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IB/mlx5: Change vma from shared to private 

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>
zero-colors
Maor Gottlieb 2017-03-29 06:03:03 +03:00 committed by Doug Ledford
parent ecc7d83be3
commit 1377661298
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/hw/mlx5/main.c
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@ -1488,6 +1488,7 @@ 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);