret < 0) {
+        if (!ret) {

In this case I would probably use ret == 0.  We are not consistent at all, for
example in this function there is more occurrences of !ret, but in case of *int*
I think it's better to check for specific value, not like in case of *pointer*
or *bool* where !ret makes more sense.

ACK


I sent the patch without --notes which made part of the explanation
disappear.  But since you "asked for it" :) here goes:

Notes:
   This is actually how the code looked like before the last review.
   At least now I know that I should stand up for myself.  All the
   other relevant branches use the same syntax for this logic anyway.

I could also used -W to show the whole function.

Pavel

             alias = dev->data.shmem->info.alias;
             dev->data.shmem = NULL;
         }
--
2.10.2

--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list

Attachment: signature.asc
Description: Digital signature

--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list

[Index of Archives]     [Virt Tools]     [Libvirt Users]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [KDE Users]     [Fedora Tools]