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Commit 13776612 authored by Maor Gottlieb's avatar Maor Gottlieb Committed by Doug Ledford
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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: 7c2344c3 ('IB/mlx5: Implements disassociate_ucontext API')
Signed-off-by: default avatarMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent ecc7d83b

drivers/infiniband/hw/mlx5/main.c

+1 −0
Original line number Diff line number Diff line
@@ -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);