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IB/mlx5: Change vma from shared to private

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[ Upstream commit 1377661298 ]

Anonymous VMA (->vm_ops == NULL) cannot be shared, otherwise
it would lead to SIGBUS.

Remove the shared flags from the vma after we change it to be
anonymous.

This is easily reproduced by doing modprobe -r while running a
user-space application such as raw_ethernet_bw.

Fixes: 7c2344c3bb ('IB/mlx5: Implements disassociate_ucontext API')
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maor Gottlieb
2017-03-29 06:03:03 +03:00
committed by Greg Kroah-Hartman
parent 9238066e28
commit c404dff487
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/hw/mlx5/main.c
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@@ -1323,6 +1323,7 @@ static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
/* context going to be destroyed, should
* not access ops any more.
*/
vma->vm_flags &= ~(VM_SHARED | VM_MAYSHARE);
vma->vm_ops = NULL;
list_del(&vma_private->list);
kfree(vma_private);