* [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
@ 2026-01-06 14:45 Eric Dumazet
2026-01-06 17:56 ` Jakub Kicinski
0 siblings, 1 reply; 11+ messages in thread
From: Eric Dumazet @ 2026-01-06 14:45 UTC (permalink / raw)
To: David S . Miller, Jakub Kicinski, Paolo Abeni
Cc: Simon Horman, Florian Westphal, netdev, eric.dumazet,
Eric Dumazet, syzbot+6023ea32e206eef7920a, Mazin Al Haddad
I added skb_vlan_inet_prepare() helper in the cited commit, hinting
that we would need to use it more broadly.
syzbot confirmed this was the case in ip6_gre.
uninit-value in ip6table_mangle_hook+0x97d/0x9c0 net/ipv6/netfilter/ip6table_mangle.c:72
ip6t_mangle_out net/ipv6/netfilter/ip6table_mangle.c:56 [inline]
ip6table_mangle_hook+0x97d/0x9c0 net/ipv6/netfilter/ip6table_mangle.c:72
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
__ip6_local_out+0x5ac/0x640 net/ipv6/output_core.c:143
ip6_local_out+0x4c/0x210 net/ipv6/output_core.c:153
ip6tunnel_xmit+0x129/0x460 include/net/ip6_tunnel.h:161
ip6_tnl_xmit+0x341a/0x3860 net/ipv6/ip6_tunnel.c:1281
Uninit was stored to memory at:
ip6_tnl_xmit+0x34f7/0x3860 net/ipv6/ip6_tunnel.c:1277
__gre6_xmit+0x14b9/0x1550 net/ipv6/ip6_gre.c:815
ip6gre_xmit_ipv4 net/ipv6/ip6_gre.c:839 [inline]
ip6gre_tunnel_xmit+0x18f7/0x2030 net/ipv6/ip6_gre.c:922
Uninit was created at:
slab_post_alloc_hook mm/slub.c:4091 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
__do_kmalloc_node mm/slub.c:4263 [inline]
__kmalloc_node_track_caller_noprof+0x6c7/0xf90 mm/slub.c:4283
kmalloc_reserve+0x23e/0x4a0 net/core/skbuff.c:609
pskb_expand_head+0x226/0x1a60 net/core/skbuff.c:2275
skb_realloc_headroom+0x140/0x2b0 net/core/skbuff.c:2355
ip6_tnl_xmit+0x2106/0x3860 net/ipv6/ip6_tunnel.c:1227
__gre6_xmit+0x14b9/0x1550 net/ipv6/ip6_gre.c:815
ip6gre_xmit_ipv4 net/ipv6/ip6_gre.c:839 [inline]
ip6gre_tunnel_xmit+0x18f7/0x2030 net/ipv6/ip6_gre.c:922
Fixes: d8a6213d70ac ("geneve: fix header validation in geneve[6]_xmit_skb")
Reported-by: syzbot+6023ea32e206eef7920a@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=6023ea32e206eef7920a
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Mazin Al Haddad <mazin@getstate.dev>
---
v2: invert the conditions (Jakub)
v1: https://lore.kernel.org/netdev/CANn89iK6uqJ8YEvzcz-EsS1piyay7hTdbC=S_z-Feho9YBeN_g@mail.gmail.com/T/#t
net/ipv6/ip6_gre.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index d19d86ed43766bbc8ec052113be02ab231a5272c..ca1571c63f40f90dd4fd53b526b6c481087f8320 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -881,7 +881,7 @@ static netdev_tx_t ip6gre_tunnel_xmit(struct sk_buff *skb,
__be16 payload_protocol;
int ret;
- if (!pskb_inet_may_pull(skb))
+ if (skb_vlan_inet_prepare(skb, false))
goto tx_err;
if (!ip6_tnl_xmit_ctl(t, &t->parms.laddr, &t->parms.raddr))
@@ -929,7 +929,7 @@ static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb,
__u32 mtu;
int nhoff;
- if (!pskb_inet_may_pull(skb))
+ if (skb_vlan_inet_prepare(skb, false))
goto tx_err;
if (!ip6_tnl_xmit_ctl(t, &t->parms.laddr, &t->parms.raddr))
--
2.52.0.351.gbe84eed79e-goog
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 14:45 [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull() Eric Dumazet
@ 2026-01-06 17:56 ` Jakub Kicinski
2026-01-06 19:33 ` Eric Dumazet
0 siblings, 1 reply; 11+ messages in thread
From: Jakub Kicinski @ 2026-01-06 17:56 UTC (permalink / raw)
To: Eric Dumazet
Cc: David S . Miller, Paolo Abeni, Simon Horman, Florian Westphal,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Tue, 6 Jan 2026 14:45:29 +0000 Eric Dumazet wrote:
