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Oliver Neukum |
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From a8e083ee8e2a6c94c29733835adae8bf5b832748 Mon Sep 17 00:00:00 2001
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Oliver Neukum |
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From: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
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Oliver Neukum |
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Date: Fri, 2 Apr 2021 11:26:27 -0700
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Oliver Neukum |
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Subject: [PATCH] mwl8k: Fix a double Free in mwl8k_probe_hw
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Oliver Neukum |
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Git-commit: a8e083ee8e2a6c94c29733835adae8bf5b832748
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Oliver Neukum |
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References: git-fixes
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Oliver Neukum |
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Patch-mainline: v5.13-rc1
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Oliver Neukum |
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Oliver Neukum |
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In mwl8k_probe_hw, hw->priv->txq is freed at the first time by
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Oliver Neukum |
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dma_free_coherent() in the call chain:
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Oliver Neukum |
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if(!priv->ap_fw)->mwl8k_init_txqs(hw)->mwl8k_txq_init(hw, i).
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Oliver Neukum |
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Oliver Neukum |
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Then in err_free_queues of mwl8k_probe_hw, hw->priv->txq is freed
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Oliver Neukum |
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at the second time by mwl8k_txq_deinit(hw, i)->dma_free_coherent().
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Oliver Neukum |
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Oliver Neukum |
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My patch set txq->txd to NULL after the first free to avoid the
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Oliver Neukum |
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double free.
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Oliver Neukum |
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Oliver Neukum |
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Fixes: a66098daacee2 ("mwl8k: Marvell TOPDOG wireless driver")
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Oliver Neukum |
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Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
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Oliver Neukum |
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Oliver Neukum |
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Link: https://lore.kernel.org/r/20210402182627.4256-1-lyl2019@mail.ustc.edu.cn
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Oliver Neukum |
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Signed-off-by: Oliver Neukum <oneukum@suse.com>
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Oliver Neukum |
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---
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Oliver Neukum |
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drivers/net/wireless/marvell/mwl8k.c | 1 +
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Oliver Neukum |
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1 file changed, 1 insertion(+)
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Oliver Neukum |
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Oliver Neukum |
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--- a/drivers/net/wireless/marvell/mwl8k.c
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Oliver Neukum |
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+++ b/drivers/net/wireless/marvell/mwl8k.c
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Oliver Neukum |
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@@ -1469,6 +1469,7 @@ static int mwl8k_txq_init(struct ieee802
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Oliver Neukum |
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txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
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Oliver Neukum |
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if (txq->skb == NULL) {
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Oliver Neukum |
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pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
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Oliver Neukum |
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+ txq->txd = NULL;
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Oliver Neukum |
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return -ENOMEM;
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Oliver Neukum |
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}
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Oliver Neukum |
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