1) The flow cache is limited by the flow cache limit which
depends on the number of cpus and the xfrm garbage collector
threshold which is independent of the number of cpus. This
leads to the fact that on systems with more than 16 cpus
we hit the xfrm garbage collector limit and refuse new
allocations, so new flows are dropped. On systems with 16
or less cpus, we hit the flowcache limit. In this case, we
shrink the flow cache instead of refusing new flows.
We increase the xfrm garbage collector threshold to INT_MAX
to get the same behaviour, independent of the number of cpus.
2) Fix some unaligned accesses on sparc systems.
From Sowmini Varadhan.
3) Fix some header checks in _decode_session4. We may call
pskb_may_pull with a negative value converted to unsigened
int from pskb_may_pull. This can lead to incorrect policy
lookups. We fix this by a check of the data pointer position
before we call pskb_may_pull.
4) Reload skb header pointers after calling pskb_may_pull
in _decode_session4 as this may change the pointers into
the packet.
5) Add a missing statistic counter on inner mode errors.
Please pull or let me know if there are problems.
Thanks!
The following changes since commit 8a4683a5e06efda7e1f327213678d4dcafc0d894:
net: help compiler generate better code in eth_get_headlen (2015-09-28
22:51:15 -0700)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git master
for you to fetch changes up to cb866e3298cd7412503fc7e2c265753c853fab9d:
xfrm: Increment statistic counter on inner mode error (2015-10-23 07:52:58
+0200)
----------------------------------------------------------------
Sowmini Varadhan (1):
xfrm: Fix unaligned access to stats in copy_to_user_state()
Steffen Klassert (4):
xfrm: Let the flowcache handle its size by default.
xfrm4: Fix header checks in _decode_session4.
xfrm4: Reload skb header pointers after calling pskb_may_pull.
xfrm: Increment statistic counter on inner mode error
Documentation/networking/ip-sysctl.txt | 6 ++--
net/ipv4/xfrm4_policy.c | 50 +++++++++++++++++++++++++---------
net/ipv6/xfrm6_policy.c | 2 +-
net/xfrm/xfrm_input.c | 4 ++-
net/xfrm/xfrm_user.c | 5 +++-
5 files changed, 49 insertions(+), 18 deletions(-)
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