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Re: [PATCH] linear-assignment: fix potential out of bounds memory access (was: Re: Git 2.19 Segmentation fault 11 on macOS)




On Wed, Sep 12, 2018 at 3:01 PM Thomas Gummerer <t.gummerer@xxxxxxxxx> wrote:
> Subject: [PATCH] linear-assignment: fix potential out of bounds memory access
>
> Currently the 'compute_assignment()' function can may read memory out

"can may"?

> of bounds, even if used correctly.  Namely this happens when we only
> have one column.  In that case we try to calculate the initial
> minimum cost using '!j1' as column in the reduction transfer code.
> That in turn causes us to try and get the cost from column 1 in the
> cost matrix, which does not exist, and thus results in an out of
> bounds memory read.