Re: [libvirt] [PATCH] virEventPollDispatchHandles: Honour array boundaries

When dispatching events from the event loop, the array of registered handles is searched to see what handles happened an event on. However, the array is searched in weird way: the check for the array boundaries is at the end, so we may touch the elements after the end of the array: ==10434== Invalid read of size 4 ==10434== at 0x52D06B6: virEventPollDispatchHandles (vireventpoll.c:486) ==10434== by 0x52D10E4: virEventPollRunOnce (vireventpoll.c:660) ==10434== by 0x52CF207: virEventRunDefaultImpl (virevent.c:308) ==10434== by 0x1639D1: virNetServerRun (virnetserver.c:1139) ==10434== by 0x1220DC: main (libvirtd.c:1507) ==10434== Address 0xc11ff04 is 4 bytes after a block of size 960 alloc'd ==10434== at 0x4C2CA5E: realloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==10434== by 0x52AD378: virReallocN (viralloc.c:245) ==10434== by 0x52AD46E: virExpandN (viralloc.c:294) ==10434== by 0x52AD5B1: virResizeN (viralloc.c:352) ==10434== by 0x52CF2EC: virEventPollAddHandle (vireventpoll.c:116) ==10434== by 0x52CEF5B: virEventAddHandle (virevent.c:78) ==10434== by 0x11F69A90: nodeStateInitialize (node_device_udev.c:1797) ==10434== by 0x53C3C89: virStateInitialize (libvirt.c:743) ==10434== by 0x120563: daemonRunStateInit (libvirtd.c:919) ==10434== by 0x5317719: virThreadHelper (virthread.c:197) ==10434== by 0x8376F39: start_thread (in /lib64/libpthread-2.17.so) ==10434== by 0x8A7F9FC: clone (in /lib64/libc-2.17.so) Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/util/vireventpoll.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)