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(parent: efe3058) | patch
net: cdc_ether: fix divide by 0 on bad descriptors
authorBjørn Mork <bjorn@mork.no>
Mon, 6 Nov 2017 14:37:22 +0000 (15:37 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 24 Nov 2017 07:35:56 +0000 (08:35 +0100)
commitf99427bc5d83e5c8546560c006effa91592cfcc4
tree31c826316f5223e58520c56b3147f5047f44f35ftree | snapshot
parentefe3058c6214b29016a93d59bde0955d3bfc3291commit | diff
net: cdc_ether: fix divide by 0 on bad descriptors

[ Upstream commit 2cb80187ba065d7decad7c6614e35e07aec8a974 ]

Setting dev->hard_mtu to 0 will cause a divide error in
usbnet_probe. Protect against devices with bogus CDC Ethernet
functional descriptors by ignoring a zero wMaxSegmentSize.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/usb/cdc_ether.c diff | blob | history
wrapfs-4.13.y