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| author | Paolo Abeni <pabeni@redhat.com> | 2017-07-25 17:57:47 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-25 19:00:58 +0200 |
| commit | dce4551cb2adb1ac9a30f8ab5299d614392b3cff (patch) | |
| tree | 37ebe575b7c880828a938de778803ddf3f943d7d /crypto/algboss.c | |
| parent | net: dsa: Initialize ds->cpu_port_mask earlier (diff) | |
| download | linux-dce4551cb2adb1ac9a30f8ab5299d614392b3cff.tar.xz linux-dce4551cb2adb1ac9a30f8ab5299d614392b3cff.zip | |
udp: preserve head state for IP_CMSG_PASSSEC
Paul Moore reported a SELinux/IP_PASSSEC regression
caused by missing skb->sp at recvmsg() time. We need to
preserve the skb head state to process the IP_CMSG_PASSSEC
cmsg.
With this commit we avoid releasing the skb head state in the
BH even if a secpath is attached to the current skb, and stores
the skb status (with/without head states) in the scratch area,
so that we can access it at skb deallocation time, without
incurring in cache-miss penalties.
This also avoids misusing the skb CB for ipv6 packets,
as introduced by the commit 0ddf3fb2c43d ("udp: preserve
skb->dst if required for IP options processing").
Clean a bit the scratch area helpers implementation, to
reduce the code differences between 32 and 64 bits build.
Reported-by: Paul Moore <paul@paul-moore.com>
Fixes: 0a463c78d25b ("udp: avoid a cache miss on dequeue")
Fixes: 0ddf3fb2c43d ("udp: preserve skb->dst if required for IP options processing")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Tested-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'crypto/algboss.c')
0 files changed, 0 insertions, 0 deletions