> v2: invert the conditions (Jakub)
Thanks! Much better now, but still failing
tools/testing/selftests/net/gre_gso.sh
TAP version 13
1..1
# timeout set to 3600
# selftests: net: gre_gso.sh
# 2.16 [+2.16] TEST: GREv6/v4 - copy file w/ TSO [ OK ]
# 3.16 [+1.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
# 3.17 [+0.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
# 3.17 [+0.00] TEST: GREv6/v4 - copy file w/ GSO [FAIL]
# 3.18 [+0.01] 2026/01/06 10:32:57 socat[20533] W exiting on signal 15
# 3.19 [+0.00] TEST: GREv6/v6 - copy file w/ TSO [ OK ]
# 4.19 [+1.00] 2026/01/06 10:32:59 socat[20559] W exiting on signal 15
# 4.19 [+0.01] TEST: GREv6/v6 - copy file w/ GSO [FAIL]
# 4.20 [+0.01] 2026/01/06 10:32:59 socat[20549] W exiting on signal 15
# 4.22 [+0.02] 2026/01/06 10:32:59 socat[20560] W exiting on signal 15
# 4.23 [+0.01]
# 4.23 [+0.00] Tests passed: 2
# 4.23 [+0.00] Tests failed: 2
not ok 1 selftests: net: gre_gso.sh # exit=1
https://netdev-ctrl.bots.linux.dev/logs/vmksft/net/results/461862/65-gre-gso-sh/stdout
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 17:56 ` Jakub Kicinski
@ 2026-01-06 19:33 ` Eric Dumazet
2026-01-06 20:31 ` Jakub Kicinski
2026-01-07 8:46 ` Florian Westphal
0 siblings, 2 replies; 11+ messages in thread
From: Eric Dumazet @ 2026-01-06 19:33 UTC (permalink / raw)
To: Jakub Kicinski
Cc: David S . Miller, Paolo Abeni, Simon Horman, Florian Westphal,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Tue, Jan 6, 2026 at 6:56 PM Jakub Kicinski <kuba@kernel.org> wrote:
>
> On Tue, 6 Jan 2026 14:45:29 +0000 Eric Dumazet wrote:
> > v2: invert the conditions (Jakub)
>
> Thanks! Much better now, but still failing
> tools/testing/selftests/net/gre_gso.sh
>
> TAP version 13
> 1..1
> # timeout set to 3600
> # selftests: net: gre_gso.sh
> # 2.16 [+2.16] TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> # 3.16 [+1.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> # 3.17 [+0.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> # 3.17 [+0.00] TEST: GREv6/v4 - copy file w/ GSO [FAIL]
> # 3.18 [+0.01] 2026/01/06 10:32:57 socat[20533] W exiting on signal 15
> # 3.19 [+0.00] TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> # 4.19 [+1.00] 2026/01/06 10:32:59 socat[20559] W exiting on signal 15
> # 4.19 [+0.01] TEST: GREv6/v6 - copy file w/ GSO [FAIL]
> # 4.20 [+0.01] 2026/01/06 10:32:59 socat[20549] W exiting on signal 15
> # 4.22 [+0.02] 2026/01/06 10:32:59 socat[20560] W exiting on signal 15
> # 4.23 [+0.01]
> # 4.23 [+0.00] Tests passed: 2
> # 4.23 [+0.00] Tests failed: 2
> not ok 1 selftests: net: gre_gso.sh # exit=1
>
> https://netdev-ctrl.bots.linux.dev/logs/vmksft/net/results/461862/65-gre-gso-sh/stdout
For some reason I am unable to run this test from a virtme-ng instance.
I guess I wlll not make a new version of this patch, maybe Florian can
take over.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 19:33 ` Eric Dumazet
@ 2026-01-06 20:31 ` Jakub Kicinski
2026-01-06 21:25 ` Eric Dumazet
2026-01-07 8:46 ` Florian Westphal
1 sibling, 1 reply; 11+ messages in thread
From: Jakub Kicinski @ 2026-01-06 20:31 UTC (permalink / raw)
To: Eric Dumazet
Cc: David S . Miller, Paolo Abeni, Simon Horman, Florian Westphal,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Tue, 6 Jan 2026 20:33:40 +0100 Eric Dumazet wrote:
> For some reason I am unable to run this test from a virtme-ng instance.
