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Date: Sun, 6 Jan 2013 20:27:22 -0500 From: Nickolai Zeldovich <nickolai@...il.mit.edu> To: Lennert Buytenhek <buytenh@...tstofly.org>, "John W. Linville" <linville@...driver.com> Cc: Nickolai Zeldovich <nickolai@...il.mit.edu>, linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] drivers/net/wireless/mwl8k.c: avoid use-after-free Do not dereference p->station_id after kfree(cmd) because p points into the cmd data structure. Signed-off-by: Nickolai Zeldovich <nickolai@...il.mit.edu> --- drivers/net/wireless/mwl8k.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c index f221b95..83564d3 100644 --- a/drivers/net/wireless/mwl8k.c +++ b/drivers/net/wireless/mwl8k.c @@ -4250,9 +4250,11 @@ static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw, p->amsdu_enabled = 0; rc = mwl8k_post_cmd(hw, &cmd->header); + if (!rc) + rc = p->station_id; kfree(cmd); - return rc ? rc : p->station_id; + return rc; } static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw, -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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