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(parent: 6f239c0) | 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 07:33:40 +0000 (08:33 +0100)
commitf376621861e3d8a713d6931f4363c4137912330b
tree806b9c145e42daaf2a7e4ca664a19298712c4e66tree | snapshot
parent6f239c0655cfe90c3e048bccb2e74ab1780cabbacommit | 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 | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git