RDMA/irdma: Prevent user-triggered null deref on QP create

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Previously, the user QP creation path would only attempt to
populate iwqp->iwpbl if the user-provided req.user_wqe_bufs
field was non-zero. The problem is that iwqp->iwpbl is
unconditionally dereferenced later on in irdma_setup_virt_qp.

While there was a check for iwqp->iwpbl != NULL, this check
would only occur if req.user_wqe_bufs was non-zero. The end
result is that a user could send a zero user_wqe_bufs value
and trigger a null ptr deref.

Fix this by unconditionally calling irdma_get_pbl and bailing
if it fails, similar to the CQ and SRQ paths.

Fixes: b48c24c2d7 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Jacob Moroni <jmoroni@google.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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Jacob Moroni 2026-06-17 16:40:13 +00:00 • committed by Leon Romanovsky

parent b38f98e176

commit d32fe5bb41

1 changed files with 10 additions and 11 deletions

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19

drivers/infiniband/hw/irdma/verbs.c

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