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authorDavid Linares <dlinares.linux@gmail.com>2013-03-25 10:50:27 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-25 10:57:37 -0700
commit769d7368b1727b1b5369d88badf0cbdf0163e079 (patch)
tree29fabb4a85ce78d944ac28154b63c71f57ad4cdd /drivers/usb/class/cdc-wdm.c
parent5410a473fb7a466020af31e8b400c2d14ed94925 (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