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(parent: 7a735af) | patch
ipv4: Do not use dead fib_info entries.
authorDavid S. Miller <davem@davemloft.net>
Fri, 11 May 2012 02:16:32 +0000 (22:16 -0400)
committerBen Hutchings <ben@decadent.org.uk>
Sun, 10 Jun 2012 13:42:02 +0000 (14:42 +0100)
commit9f6cf3abdb1e954db86f963569590444642495ff
treeccf07daac4181ba0874b03a810ab13c72298813ctree | snapshot
parent7a735af2d50190b6c612509c6dcad1b5aa0be828commit | diff
ipv4: Do not use dead fib_info entries.

[ Upstream commit dccd9ecc374462e5d6a5b8f8110415a86c2213d8 ]

Due to RCU lookups and RCU based release, fib_info objects can
be found during lookup which have fi->fib_dead set.

We must ignore these entries, otherwise we risk dereferencing
the parts of the entry which are being torn down.

Reported-by: Yevgen Pronenko <yevgen.pronenko@sonymobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
net/ipv4/fib_trie.c diff | blob | history
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