| Date | Sun, 13 Jan 2013 17:43:41 +0000 | From | Ben Hutchings <> | Subject | [ 46/49] RDMA/nes: Fix for crash when registering zero length MR for CQ |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
commit 7d9c199a55200c9b9fcad08e150470d02fb385be upstream.
Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/infiniband/hw/nes/nes_verbs.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c index c47ec25..07e4fba 100644 --- a/drivers/infiniband/hw/nes/nes_verbs.c +++ b/drivers/infiniband/hw/nes/nes_verbs.c @@ -2561,6 +2561,11 @@ static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, return ibmr; case IWNES_MEMREG_TYPE_QP: case IWNES_MEMREG_TYPE_CQ: + if (!region->length) { + nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n"); + ib_umem_release(region); + return ERR_PTR(-EINVAL); + } nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL); if (!nespbl) { nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
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