[libvirt] [PATCH] cmdFreepages: initialize @tmp

In the 404bac14 the @tmp variable was introduced. It's purpose is to avoid typecasting when parsing --pagesize argument. However, if the argument is not presented, tmp may be used uninitialized resulting in bogus virNodeGetFreePages() API call: virsh freepages --cellno 2 error: Failed to open file '/sys/devices/system/node/node2/hugepages/hugepages-4294967295kB/free_hugepages': No such file or directory Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- tools/virsh-host.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/virsh-host.c b/tools/virsh-host.c index 13d4c5c..734f1a8 100644 --- a/tools/virsh-host.c +++ b/tools/virsh-host.c @@ -229,7 +229,7 @@ cmdFreepages(vshControl *ctl, const vshCmd *cmd) bool ret = false; unsigned int npages; unsigned int *pagesize = NULL; - unsigned long long tmp; + unsigned long long tmp = 0; int cell; unsigned long long *counts = NULL; size_t i, j; -- 1.8.5.5

On 06/23/2014 12:34 PM, Michal Privoznik wrote:
In the 404bac14 the @tmp variable was introduced. It's purpose is to avoid typecasting when parsing --pagesize argument. However, if the argument is not presented, tmp may be used uninitialized resulting in bogus virNodeGetFreePages() API call:
virsh freepages --cellno 2 error: Failed to open file '/sys/devices/system/node/node2/hugepages/hugepages-4294967295kB/free_hugepages': No such file or directory
Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- tools/virsh-host.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
ACK
diff --git a/tools/virsh-host.c b/tools/virsh-host.c index 13d4c5c..734f1a8 100644 --- a/tools/virsh-host.c +++ b/tools/virsh-host.c @@ -229,7 +229,7 @@ cmdFreepages(vshControl *ctl, const vshCmd *cmd) bool ret = false; unsigned int npages; unsigned int *pagesize = NULL; - unsigned long long tmp; + unsigned long long tmp = 0; int cell; unsigned long long *counts = NULL; size_t i, j;
-- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
participants (2)
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Eric Blake
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Michal Privoznik