mt76: fix potential DMA mapping leak

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commit b4403cee64 upstream.

With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmap
could potentially inherit a non-zero value from stack garbage.
If this happens, it will cause DMA mappings for MCU command frames to not be
unmapped after completion

Fixes: 27d5c528a7 ("mt76: fix double DMA unmap of the first buffer on 7615/7915")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Felix Fietkau 2021-03-23 22:47:37 +01:00 • committed by Greg Kroah-Hartman

parent 95fb153c60

commit 9fa26701cd

1 changed files with 1 additions and 1 deletions

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drivers/net/wireless/mediatek/mt76/dma.c

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