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iw_cxgb4: Fix potential NULL dereference in c4iw_fill_res_cm_id_entry()

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[ Upstream commit 4ca446b127 ]

This condition needs to match the previous "if (epcp->state == LISTEN) {"
exactly to avoid a NULL dereference of either "listen_ep" or "ep". The
problem is that "epcp" has been re-assigned so just testing
"if (epcp->state == LISTEN) {" a second time is not sufficient.

Fixes: 116aeb8873 ("iw_cxgb4: provide detailed provider-specific CM_ID information")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/Y+usKuWIKr4dimZh@kili
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2023-02-14 18:43:38 +03:00 committed by Greg Kroah-Hartman
parent f139c15c6c
commit 24278dc380
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/cxgb4/restrack.c
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@ -238,7 +238,7 @@ int c4iw_fill_res_cm_id_entry(struct sk_buff *msg,
if (rdma_nl_put_driver_u64_hex(msg, "history", epcp->history))
goto err_cancel_table;
if (epcp->state == LISTEN) {
if (listen_ep) {
if (rdma_nl_put_driver_u32(msg, "stid", listen_ep->stid))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "backlog", listen_ep->backlog))