[Qemu-devel] [PULL 2/4] pci-assign: Fix potential read beyond buffer on -EBUSY

[Alex Williamson]

From: Markus Armbruster <address@hidden>

readlink() doesn't write a terminating null byte.
assign_failed_examine() passes the unterminated string to strrchr().
Oops.  Terminate it.

Spotted by Coverity.

Signed-off-by: Markus Armbruster <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Alex Williamson <address@hidden>
---
 hw/i386/kvm/pci-assign.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index 9686801..a825871 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -743,6 +743,7 @@ static void assign_failed_examine(AssignedDevice *dev)
         goto fail;
     }
 
+    driver[r] = 0;
     ns = strrchr(driver, '/');
     if (!ns) {
         goto fail;