[RESEND-2][PATCH][BZ 13761] Fix allocation in nss_compat for large number of memberships to a group

[Andreas Jaeger]

On 03/26/2012 08:22 AM, Siddhesh Poyarekar wrote:
> Hi,
>
> Resending once again:
>
> nss_compat allocates buffer space on stack using alloca (and
> extend_alloca) for initgroup and keeps extending it to fit in larger
> lines. This breaks for cases where the number of members in a gorup
> are very large, causing the alloca reference to go beyond thread stack
> boundary. Attached patch falls back to malloc/free if the buffer size
> needed is beyond __libc_alloca_cutoff.

Please state in your submission how and where this was tested.

The patch itself looks fine to me but I'd like to hear about testing,

Andreas
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