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

[libvirt] [PATCHv2] virsh: avoid uninitialized memory usage

Detected by valgrind.

* tools/virsh.c (cmdBlockPull): fix uninitialized memory usage.
* How to reproduce?
$ qemu-img create /var/lib/libvirt/images/test 1M
$ cat > /tmp/test.xml <<EOF
<domain type='qemu'>
    <type arch='x86_64'>hvm</type>
    <boot dev='hd'/>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/test'/>
      <target dev='vda' bus='virtio'/>
    <input type='mouse' bus='ps2'/>
    <graphics type='spice' autoport='yes' listen=''/>
$ virsh define /tmp/test.xml
$ valgrind -v virsh blockpull test /var/lib/libvirt/images/test --wait

actual result:

==10906== 1 errors in context 1 of 1:
==10906== Syscall param rt_sigaction(act->sa_flags) points to uninitialised byte(s)
==10906==    at 0x39CF80F5BE: __libc_sigaction (sigaction.c:67)
==10906==    by 0x43016C: cmdBlockPull (virsh.c:7638)
==10906==    by 0x4150D4: vshCommandRun (virsh.c:18574)
==10906==    by 0x425E73: main (virsh.c:20178)
==10906==  Address 0x7fefffae8 is on thread 1's stack

Signed-off-by: Alex Jia <ajia redhat com>
 tools/virsh.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index 95ed7bc..4e4ca57 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -7634,6 +7634,7 @@ cmdBlockPull(vshControl *ctl, const vshCmd *cmd)
         intCaught = 0;
         sig_action.sa_sigaction = vshCatchInt;
+        sig_action.sa_flags = 0;
         sigaction(SIGINT, &sig_action, &old_sig_action);

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