Norihiko Hama
bc4d82ee40
ANDROID: KMI workaround for CONFIG_NETFILTER_FAMILY_BRIDGE
...
Enabling CONFIG_NETFILTER_FAMILY_BRIDGE causes the new element,
hooks_bridge[] to be added to netns_nf. Since the KMI is frozen
this could not be added.
The only instantiation of struct netns_nf is as an embedded field
of struct net. So instead of adding the field to struct netns_nf,
a new "struct ext_net" is added that contains struct net and
the new hooks_bridge[] field. An accessor function,
get_nf_hooks_bridge() is added to get a pointer to the new
field.
There is a global init_net of type struct net which must be special
cased since it is not a member of a struct ext_net. All other
instances of struct net are allocated via net_alloc() which now
allocates a struct ext_net.
Since CONFIG_NETFILTER_FAMILY_BRIDGE is a hidden config that is
needed for vendor modules, it is enabled via init/Kconfig.gki.
Bug: 316040984
Fixes: 0145780bfc78 ("fix KASAN-related kernel crash by KMI W/A for NETFILTER_FAMILY_BRIDGE")
Change-Id: I2c7384e3df9b88f12464dc0138986fed12ca626a
Signed-off-by: Norihiko Hama <Norihiko.Hama@alpsalpine.com >
2024-01-09 23:37:43 +00:00
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