Commit ca37a664 authored by Maor Gottlieb's avatar Maor Gottlieb Committed by Doug Ledford

IB/mlx4: 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: ae184dde ('IB/mlx4_ib: Disassociate support')
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 22c3653d
...@@ -1187,6 +1187,8 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) ...@@ -1187,6 +1187,8 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
BUG_ON(1); BUG_ON(1);
} }
context->hw_bar_info[i].vma->vm_flags &=
~(VM_SHARED | VM_MAYSHARE);
/* context going to be destroyed, should not access ops any more */ /* context going to be destroyed, should not access ops any more */
context->hw_bar_info[i].vma->vm_ops = NULL; context->hw_bar_info[i].vma->vm_ops = NULL;
} }
......
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