This is a note to let you know that I've just added the patch titled mwifiex: sdio: fix use after free issue for save_adapter to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mwifiex-sdio-fix-use-after-free-issue-for-save_adapter.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Tue Nov 28 10:49:28 CET 2017 From: Amitkumar Karwar <akarwar@xxxxxxxxxxx> Date: Thu, 1 Dec 2016 19:23:31 +0530 Subject: mwifiex: sdio: fix use after free issue for save_adapter From: Amitkumar Karwar <akarwar@xxxxxxxxxxx> [ Upstream commit 74c8719b8ee0922593a5cbec0bd6127d86d8a2f4 ] 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@xxxxxxxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/marvell/mwifiex/sdio.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/net/wireless/marvell/mwifiex/sdio.c +++ b/drivers/net/wireless/marvell/mwifiex/sdio.c @@ -2296,6 +2296,12 @@ static void mwifiex_recreate_adapter(str 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); } Patches currently in stable-queue which might be from akarwar@xxxxxxxxxxx are queue-4.9/mwifiex-sdio-fix-use-after-free-issue-for-save_adapter.patch