>
> I guess I wlll not make a new version of this patch, maybe Florian can
> take over.
Hm, no complications seen here:
$ vng -r --user root
..
prompt# cd tools/testing/selftests/net/
prompt# ./gre_gso.sh
TEST: GREv6/v4 - copy file w/ TSO [ OK ]
TEST: GREv6/v4 - copy file w/ GSO [ OK ]
2026/01/06 15:30:35 socat[1704] W exiting on signal 15
TEST: GREv6/v6 - copy file w/ TSO [ OK ]
TEST: GREv6/v6 - copy file w/ GSO [ OK ]
2026/01/06 15:30:35 socat[1721] W exiting on signal 15
Tests passed: 4
Tests failed: 0
Happy to give you access to the netdev machine to experiment there
if that helps, just send me an SSH key.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 20:31 ` Jakub Kicinski
@ 2026-01-06 21:25 ` Eric Dumazet
2026-01-06 21:33 ` Eric Dumazet
0 siblings, 1 reply; 11+ messages in thread
From: Eric Dumazet @ 2026-01-06 21:25 UTC (permalink / raw)
To: Jakub Kicinski
Cc: David S . Miller, Paolo Abeni, Simon Horman, Florian Westphal,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Tue, Jan 6, 2026 at 9:31 PM Jakub Kicinski <kuba@kernel.org> wrote:
>
> On Tue, 6 Jan 2026 20:33:40 +0100 Eric Dumazet wrote:
> > For some reason I am unable to run this test from a virtme-ng instance.
> >
> > I guess I wlll not make a new version of this patch, maybe Florian can
> > take over.
>
> Hm, no complications seen here:
>
> $ vng -r --user root
> ..
> prompt# cd tools/testing/selftests/net/
> prompt# ./gre_gso.sh
>
> TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> TEST: GREv6/v4 - copy file w/ GSO [ OK ]
> 2026/01/06 15:30:35 socat[1704] W exiting on signal 15
> TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> TEST: GREv6/v6 - copy file w/ GSO [ OK ]
> 2026/01/06 15:30:35 socat[1721] W exiting on signal 15
>
> Tests passed: 4
> Tests failed: 0
>
>
> Happy to give you access to the netdev machine to experiment there
> if that helps, just send me an SSH key.
My vng launch script had the -v option ( --verbose, -v Increase
console output verbosity), and this was causing issues.
Anyway, using my v2 patch on top of current net-tree
(238e03d0466239410) seems fine to me, no error at all,
not sure why your bot is unhappy.
Could multiple patches have been tested together, one having a side effect ?
[hi on] edumazet@edumazet1:~/git/net-next$ vng -r --user root --cpus
4 --memory 4G
/usr/lib/tmpfiles.d/legacy.conf:14: Duplicate line for path
"/run/lock", ignoring.
_ _
__ _(_)_ __| |_ _ __ ___ ___ _ __ __ _
\ \ / / | __| __| _ _ \ / _ \_____| _ \ / _ |
\ V /| | | | |_| | | | | | __/_____| | | | (_| |
\_/ |_|_| \__|_| |_| |_|\___| |_| |_|\__ |
|___/
kernel version: 6.16.12-1rodete2-amd64 x86_64
(CTRL+d to exit)
Illegal instruction shell-history-configtool configure-interactively
root@virtme-ng:/usr/local/google/home/edumazet/git/net-next# cd
tools/testing/selftests/net/
root@virtme-ng:/usr/local/google/home/edumazet/git/net-next/tools/testing/selftests/net#
./gre_gso.sh
TEST: GREv6/v4 - copy file w/ TSO [ OK ]
TEST: GREv6/v4 - copy file w/ GSO [ OK ]
2026/01/06 21:25:27 socat[1214] W exiting on signal 15
TEST: GREv6/v6 - copy file w/ TSO [ OK ]
TEST: GREv6/v6 - copy file w/ GSO [ OK ]
2026/01/06 21:25:27 socat[1229] W exiting on signal 15
Tests passed: 4
Tests failed: 0
root@virtme-ng:/usr/local/google/home/edumazet/git/net-next/tools/testing/selftests/net#
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 21:25 ` Eric Dumazet
@ 2026-01-06 21:33 ` Eric Dumazet
2026-01-06 22:28 ` Jakub Kicinski
0 siblings, 1 reply; 11+ messages in thread
From: Eric Dumazet @ 2026-01-06 21:33 UTC (permalink / raw)
To: Jakub Kicinski
Cc: David S . Miller, Paolo Abeni, Simon Horman, Florian Westphal,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Tue, Jan 6, 2026 at 10:25 PM Eric Dumazet <edumazet@google.com> wrote:
>
> On Tue, Jan 6, 2026 at 9:31 PM Jakub Kicinski <kuba@kernel.org> wrote:
> >
> > On Tue, 6 Jan 2026 20:33:40 +0100 Eric Dumazet wrote:
> > > For some reason I am unable to run this test from a virtme-ng instance.
> > >
> > > I guess I wlll not make a new version of this patch, maybe Florian can
> > > take over.
> >
> > Hm, no complications seen here:
> >
> > $ vng -r --user root
> > ..
> > prompt# cd tools/testing/selftests/net/
> > prompt# ./gre_gso.sh
> >
> > TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> > TEST: GREv6/v4 - copy file w/ GSO [ OK ]
> > 2026/01/06 15:30:35 socat[1704] W exiting on signal 15
> > TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> > TEST: GREv6/v6 - copy file w/ GSO [ OK ]
> > 2026/01/06 15:30:35 socat[1721] W exiting on signal 15
> >
> > Tests passed: 4
> > Tests failed: 0
> >
> >
> > Happy to give you access to the netdev machine to experiment there
> > if that helps, just send me an SSH key.
>
> My vng launch script had the -v option ( --verbose, -v Increase
> console output verbosity), and this was causing issues.
>
>
> Anyway, using my v2 patch on top of current net-tree
> (238e03d0466239410) seems fine to me, no error at all,
> not sure why your bot is unhappy.
>
> Could multiple patches have been tested together, one having a side effect ?
>
> [hi on] edumazet@edumazet1:~/git/net-next$ vng -r --user root --cpus
> 4 --memory 4G
> /usr/lib/tmpfiles.d/legacy.conf:14: Duplicate line for path
> "/run/lock", ignoring.
> _ _
> __ _(_)_ __| |_ _ __ ___ ___ _ __ __ _
> \ \ / / | __| __| _ _ \ / _ \_____| _ \ / _ |
> \ V /| | | | |_| | | | | | __/_____| | | | (_| |
> \_/ |_|_| \__|_| |_| |_|\___| |_| |_|\__ |
> |___/
> kernel version: 6.16.12-1rodete2-amd64 x86_64
> (CTRL+d to exit)
>
> Illegal instruction shell-history-configtool configure-interactively
> root@virtme-ng:/usr/local/google/home/edumazet/git/net-next# cd
> tools/testing/selftests/net/
> root@virtme-ng:/usr/local/google/home/edumazet/git/net-next/tools/testing/selftests/net#
> ./gre_gso.sh
> TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> TEST: GREv6/v4 - copy file w/ GSO [ OK ]
> 2026/01/06 21:25:27 socat[1214] W exiting on signal 15
> TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> TEST: GREv6/v6 - copy file w/ GSO [ OK ]
> 2026/01/06 21:25:27 socat[1229] W exiting on signal 15
>
> Tests passed: 4
> Tests failed: 0
> root@virtme-ng:/usr/local/google/home/edumazet/git/net-next/tools/testing/selftests/net#
Ah of course my script had '-r arch/x86/boot/bzImage'
I will test more tomorrow.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 21:33 ` Eric Dumazet
@ 2026-01-06 22:28 ` Jakub Kicinski
0 siblings, 0 replies; 11+ messages in thread
From: Jakub Kicinski @ 2026-01-06 22:28 UTC (permalink / raw)
To: Eric Dumazet
Cc: David S . Miller, Paolo Abeni, Simon Horman, Florian Westphal,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Tue, 6 Jan 2026 22:33:05 +0100 Eric Dumazet wrote:
> > [hi on] edumazet@edumazet1:~/git/net-next$ vng -r --user root --cpus
> > 4 --memory 4G
> > /usr/lib/tmpfiles.d/legacy.conf:14: Duplicate line for path
> > "/run/lock", ignoring.
> > _ _
> > __ _(_)_ __| |_ _ __ ___ ___ _ __ __ _
> > \ \ / / | __| __| _ _ \ / _ \_____| _ \ / _ |
> > \ V /| | | | |_| | | | | | __/_____| | | | (_| |
> > \_/ |_|_| \__|_| |_| |_|\___| |_| |_|\__ |
> > |___/
> > kernel version: 6.16.12-1rodete2-amd64 x86_64
> > (CTRL+d to exit)
> >
> > Illegal instruction shell-history-configtool configure-interactively
> > root@virtme-ng:/usr/local/google/home/edumazet/git/net-next# cd
> > tools/testing/selftests/net/
> > root@virtme-ng:/usr/local/google/home/edumazet/git/net-next/tools/testing/selftests/net#
> > ./gre_gso.sh
> > TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> > TEST: GREv6/v4 - copy file w/ GSO [ OK ]
> > 2026/01/06 21:25:27 socat[1214] W exiting on signal 15
> > TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> > TEST: GREv6/v6 - copy file w/ GSO [ OK ]
> > 2026/01/06 21:25:27 socat[1229] W exiting on signal 15
> >
> > Tests passed: 4
> > Tests failed: 0
> > root@virtme-ng:/usr/local/google/home/edumazet/git/net-next/tools/testing/selftests/net#
>
> Ah of course my script had '-r arch/x86/boot/bzImage'
Maybe your machine / TCP tunings are super fast. I think we have some
packet loss here which slows things down, maybe we run into the timeout
of 1 sec with GSO and you don't.
I did this to the (GSO side of the) test:
diff --git a/tools/testing/selftests/net/gre_gso.sh b/tools/testing/selftests/net/gre_gso.sh
index 5100d90f92d2..b9a223b584f6 100755
--- a/tools/testing/selftests/net/gre_gso.sh
+++ b/tools/testing/selftests/net/gre_gso.sh
@@ -125,9 +125,16 @@ gre_gst_test_checks()
ethtool -K veth0 tso off
- cat $TMPFILE | timeout 1 socat -u STDIN TCP:$addr:$port
- log_test $? 0 "$name - copy file w/ GSO"
-
+ $NS_EXEC nstat >>/dev/null
+ nstat >>/dev/null
+ cat $TMPFILE | \time timeout 1 socat -u STDIN TCP:$addr:$port
+ R=$?
+ echo "== Sender"
+ nstat
+ echo "== Receiver"
+ $NS_EXEC nstat
+ log_test $R 0 "$name - copy file w/ GSO"
+
ethtool -K veth0 tso on
kill $PID
Without the fix under discussion I get:
# ./gre_gso.sh
TEST: GREv6/v4 - copy file w/ TSO [ OK ]
0.00user 0.12system 0:00.13elapsed 92%CPU (0avgtext+0avgdata 3744maxresident)k
0inputs+0outputs (0major+406minor)pagefaults 0swaps
== Sender
#kernel
IpInReceives 255 0.0
IpInDelivers 255 0.0
IpOutRequests 259 0.0
IpOutTransmits 259 0.0
TcpActiveOpens 1 0.0
TcpInSegs 255 0.0
TcpOutSegs 1539 0.0
Ip6InReceives 255 0.0
Ip6InDelivers 255 0.0
Ip6InOctets 26528 0.0
Ip6OutOctets 2124096 0.0
Ip6InNoECTPkts 255 0.0
Ip6OutTransmits 259 0.0
TcpExtTCPPureAcks 252 0.0
TcpExtTCPBacklogCoalesce 1 0.0
TcpExtTCPOrigDataSent 1536 0.0
TcpExtTCPDelivered 1537 0.0
IpExtInOctets 13268 0.0
IpExtOutOctets 2110628 0.0
IpExtInNoECTPkts 255 0.0
