On Fri, Jun 26, 2015 at 01:44:04PM +0300, Konstantin Khlebnikov wrote:

I've found race in v3.18 in __netlink_lookup: rhashtable_hashfn
computes hash using one table and following rhashtable_lookup_compare
dereferences ht->tbl once again and could see different table.

patch follows...

Sounds like this is it.  Thanks for digging into this!
-- 
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt