From: Brian Norris Date: Tue, 28 Mar 2017 23:59:32 +0000 (-0700) Subject: mwifiex: fix use-after-free for FW reinit errors X-Git-Tag: v4.14-rc1~960^3~211^2~16 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ce8fad9a1f09009ec3918a99685d9e3176f50ce3;p=platform%2Fkernel%2Flinux-rpi.git mwifiex: fix use-after-free for FW reinit errors If we fail to reinit the FW when resetting the device (in the synchronous version of mwifiex_init_hw_fw() -> mwifiex_fw_dpc()), mwifiex_fw_dpc() will tear down the interface and free up the adapter. But we don't actually check for all failure cases of mwifiex_fw_dpc(), so some of them fall through and dereference adapter->fw_done with a freed adapter, causing a use-after-free bug. In any case, mwifiex_fw_dpc() will always signal FW completion -- in the error OR success case -- so at best, this was repeat work. Let's not do it. Signed-off-by: Brian Norris Signed-off-by: Kalle Valo --- diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c index 30f4994..98c8345 100644 --- a/drivers/net/wireless/marvell/mwifiex/main.c +++ b/drivers/net/wireless/marvell/mwifiex/main.c @@ -1475,7 +1475,6 @@ mwifiex_reinit_sw(struct mwifiex_adapter *adapter) } mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__); - complete_all(adapter->fw_done); return 0; err_init_fw: