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| author |   Kevin McKinney <klmckinney1@gmail.com> | 2011-11-06 09:40:11 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-26 17:11:58 -0800 |
| commit | 41c7b7c0fa2f68afb1154e88597ff6b9b97334cf (patch) | |
| tree | 37f8f318c8c02d890be2b77f3ad625a460ef14f5 /drivers/staging/bcm/InterfaceDld.c | |
| parent | Staging: bcm: hostmibs: Added temporary variable to shorten lines (diff) | |
| download | linux-dev-41c7b7c0fa2f68afb1154e88597ff6b9b97334cf.tar.xz linux-dev-41c7b7c0fa2f68afb1154e88597ff6b9b97334cf.zip | |
Staging: bcm: Fix information leak in ioctl: IOCTL_BCM_REGISTER_READ_PRIVATE, IOCTL_BCM_EEPROM_REGISTER_READ
This patch fixes an information leak in ioctl
IOCTL_BCM_REGISTER_READ_PRIVATE and
IOCTL_BCM_EEPROM_REGISTER_READ when determining
the number of bytes to copy to user space. Function,
usb_control_msg, returns the correct number of
bytes from the hardware. Instead of using
this value, we were using a value derived from
user space. In this case, this value could be more
than the hardware allocated. Therefore, this
patch copies the proper number of bytes from
the hardware, and uses this value as the maximum
number of bytes for user space.
Signed-off-by: Kevin McKinney <klmckinney1@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/bcm/InterfaceDld.c')
| -rw-r--r-- | drivers/staging/bcm/InterfaceDld.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/staging/bcm/InterfaceDld.c b/drivers/staging/bcm/InterfaceDld.c index bcd86bbef2fd..65c352f35681 100644 --- a/drivers/staging/bcm/InterfaceDld.c +++ b/drivers/staging/bcm/InterfaceDld.c @@ -62,6 +62,7 @@ int InterfaceFileReadbackFromChip(PVOID arg, struct file *flp, unsigned int on_c static int fw_down; INT Status = STATUS_SUCCESS; PS_INTERFACE_ADAPTER psIntfAdapter = (PS_INTERFACE_ADAPTER)arg; + int bytes; buff = kmalloc(MAX_TRANSFER_CTRL_BYTE_USB, GFP_DMA); buff_readback = kmalloc(MAX_TRANSFER_CTRL_BYTE_USB , GFP_DMA); @@ -94,8 +95,9 @@ int InterfaceFileReadbackFromChip(PVOID arg, struct file *flp, unsigned int on_c break; } - Status = InterfaceRDM(psIntfAdapter, on_chip_loc, buff_readback, len); - if (Status) { + bytes = InterfaceRDM(psIntfAdapter, on_chip_loc, buff_readback, len); + if (bytes < 0) { + Status = bytes; BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "RDM of len %d Failed! %d", len, reg); goto exit; } @@ -302,6 +304,7 @@ static INT buffRdbkVerify(PMINI_ADAPTER Adapter, PUCHAR mappedbuffer, UINT u32Fi UINT len = u32FirmwareLength; INT retval = STATUS_SUCCESS; PUCHAR readbackbuff = kzalloc(MAX_TRANSFER_CTRL_BYTE_USB, GFP_KERNEL); + int bytes; if (NULL == readbackbuff) { BCM_DEBUG_PRINT(Adapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "MEMORY ALLOCATION FAILED"); @@ -310,9 +313,10 @@ static INT buffRdbkVerify(PMINI_ADAPTER Adapter, PUCHAR mappedbuffer, UINT u32Fi while (u32FirmwareLength && !retval) { len = MIN_VAL(u32FirmwareLength, MAX_TRANSFER_CTRL_BYTE_USB); - retval = rdm(Adapter, u32StartingAddress, readbackbuff, len); + bytes = rdm(Adapter, u32StartingAddress, readbackbuff, len); - if (retval) { + if (bytes < 0) { + retval = bytes; BCM_DEBUG_PRINT(Adapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "rdm failed with status %d", retval); break; } |