== Receiver
#kernel
IpInReceives 7 0.0
IpInDelivers 7 0.0
TcpPassiveOpens 2 0.0
TcpInSegs 7 0.0
Ip6InReceives 1287 0.0
Ip6InDelivers 1287 0.0
Ip6InMcastPkts 1 0.0
Ip6InOctets 4328152 0.0
Ip6InMcastOctets 72 0.0
Ip6InNoECTPkts 2564 0.0
Icmp6InNeighborSolicits 1 0.0
Icmp6OutNeighborAdvertisements 1 0.0
Icmp6InType135 1 0.0
Icmp6OutType136 1 0.0
TcpExtTW 2 0.0
TcpExtTCPRcvCoalesce 22 0.0
IpExtInOctets 4194668 0.0
IpExtInNoECTPkts 2564 0.0
TEST: GREv6/v4 - copy file w/ GSO [ OK ]
2026/01/06 17:23:10 socat[787] W exiting on signal 15
TEST: GREv6/v6 - copy file w/ TSO [ OK ]
0.00user 0.12system 0:00.14elapsed 85%CPU (0avgtext+0avgdata 3668maxresident)k
0inputs+0outputs (0major+405minor)pagefaults 0swaps
== Sender
#kernel
TcpActiveOpens 1 0.0
TcpInSegs 261 0.0
TcpOutSegs 1539 0.0
Ip6InReceives 522 0.0
Ip6InDelivers 522 0.0
Ip6OutRequests 263 0.0
Ip6InOctets 51172 0.0
Ip6OutOctets 4245868 0.0
Ip6InNoECTPkts 522 0.0
Ip6OutTransmits 526 0.0
TcpExtTCPPureAcks 257 0.0
TcpExtTCPLossProbes 1 0.0
TcpExtTCPBacklogCoalesce 2 0.0
TcpExtTCPOrigDataSent 1537 0.0
TcpExtTCPDelivered 1538 0.0
== Receiver
#kernel
IpInReceives 7 0.0
IpInDelivers 7 0.0
TcpPassiveOpens 4 0.0
TcpInSegs 11 0.0
Ip6InReceives 2571 0.0
Ip6InDelivers 2571 0.0
Ip6InMcastPkts 1 0.0
Ip6InOctets 12875768 0.0
Ip6InMcastOctets 72 0.0
Ip6InNoECTPkts 7670 0.0
Icmp6InNeighborSolicits 1 0.0
Icmp6OutNeighborAdvertisements 1 0.0
Icmp6InType135 1 0.0
Icmp6OutType136 1 0.0
TcpExtTW 4 0.0
TcpExtTCPRcvCoalesce 42 0.0
IpExtInOctets 4194668 0.0
IpExtInNoECTPkts 2564 0.0
TEST: GREv6/v6 - copy file w/ GSO [ OK ]
2026/01/06 17:23:10 socat[808] W exiting on signal 15
Tests passed: 4
Tests failed: 0
With the change I see retransmits:
# ./gre_gso.sh
TEST: GREv6/v4 - copy file w/ TSO [ OK ]
2026/01/06 17:25:21 socat[805] W exiting on signal 15
Command exited with non-zero status 124
0.00user 0.03system 0:01.02elapsed 3%CPU (0avgtext+0avgdata 3792maxresident)k
0inputs+0outputs (2major+408minor)pagefaults 0swaps
== Sender
#kernel
IpInReceives 103 0.0
IpInDelivers 103 0.0
IpOutRequests 145 0.0
IpOutTransmits 145 0.0
TcpActiveOpens 1 0.0
TcpInSegs 103 0.0
TcpOutSegs 123 0.0
TcpRetransSegs 52 0.0
Ip6InReceives 103 0.0
Ip6InDelivers 103 0.0
Ip6InOctets 11176 0.0
Ip6OutOctets 254280 0.0
Ip6InNoECTPkts 103 0.0
Ip6OutTransmits 145 0.0
TcpExtDelayedACKs 1 0.0
TcpExtTCPPureAcks 88 0.0
TcpExtTCPSackRecovery 9 0.0
TcpExtTCPLostRetransmit 10 0.0
TcpExtTCPLossFailures 1 0.0
TcpExtTCPFastRetrans 33 0.0
TcpExtTCPSlowStartRetrans 15 0.0
TcpExtTCPTimeouts 4 0.0
TcpExtTCPLossProbes 2 0.0
TcpExtTCPSackRecoveryFail 3 0.0
TcpExtTCPBacklogCoalesce 12 0.0
TcpExtTCPSackMerged 4 0.0
TcpExtTCPSackShiftFallback 9 0.0
