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| author | Tycho Andersen <tycho.andersen@canonical.com> | 2016-02-05 09:20:52 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-11 09:53:19 -0500 |
| commit | 4a92602aa1cd5bbaeedbd9536ff992f7d26fe9d1 (patch) | |
| tree | 0c1fc8a9c5f393a08cd34c6c02544643eaf0681d /include/uapi | |
| parent | 4456ed04ea44b800d691b18c14a68ec9894d2aca (diff) | |
| download | linux-4a92602aa1cd5bbaeedbd9536ff992f7d26fe9d1.tar.gz linux-4a92602aa1cd5bbaeedbd9536ff992f7d26fe9d1.tar.bz2 linux-4a92602aa1cd5bbaeedbd9536ff992f7d26fe9d1.zip | |
openvswitch: allow management from inside user namespaces
Operations with the GENL_ADMIN_PERM flag fail permissions checks because
this flag means we call netlink_capable, which uses the init user ns.
Instead, let's introduce a new flag, GENL_UNS_ADMIN_PERM for operations
which should be allowed inside a user namespace.
The motivation for this is to be able to run openvswitch in unprivileged
containers. I've tested this and it seems to work, but I really have no
idea about the security consequences of this patch, so thoughts would be
much appreciated.
v2: use the GENL_UNS_ADMIN_PERM flag instead of a check in each function
v3: use separate ifs for UNS_ADMIN_PERM and ADMIN_PERM, instead of one
massive one
Reported-by: James Page <james.page@canonical.com>
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
CC: Eric Biederman <ebiederm@xmission.com>
CC: Pravin Shelar <pshelar@ovn.org>
CC: Justin Pettit <jpettit@nicira.com>
CC: "David S. Miller" <davem@davemloft.net>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/genetlink.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/genetlink.h b/include/uapi/linux/genetlink.h index c3363ba1ae05..5512c90af7e3 100644 --- a/include/uapi/linux/genetlink.h +++ b/include/uapi/linux/genetlink.h @@ -21,6 +21,7 @@ struct genlmsghdr { #define GENL_CMD_CAP_DO 0x02 #define GENL_CMD_CAP_DUMP 0x04 #define GENL_CMD_CAP_HASPOL 0x08 +#define GENL_UNS_ADMIN_PERM 0x10 /* * List of reserved static generic netlink identifiers: |