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| author |  Guillaume Nault <gnault@redhat.com>
| 2022-10-13 16:37:47 +0200 |
|---|---|---|
| committer |  Pablo Neira Ayuso <pablo@netfilter.org>
| 2022-10-19 08:46:48 +0200 |
| commit | 1fcc064b305a1aadeff0d4bff961094d27660acd (patch) | |
| tree | 8dcb7515e4d412cc7787785dcdcb1339f0f2d7c7 /net/ipv4/igmp.c | |
| parent | ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed (diff) | |
| download | linux-1fcc064b305a1aadeff0d4bff961094d27660acd.tar.gz linux-1fcc064b305a1aadeff0d4bff961094d27660acd.tar.bz2 linux-1fcc064b305a1aadeff0d4bff961094d27660acd.zip | |
netfilter: rpfilter/fib: Set ->flowic_uid correctly for user namespaces.
Currently netfilter's rpfilter and fib modules implicitely initialise
->flowic_uid with 0. This is normally the root UID. However, this isn't
the case in user namespaces, where user ID 0 is mapped to a different
kernel UID. By initialising ->flowic_uid with sock_net_uid(), we get
the root UID of the user namespace, thus keeping the same behaviour
whether or not we're running in a user namepspace.
Note, this is similar to commit 8bcfd0925ef1 ("ipv4: add missing
initialization for flowi4_uid"), which fixed the rp_filter sysctl.
Fixes: 622ec2c9d524 ("net: core: add UID to flows, rules, and routes")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv4/igmp.c')
0 files changed, 0 insertions, 0 deletions