Re: [PATCH] net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory
From: David Miller <davem@davemloft.net>
Date: 2016-01-10 23:01:40
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From: Sasha Levin <redacted> Date: Thu, 7 Jan 2016 14:52:43 -0500
proc_dostring() needs an initialized destination string, while the one
provided in proc_sctp_do_hmac_alg() contains stack garbage.
Thus, writing to cookie_hmac_alg would strlen() that garbage and end up
accessing invalid memory.
Fixes: 3c68198e7 ("sctp: Make hmac algorithm selection for cookie generation dynamic")
Signed-off-by: Sasha Levin <redacted>Applied and queued up for -stable, thanks.