[PATCH AUTOSEL 4.9 10/91] libertas: fix a potential NULL pointer dereference
From: Sasha Levin <sashal@kernel.org>
Date: 2019-12-10 22:44:56
Also in:
linux-wireless, lkml, stable
Subsystem:
marvell libertas wireless driver, the rest · Maintainer:
Linus Torvalds
From: Allen Pais <redacted> [ Upstream commit 7da413a18583baaf35dd4a8eb414fa410367d7f2 ] alloc_workqueue is not checked for errors and as a result, a potential NULL dereference could occur. Signed-off-by: Allen Pais <redacted> Signed-off-by: Kalle Valo <redacted> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/wireless/marvell/libertas/if_sdio.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/marvell/libertas/if_sdio.c b/drivers/net/wireless/marvell/libertas/if_sdio.c
index 06a57c7089920..44da911c9a1a8 100644
--- a/drivers/net/wireless/marvell/libertas/if_sdio.c
+++ b/drivers/net/wireless/marvell/libertas/if_sdio.c@@ -1229,6 +1229,10 @@ static int if_sdio_probe(struct sdio_func *func, spin_lock_init(&card->lock); card->workqueue = alloc_workqueue("libertas_sdio", WQ_MEM_RECLAIM, 0); + if (unlikely(!card->workqueue)) { + ret = -ENOMEM; + goto err_queue; + } INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker); init_waitqueue_head(&card->pwron_waitq);
@@ -1282,6 +1286,7 @@ static int if_sdio_probe(struct sdio_func *func, lbs_remove_card(priv); free: destroy_workqueue(card->workqueue); +err_queue: while (card->packets) { packet = card->packets; card->packets = card->packets->next;
--
2.20.1