On Tue, Aug 22, 2017 at 05:41:03PM -0700, Megha Dey wrote:

It was reported that the sha1 AVX2 function(sha1_transform_avx2) is
reading ahead beyond its intended data, and causing a crash if the next
block is beyond page boundary:
http://marc.info/?l=linux-crypto-vger&m=149373371023377

This patch makes sure that there is no overflow for any buffer length.

It passes the tests written by Jan Stancek that revealed this problem:
https://github.com/jstancek/sha1-avx2-crash

This patch fixes reads beyond the number of blocks in the same way it
was done in commit 8861249c740fc4af9ddc5aee321eafefb960d7c6
("crypto: x86/sha1 : Fix reads beyond the number of blocks passed").

So all you really want is that specific commit added to the stable
kernels?  If so, what kernel tree(s)?

thanks,

greg k-h