Commit 74c8719b authored Dec 01, 2016 by Amitkumar Karwar Committed by Kalle Valo Dec 30, 2016

mwifiex: sdio: fix use after free issue for save_adapter



If we have sdio work requests received when sdio card reset is
happening, we may end up accessing older save_adapter pointer
later which is already freed during card reset.
This patch solves the problem by cancelling those pending requests.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

parent d15697de

drivers/net/wireless/marvell/mwifiex/sdio.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -2237,6 +2237,12 @@ static void mwifiex_recreate_adapter(struct sdio_mmc_card *card)
		mmc_hw_reset(func->card->host);
		sdio_release_host(func);

		/* Previous save_adapter won't be valid after this. We will cancel
		* pending work requests.
		*/
		clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags);
		clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags);

		mwifiex_sdio_probe(func, device_id);
		}