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dm: check pci_vdev before using

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acrn-dm runs to segmentation fault when failed to create VMs with
improper parameters.

If vdevs failed to be created, they are still be freed in deinit(),
and dereference the null pointers leads to segfault.

Signed-off-by: Xinyun Liu <xinyun.liu@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Xinyun Liu
2018-06-19 15:25:20 +08:00
committed by lijinxia
parent 685d82cdcc
commit fb723efa48
1 changed files with 1 additions and 1 deletions
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2
devicemodel/hw/pci/core.c
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@@ -821,7 +821,7 @@ static void
pci_emul_deinit(struct vmctx *ctx, struct pci_vdev_ops *ops, int bus, int slot,
int func, struct funcinfo *fi)
{
if (ops->vdev_deinit)
if (ops->vdev_deinit && fi->fi_devi)
(*ops->vdev_deinit)(ctx, fi->fi_devi, fi->fi_param);
if (fi->fi_param)
free(fi->fi_param);