TcpExtTCPOrigDataSent 120 0.0
TcpExtTCPDelivered 119 0.0
TcpExtTcpTimeoutRehash 4 0.0
IpExtInOctets 5820 0.0
IpExtOutOctets 246740 0.0
IpExtInNoECTPkts 103 0.0
== Receiver
#kernel
IpInReceives 23 0.0
IpInDelivers 22 0.0
TcpPassiveOpens 2 0.0
TcpInSegs 23 0.0
Ip6InReceives 21 0.0
Ip6InDelivers 21 0.0
Ip6InMcastPkts 1 0.0
Ip6InOctets 2262688 0.0
Ip6InMcastOctets 72 0.0
Ip6InNoECTPkts 1295 0.0
Icmp6InNeighborSolicits 1 0.0
Icmp6OutNeighborAdvertisements 1 0.0
Icmp6InType135 1 0.0
Icmp6OutType136 1 0.0
TcpExtTW 1 0.0
TcpExtTCPRcvCoalesce 72 0.0
TcpExtTCPOFOQueue 13 0.0
IpExtInOctets 2261596 0.0
IpExtInNoECTPkts 1295 0.0
TEST: GREv6/v4 - copy file w/ GSO [FAIL]
2026/01/06 17:25:21 socat[789] W exiting on signal 15
TEST: GREv6/v6 - copy file w/ TSO [ OK ]
2026/01/06 17:25:22 socat[825] W exiting on signal 15
Command exited with non-zero status 124
0.00user 0.10system 0:01.05elapsed 9%CPU (0avgtext+0avgdata 3720maxresident)k
0inputs+0outputs (0major+406minor)pagefaults 0swaps
== Sender
#kernel
TcpActiveOpens 1 0.0
TcpInSegs 408 0.0
TcpOutSegs 430 0.0
TcpRetransSegs 73 0.0
Ip6InReceives 818 0.0
Ip6InDelivers 817 0.0
Ip6OutRequests 464 0.0
Ip6InMcastPkts 1 0.0
Ip6OutMcastPkts 1 0.0
Ip6InOctets 81620 0.0
Ip6OutOctets 1460624 0.0
Ip6InMcastOctets 72 0.0
Ip6OutMcastOctets 72 0.0
Ip6InNoECTPkts 818 0.0
Ip6OutTransmits 928 0.0
Icmp6OutMsgs 1 0.0
Icmp6OutRouterSolicits 1 0.0
Icmp6OutType133 1 0.0
TcpExtDelayedACKs 1 0.0
TcpExtTCPPureAcks 238 0.0
TcpExtTCPSackRecovery 15 0.0
TcpExtTCPDSACKUndo 1 0.0
TcpExtTCPLostRetransmit 10 0.0
TcpExtTCPLossFailures 1 0.0
TcpExtTCPFastRetrans 57 0.0
TcpExtTCPSlowStartRetrans 12 0.0
TcpExtTCPTimeouts 4 0.0
TcpExtTCPLossProbes 8 0.0
TcpExtTCPSackRecoveryFail 3 0.0
TcpExtTCPBacklogCoalesce 161 0.0
TcpExtTCPDSACKRecv 1 0.0
TcpExtTCPSackShiftFallback 15 0.0
TcpExtTCPOrigDataSent 427 0.0
TcpExtTCPDelivered 427 0.0
TcpExtTcpTimeoutRehash 4 0.0
TcpExtTCPDSACKRecvSegs 1 0.0
== Receiver
#kernel
IpInReceives 21 0.0
IpInDelivers 21 0.0
TcpPassiveOpens 4 0.0
TcpInSegs 43 0.0
Ip6InReceives 65 0.0
Ip6InDelivers 65 0.0
Ip6InMcastPkts 1 0.0
Ip6InOctets 7658680 0.0
Ip6InMcastOctets 72 0.0
Ip6InNoECTPkts 3889 0.0
Icmp6InNeighborSolicits 1 0.0
Icmp6OutNeighborAdvertisements 1 0.0
Icmp6InType135 1 0.0
Icmp6OutType136 1 0.0
TcpExtTW 3 0.0
TcpExtDelayedACKLost 1 0.0
TcpExtTCPDSACKOldSent 1 0.0
TcpExtTCPRcvCoalesce 197 0.0
TcpExtTCPOFOQueue 30 0.0
IpExtInOctets 2294396 0.0
IpExtInNoECTPkts 1295 0.0
TEST: GREv6/v6 - copy file w/ GSO [FAIL]
2026/01/06 17:25:22 socat[812] W exiting on signal 15
Tests passed: 2
Tests failed: 2
If I increase the timeout to 3 or 4 sec it's enough time to finish the
file transfer regardless of the loss.
