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| author | David Linares <dlinares.linux@gmail.com> | 2013-03-25 10:50:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-25 10:57:37 -0700 |
| commit | 769d7368b1727b1b5369d88badf0cbdf0163e079 (patch) | |
| tree | 29fabb4a85ce78d944ac28154b63c71f57ad4cdd /drivers/usb/class/cdc-wdm.c | |
| parent | 5410a473fb7a466020af31e8b400c2d14ed94925 (diff) | |
USB: hub: Avoid NULL pointer dereference when hub doesn't have any ports
Return an error if hub->descriptor->bNbrPorts==0. Without this additional
check, we can end up doing a "hub->ports = kzalloc(0, GFP_KERNEL)".
This hub->ports pointer will therefore be non-NULL and will be used.
Example of dmesg:
INIT: usb 1-1: New USB device found, idVendor=0424, idProduct=2512
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
hub 1-1:1.0: USB hub found
version 2.86 bootinghub 1-1:1.0: 0 ports detected
Unable to handle kernel NULL pointer dereference at virtual address 00000010
Signed-off-by: David Linares <dlinares.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-wdm.c')
0 files changed, 0 insertions, 0 deletions