Re: [PATCH v2 1/1] net: netlink: Fix multicast group storage allocation for families with more than one groups

From: Matti Vaittinen <redacted>
Date: Wed, 13 Jan 2016 09:54:12 +0200

Hello again,

      Second version, Fixed the 'off by one' bug spotted by David.

      Br.
        Matti Vaittinen

Multicast groups are stored in global buffer. Check for needed buffer size
incorrectly compares buffer size to first id for family. This means that
for families with more than one mcast id one may allocate too small buffer
and end up writing rest of the groups to some unallocated memory. Fix the
buffer size check to compare allocated space to last mcast id for the
family.

Tested on ARM using kernel 3.14

Signed-off-by: Matti Vaittinen <redacted>

I inadvertantly applied your original patch, so I'll just fix
the off-by-one error with a seperate commit.

Sorry for the confusion and thanks for fixing this.