The data->block[0] variable comes from user and is a number between
0-255. Without proper check, the variable may be very large to cause
an out-of-bounds when performing memcpy in slimpro_i2c_blkwr.
Fix this bug by checking the value of writelen.
Fixes: f6505fbabc42 ("i2c: add SLIMpro I2C device driver on APM X-Gene platform")
Signed-off-by: Wei Chen <harperchen1110(a)gmail.com>
Cc: stable(a)vger.kernel.org
---
Changes in v2:
- Put length check inside slimpro_i2c_blkwr
Changes in v3:
- Correct the format of patch
Changes in v4:
- CC stable email address
drivers/i2c/busses/i2c-xgene-slimpro.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c
index bc9a3e7e0c96..0f7263e2276a 100644
--- a/drivers/i2c/busses/i2c-xgene-slimpro.c
+++ b/drivers/i2c/busses/i2c-xgene-slimpro.c
@@ -308,6 +308,9 @@ static int slimpro_i2c_blkwr(struct slimpro_i2c_dev *ctx, u32 chip,
u32 msg[3];
int rc;
+ if (writelen > I2C_SMBUS_BLOCK_MAX)
+ return -EINVAL;
+
memcpy(ctx->dma_buffer, data, writelen);
paddr = dma_map_single(ctx->dev, ctx->dma_buffer, writelen,
DMA_TO_DEVICE);
--
2.25.1
OverCurrent condition is not standardized in the UHCI spec.
Zhaoxin UHCI controllers report OverCurrent bit active off.
In order to handle OverCurrent condition correctly, the uhci-hcd
driver needs to be told to expect the active-off behavior.
Suggested-by: Alan Stern <stern(a)rowland.harvard.edu>
Cc: stable(a)vger.kernel.org
Signed-off-by: Weitao Wang <WeitaoWang-oc(a)zhaoxin.com>
---
v1->v2
- Modify the description of this patch.
- Let Zhaoxin and VIA share a common oc_low flag
drivers/usb/host/uhci-pci.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c
index 3592f757fe05..034586911bb5 100644
--- a/drivers/usb/host/uhci-pci.c
+++ b/drivers/usb/host/uhci-pci.c
@@ -119,11 +119,12 @@ static int uhci_pci_init(struct usb_hcd *hcd)
uhci->rh_numports = uhci_count_ports(hcd);
- /* Intel controllers report the OverCurrent bit active on.
- * VIA controllers report it active off, so we'll adjust the
- * bit value. (It's not standardized in the UHCI spec.)
+ /* Intel controllers report the OverCurrent bit active on. VIA
+ * and ZHAOXIN controllers report it active off, so we'll adjust
+ * the bit value. (It's not standardized in the UHCI spec.)
*/
- if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
+ if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA ||
+ to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_ZHAOXIN)
uhci->oc_low = 1;
/* HP's server management chip requires a longer port reset delay. */
--
2.32.0