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authorjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-12-13 18:46:25 +0000
committerjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-12-13 18:46:25 +0000
commite363f1c071b5962b9582ee0fa3261a531cdf67e5 (patch)
tree1ad17c0c460e7cdc4c6a347fb3e3e6e37f7296f1 /target/linux
parent05f3672d357d01224f0cc2e0885910a973cefd6c (diff)
downloadopenwrt-e363f1c071b5962b9582ee0fa3261a531cdf67e5.tar.gz
openwrt-e363f1c071b5962b9582ee0fa3261a531cdf67e5.zip
AA: kernel: fix solos-pci skb double-free in DMA mode
Backport of r34667. [juhosg: refresh the patches with quilt] Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Gabor Juhos <juhosg@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@34668 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/generic/patches-3.3/132-solos-dma.patch33
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.3/132-solos-dma.patch b/target/linux/generic/patches-3.3/132-solos-dma.patch
new file mode 100644
index 000000000..9e7eb821d
--- /dev/null
+++ b/target/linux/generic/patches-3.3/132-solos-dma.patch
@@ -0,0 +1,33 @@
+From cae49ede00ec3d0cda290b03fee55b72b49efc11 Mon Sep 17 00:00:00 2001
+From: David Woodhouse <dwmw2@infradead.org>
+Date: Tue, 11 Dec 2012 14:57:14 +0000
+Subject: [PATCH] solos-pci: fix double-free of TX skb in DMA mode
+
+We weren't clearing card->tx_skb[port] when processing the TX done interrupt.
+If there wasn't another skb ready to transmit immediately, this led to a
+double-free because we'd free it *again* next time we did have a packet to
+send.
+
+Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
+Cc: stable@kernel.org
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/atm/solos-pci.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+--- a/drivers/atm/solos-pci.c
++++ b/drivers/atm/solos-pci.c
+@@ -945,10 +945,11 @@ static uint32_t fpga_tx(struct solos_car
+ for (port = 0; tx_pending; tx_pending >>= 1, port++) {
+ if (tx_pending & 1) {
+ struct sk_buff *oldskb = card->tx_skb[port];
+- if (oldskb)
++ if (oldskb) {
+ pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
+ oldskb->len, PCI_DMA_TODEVICE);
+-
++ card->tx_skb[port] = NULL;
++ }
+ spin_lock(&card->tx_queue_lock);
+ skb = skb_dequeue(&card->tx_queue[port]);
+ if (!skb)