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Re: [libvirt] [PATCH] xen: fix memory corruption in legacy driver



Eric Blake wrote:
> On 08/05/2013 10:39 AM, Jim Fehlig wrote:
>   
>> Commit 632180d1 introduced memory corruption in xenDaemonListDefinedDomains
>> by starting to populate the names array at index -1, causing all sorts
>> of havoc in libvirtd such as aborts like the following
>>
>> *** Error in `/usr/sbin/libvirtd': double free or corruption (out): 0x00007fffe00ccf20 ***
>> ======= Backtrace: =========
>> /lib64/libc.so.6(+0x7abf6)[0x7ffff3fa0bf6]
>> /lib64/libc.so.6(+0x7b973)[0x7ffff3fa1973]
>> /lib64/libc.so.6(xdr_array+0xde)[0x7ffff403cbae]
>> /usr/sbin/libvirtd(+0x50251)[0x5555555a4251]
>> /lib64/libc.so.6(xdr_free+0x15)[0x7ffff403ccd5]
>> /usr/lib64/libvirt.so.0(+0x1fad34)[0x7ffff76b1d34]
>> /usr/lib64/libvirt.so.0(virNetServerProgramDispatch+0x1fc)[0x7ffff76b16f1]
>> /usr/lib64/libvirt.so.0(+0x1f214a)[0x7ffff76a914a]
>> /usr/lib64/libvirt.so.0(+0x1f222d)[0x7ffff76a922d]
>> /usr/lib64/libvirt.so.0(+0xbcc4f)[0x7ffff7573c4f]
>> /usr/lib64/libvirt.so.0(+0xbc5e5)[0x7ffff75735e5]
>> /lib64/libpthread.so.0(+0x7e0f)[0x7ffff48f7e0f]
>> /lib64/libc.so.6(clone+0x6d)[0x7ffff400e7dd]
>>
>> Fix by initializing ret to 0 and only setting to error on failure path.
>> ---
>>  src/xen/xend_internal.c | 7 +++----
>>  1 file changed, 3 insertions(+), 4 deletions(-)
>>     
>
> ACK.
>   

Pushed now, thanks.

Regards,
Jim


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