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RDMA/nes: Fix for crash when registering zero length MR for CQ

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commit 7d9c199a55 upstream.

Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tatyana Nikolova 2012-12-06 20:05:02 +00:00 committed by Greg Kroah-Hartman
parent c7cde2b3d2
commit e5ca2896f8
1 changed files with 5 additions and 0 deletions
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5
drivers/infiniband/hw/nes/nes_verbs.c
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@ -2559,6 +2559,11 @@ 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");