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(parent: 4da64fe) | patch
mt76: fix potential DMA mapping leak
authorFelix Fietkau <nbd@nbd.name>
Tue, 23 Mar 2021 21:47:37 +0000 (22:47 +0100)
committerFelix Fietkau <nbd@nbd.name>
Mon, 12 Apr 2021 21:07:24 +0000 (23:07 +0200)
commitb4403cee6400c5f679e9c4a82b91d61aa961eccf
treeae283c2ac5dedbe6b425dce756c38af8a999f85btree | snapshot
parent4da64fe086d95daa66d0def40fbd1b02d4f813fdcommit | diff
mt76: fix potential DMA mapping leak

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: 27d5c528a7ca ("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>
drivers/net/wireless/mediatek/mt76/dma.c diff | blob | history
Domain: System / Kernel;