Revision 3b2e2904deb314cc77a2192f506f2fd44e3d10d0 authored by Nikolay Aleksandrov on 11 April 2019, 10:56:39 UTC, committed by David S. Miller on 17 April 2019, 03:30:40 UTC
When the commit below was introduced it changed two visible things: - the skb was no longer passed through the protocol handlers with the original device - the skb was passed up the stack with skb->dev = bridge The first change broke af_packet sockets on bridge ports. For example we use them for hostapd which listens for ETH_P_PAE packets on the ports. We discussed two possible fixes: - create a clone and pass it through NF_HOOK(), act on the original skb based on the result - somehow signal to the caller from the okfn() that it was called, meaning the skb is ok to be passed, which this patch is trying to implement via returning 1 from the bridge link-local okfn() Note that we rely on the fact that NF_QUEUE/STOLEN would return 0 and drop/error would return < 0 thus the okfn() is called only when the return was 1, so we signal to the caller that it was called by preserving the return value from nf_hook(). Fixes: 8626c56c8279 ("bridge: fix potential use-after-free when hook returns QUEUE or STOLEN verdict") Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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File | Mode | Size |
---|---|---|
Kconfig | -rw-r--r-- | 2.6 KB |
Makefile | -rw-r--r-- | 583 bytes |
Makefile.boot | -rw-r--r-- | 183 bytes |
core.h | -rw-r--r-- | 91 bytes |
dcscb.c | -rw-r--r-- | 4.7 KB |
dcscb_setup.S | -rw-r--r-- | 1016 bytes |
platsmp.c | -rw-r--r-- | 2.4 KB |
spc.c | -rw-r--r-- | 13.8 KB |
spc.h | -rw-r--r-- | 850 bytes |
tc2_pm.c | -rw-r--r-- | 7.3 KB |
v2m-mps2.c | -rw-r--r-- | 491 bytes |
v2m.c | -rw-r--r-- | 409 bytes |
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