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mwifiex: sdio: fix use after free issue for save_adapter

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[ 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@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amitkumar Karwar 2016-12-01 19:23:31 +05:30 committed by Greg Kroah-Hartman
parent b1d4d0e150
commit 5553271f77
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wireless/marvell/mwifiex/sdio.c
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@ -2296,6 +2296,12 @@ 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);
}