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| author | Maor Gottlieb <maorg@mellanox.com> | 2017-03-29 06:03:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-24 10:58:43 +0100 |
| commit | 136532e7c142f2345493c21c82c6ce4f8981aefe (patch) | |
| tree | 2ae936d9cea003f06bce04642480e93d93b3703a /drivers/infiniband | |
| parent | b5834cc1690102c46f839ac4cbfb1f44c06ad1da (diff) | |
| download | linux-stable-136532e7c142f2345493c21c82c6ce4f8981aefe.tar.gz linux-stable-136532e7c142f2345493c21c82c6ce4f8981aefe.tar.bz2 linux-stable-136532e7c142f2345493c21c82c6ce4f8981aefe.zip | |
IB/mlx4: Change vma from shared to private
[ Upstream commit ca37a664a8e4e9988b220988ceb4d79e3316f195 ]
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: ae184ddeca5db ('IB/mlx4_ib: Disassociate support')
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>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 9119e0b3c2b8..67c4c73343d4 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -1055,6 +1055,8 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) 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->hw_bar_info[i].vma->vm_ops = NULL; } |