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RDMA: Check umem pointer validity prior to release

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Update ib_umem_release() to behave similarly to kfree() and allow
submitting NULL pointer as safe input to this function.

Fixes: a52c8e2469 ("RDMA: Clean destroy CQ in drivers do not return errors")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Leon Romanovsky
2019-06-16 15:05:20 +03:00
committed by Doug Ledford
parent 89a6da3cb8
commit 836a0fbb3e
26 changed files with 73 additions and 132 deletions
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3
drivers/infiniband/hw/cxgb3/iwch_provider.c
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@@ -346,8 +346,7 @@ static int iwch_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata)
xa_erase_irq(&rhp->mrs, mmid);
if (mhp->kva)
kfree((void *) (unsigned long) mhp->kva);
if (mhp->umem)
ib_umem_release(mhp->umem);
ib_umem_release(mhp->umem);
pr_debug("%s mmid 0x%x ptr %p\n", __func__, mmid, mhp);
kfree(mhp);
return 0;