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OpenCloudOS-Kernel
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RDMA/mlx4: Don't crash machine if zap_vma_ptes() fails 

The failure reported by zap_vma_ptes() means that wrong VMA pages
were supplied, however it is impossible for this type of address.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Leon Romanovsky 2018-05-29 15:14:06 +03:00 committed by Doug Ledford
parent 2cb4079188
commit 7fc8ff267d
1 changed files with 2 additions and 8 deletions
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10
drivers/infiniband/hw/mlx4/main.c
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@ -1186,7 +1186,6 @@ static const struct vm_operations_struct mlx4_ib_vm_ops = {
static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
{
int i;
int ret = 0;
struct vm_area_struct *vma;
struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
@ -1198,13 +1197,8 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
if (!vma)
continue;
ret = zap_vma_ptes(context->hw_bar_info[i].vma,
context->hw_bar_info[i].vma->vm_start,
PAGE_SIZE);
if (ret) {
pr_err("Error: zap_vma_ptes failed for index=%d, ret=%d\n", i, ret);
BUG_ON(1);
}
zap_vma_ptes(context->hw_bar_info[i].vma,
context->hw_bar_info[i].vma->vm_start, PAGE_SIZE);
context->hw_bar_info[i].vma->vm_flags &=
~(VM_SHARED | VM_MAYSHARE);