From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Deren Wu <deren.wu@mediatek.com>,
Lorenzo Bianconi <lorenzo@kernel.org>,
Sean Wang <sean.wang@mediatek.com>, Felix Fietkau <nbd@nbd.name>,
Sasha Levin <sashal@kernel.org>,
lorenzo.bianconi83@gmail.com, ryder.lee@mediatek.com,
kvalo@kernel.org, davem@davemloft.net, kuba@kernel.org,
pabeni@redhat.com, matthias.bgg@gmail.com,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Subject: [PATCH AUTOSEL 5.16 099/109] mt76: fix monitor mode crash with sdio driver
Date: Fri, 1 Apr 2022 10:32:46 -0400 [thread overview]
Message-ID: <20220401143256.1950537-99-sashal@kernel.org> (raw)
In-Reply-To: <20220401143256.1950537-1-sashal@kernel.org>
From: Deren Wu <deren.wu@mediatek.com>
[ Upstream commit 123bc712b1de0805f9d683687e17b1ec2aba0b68 ]
mt7921s driver may receive frames with fragment buffers. If there is a
CTS packet received in monitor mode, the payload is 10 bytes only and
need 6 bytes header padding after RXD buffer. However, only RXD in the
first linear buffer, if we pull buffer size RXD-size+6 bytes with
skb_pull(), that would trigger "BUG_ON(skb->len < skb->data_len)" in
__skb_pull().
To avoid the nonlinear buffer issue, enlarge the RXD size from 128 to
256 to make sure all MCU operation in linear buffer.
[ 52.007562] kernel BUG at include/linux/skbuff.h:2313!
[ 52.007578] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[ 52.007987] pc : skb_pull+0x48/0x4c
[ 52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common]
[ 52.008361] Call trace:
[ 52.008377] skb_pull+0x48/0x4c
[ 52.008400] mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c]
[ 52.008431] __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917]
[ 52.008449] kthread+0x148/0x3ac
[ 52.008466] ret_from_fork+0x10/0x30
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mt76.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index e2da720a91b6..f740a8ba164d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -19,7 +19,7 @@
#define MT_MCU_RING_SIZE 32
#define MT_RX_BUF_SIZE 2048
-#define MT_SKB_HEAD_LEN 128
+#define MT_SKB_HEAD_LEN 256
#define MT_MAX_NON_AQL_PKT 16
#define MT_TXQ_FREE_THR 32
--
2.34.1
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prev parent reply other threads:[~2022-04-01 14:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220401143256.1950537-1-sashal@kernel.org>
2022-04-01 14:31 ` [PATCH AUTOSEL 5.16 029/109] mt76: mt7921: fix crash when startup fails Sasha Levin
2022-04-01 14:31 ` [PATCH AUTOSEL 5.16 030/109] mt76: dma: initialize skip_unmap in mt76_dma_rx_fill Sasha Levin
2022-04-01 14:31 ` [PATCH AUTOSEL 5.16 039/109] PCI: aardvark: Fix support for MSI interrupts Sasha Levin
2022-04-01 14:31 ` [PATCH AUTOSEL 5.16 040/109] iommu/arm-smmu-v3: fix event handling soft lockup Sasha Levin
2022-04-01 14:31 ` [PATCH AUTOSEL 5.16 042/109] KVM: arm64: Do not change the PMU event filter after a VCPU has run Sasha Levin
2022-04-01 14:32 ` [PATCH AUTOSEL 5.16 069/109] mt76: mt7915: fix injected MPDU transmission to not use HW A-MSDU Sasha Levin
2022-04-01 14:32 ` [PATCH AUTOSEL 5.16 072/109] mt76: mt7615: Fix assigning negative values to unsigned variable Sasha Levin
2022-04-01 14:32 ` [PATCH AUTOSEL 5.16 080/109] iommu/iova: Improve 32-bit free space estimate Sasha Levin
2022-04-01 14:32 ` Sasha Levin [this message]
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