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| author | Eyal Birger <eyal.birger@gmail.com> | 2022-10-11 11:01:37 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2022-10-12 10:45:51 +0200 |
| commit | d83f7040e18489265b4b121f33f99b02e52dabda (patch) | |
| tree | 4e53df84cf31b2141e84f3342c3acd02522c4371 /net/core/lwtunnel.c | |
| parent | 3a5913183aa1b14148c723bda030e6102ad73008 (diff) | |
| download | linux-d83f7040e18489265b4b121f33f99b02e52dabda.tar.bz2 | |
xfrm: lwtunnel: squelch kernel warning in case XFRM encap type is not available
Ido reported that a kernel warning [1] can be triggered from
user space when the kernel is compiled with CONFIG_MODULES=y and
CONFIG_XFRM=n when adding an xfrm encap type route, e.g:
$ ip route add 198.51.100.0/24 dev dummy1 encap xfrm if_id 1
Error: lwt encapsulation type not supported.
The reason for the warning is that the LWT infrastructure has an
autoloading feature which is meant only for encap types that don't
use a net device, which is not the case in xfrm encap.
Mute this warning for xfrm encap as there's no encap module to autoload
in this case.
[1]
WARNING: CPU: 3 PID: 2746262 at net/core/lwtunnel.c:57 lwtunnel_valid_encap_type+0x4f/0x120
[...]
Call Trace:
<TASK>
rtm_to_fib_config+0x211/0x350
inet_rtm_newroute+0x3a/0xa0
rtnetlink_rcv_msg+0x154/0x3c0
netlink_rcv_skb+0x49/0xf0
netlink_unicast+0x22f/0x350
netlink_sendmsg+0x208/0x440
____sys_sendmsg+0x21f/0x250
___sys_sendmsg+0x83/0xd0
__sys_sendmsg+0x54/0xa0
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Reported-by: Ido Schimmel <idosch@idosch.org>
Fixes: 2c2493b9da91 ("xfrm: lwtunnel: add lwtunnel support for xfrm interfaces in collect_md mode")
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/core/lwtunnel.c')
| -rw-r--r-- | net/core/lwtunnel.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c index 6fac2f0ef074..711cd3b4347a 100644 --- a/net/core/lwtunnel.c +++ b/net/core/lwtunnel.c @@ -48,9 +48,11 @@ static const char *lwtunnel_encap_str(enum lwtunnel_encap_types encap_type) return "RPL"; case LWTUNNEL_ENCAP_IOAM6: return "IOAM6"; + case LWTUNNEL_ENCAP_XFRM: + /* module autoload not supported for encap type */ + return NULL; case LWTUNNEL_ENCAP_IP6: case LWTUNNEL_ENCAP_IP: - case LWTUNNEL_ENCAP_XFRM: case LWTUNNEL_ENCAP_NONE: case __LWTUNNEL_ENCAP_MAX: /* should not have got here */ |