| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 093/156] IB/uverbs: reject invalid or unknown opcodes | Date | Tue, 20 Oct 2015 14:37:14 -0700 |
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3.19.8-ckt8 -stable review patch. If anyone has any objections, please let me know.
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From: Christoph Hellwig <hch@lst.de>
commit b632ffa7cee439ba5dce3b3bc4a5cbe2b3e20133 upstream.
We have many WR opcodes that are only supported in kernel space and/or require optional information to be copied into the WR structure. Reject all those not explicitly handled so that we can't pass invalid information to drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/infiniband/core/uverbs_cmd.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 6c52e72..f621c8d 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -2238,6 +2238,12 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, next->send_flags = user_wr->send_flags; if (is_ud) { + if (next->opcode != IB_WR_SEND && + next->opcode != IB_WR_SEND_WITH_IMM) { + ret = -EINVAL; + goto out_put; + } + next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext); if (!next->wr.ud.ah) { @@ -2277,9 +2283,11 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, user_wr->wr.atomic.compare_add; next->wr.atomic.swap = user_wr->wr.atomic.swap; next->wr.atomic.rkey = user_wr->wr.atomic.rkey; + case IB_WR_SEND: break; default: - break; + ret = -EINVAL; + goto out_put; } } -- 1.9.1
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