RDMA/siw: Fix potential siw_mem refcnt leak in siw_fastreg_mr()

siw_fastreg_mr() invokes siw_mem_id2obj(), which returns a local reference
of the siw_mem object to "mem" with increased refcnt.  When
siw_fastreg_mr() returns, "mem" becomes invalid, so the refcount should be
decreased to keep refcount balanced.

The issue happens in one error path of siw_fastreg_mr(). When "base_mr"
equals to NULL but "mem" is not NULL, the function forgets to decrease the
refcnt increased by siw_mem_id2obj() and causes a refcnt leak.

Reorganize the flow so that the goto unwind can be used as expected.

Fixes: b9be6f18cf9e ("rdma/siw: transmit path")
Link: https://lore.kernel.org/r/[email protected]
Reported-by: Xiyu Yang <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

0 files changed, 0 insertions, 0 deletions