Re: [patch v2] wan/x25_asy: integer overflow in x25_asy_change_mtu()

From: Dan Carpenter <redacted>
Date: Thu, 17 Jul 2014 13:50:45 +0300

If "newmtu * 2 + 4" is too large then it can cause an integer overflow
leading to memory corruption.  Eric Dumazet suggests that 65534 is a
reasonable upper limit.

Btw, "newmtu" is not allowed to be a negative number because of the
check in dev_set_mtu(), so that's ok.

Signed-off-by: Dan Carpenter <redacted>
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v2: Cap it at 65534 instead of just testing for integer overflows.
    Thanks David and Eric!

Applied.