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-06 19:33 ` Eric Dumazet
2026-01-06 20:31 ` Jakub Kicinski
@ 2026-01-07 8:46 ` Florian Westphal
2026-01-07 9:01 ` Eric Dumazet
1 sibling, 1 reply; 11+ messages in thread
From: Florian Westphal @ 2026-01-07 8:46 UTC (permalink / raw)
To: Eric Dumazet
Cc: Jakub Kicinski, David S . Miller, Paolo Abeni, Simon Horman,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
Eric Dumazet <edumazet@google.com> wrote:
> On Tue, Jan 6, 2026 at 6:56 PM Jakub Kicinski <kuba@kernel.org> wrote:
> >
> > On Tue, 6 Jan 2026 14:45:29 +0000 Eric Dumazet wrote:
> > > v2: invert the conditions (Jakub)
> >
> > Thanks! Much better now, but still failing
> > tools/testing/selftests/net/gre_gso.sh
> >
> > TAP version 13
> > 1..1
> > # timeout set to 3600
> > # selftests: net: gre_gso.sh
> > # 2.16 [+2.16] TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> > # 3.16 [+1.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > # 3.17 [+0.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > # 3.17 [+0.00] TEST: GREv6/v4 - copy file w/ GSO [FAIL]
> > # 3.18 [+0.01] 2026/01/06 10:32:57 socat[20533] W exiting on signal 15
> > # 3.19 [+0.00] TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> > # 4.19 [+1.00] 2026/01/06 10:32:59 socat[20559] W exiting on signal 15
> > # 4.19 [+0.01] TEST: GREv6/v6 - copy file w/ GSO [FAIL]
> > # 4.20 [+0.01] 2026/01/06 10:32:59 socat[20549] W exiting on signal 15
> > # 4.22 [+0.02] 2026/01/06 10:32:59 socat[20560] W exiting on signal 15
> > # 4.23 [+0.01]
> > # 4.23 [+0.00] Tests passed: 2
> > # 4.23 [+0.00] Tests failed: 2
> > not ok 1 selftests: net: gre_gso.sh # exit=1
> >
> > https://netdev-ctrl.bots.linux.dev/logs/vmksft/net/results/461862/65-gre-gso-sh/stdout
>
> For some reason I am unable to run this test from a virtme-ng instance.
>
> I guess I wlll not make a new version of this patch, maybe Florian can
> take over.
Its failing because nhoff is moved by 14 bytes, test passes after doing:
- if (skb_vlan_inet_prepare(skb, false))
+ if (skb_vlan_inet_prepare(skb, true))
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-07 8:46 ` Florian Westphal
@ 2026-01-07 9:01 ` Eric Dumazet
2026-01-12 13:58 ` Simon Horman
0 siblings, 1 reply; 11+ messages in thread
From: Eric Dumazet @ 2026-01-07 9:01 UTC (permalink / raw)
To: Florian Westphal
Cc: Jakub Kicinski, David S . Miller, Paolo Abeni, Simon Horman,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Wed, Jan 7, 2026 at 9:46 AM Florian Westphal <fw@strlen.de> wrote:
>
> Eric Dumazet <edumazet@google.com> wrote:
> > On Tue, Jan 6, 2026 at 6:56 PM Jakub Kicinski <kuba@kernel.org> wrote:
> > >
> > > On Tue, 6 Jan 2026 14:45:29 +0000 Eric Dumazet wrote:
> > > > v2: invert the conditions (Jakub)
> > >
> > > Thanks! Much better now, but still failing
> > > tools/testing/selftests/net/gre_gso.sh
> > >
> > > TAP version 13
> > > 1..1
> > > # timeout set to 3600
> > > # selftests: net: gre_gso.sh
> > > # 2.16 [+2.16] TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> > > # 3.16 [+1.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > > # 3.17 [+0.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > > # 3.17 [+0.00] TEST: GREv6/v4 - copy file w/ GSO [FAIL]
> > > # 3.18 [+0.01] 2026/01/06 10:32:57 socat[20533] W exiting on signal 15
> > > # 3.19 [+0.00] TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> > > # 4.19 [+1.00] 2026/01/06 10:32:59 socat[20559] W exiting on signal 15
> > > # 4.19 [+0.01] TEST: GREv6/v6 - copy file w/ GSO [FAIL]
> > > # 4.20 [+0.01] 2026/01/06 10:32:59 socat[20549] W exiting on signal 15
> > > # 4.22 [+0.02] 2026/01/06 10:32:59 socat[20560] W exiting on signal 15
> > > # 4.23 [+0.01]
> > > # 4.23 [+0.00] Tests passed: 2
> > > # 4.23 [+0.00] Tests failed: 2
> > > not ok 1 selftests: net: gre_gso.sh # exit=1
> > >
> > > https://netdev-ctrl.bots.linux.dev/logs/vmksft/net/results/461862/65-gre-gso-sh/stdout
> >
> > For some reason I am unable to run this test from a virtme-ng instance.
> >
> > I guess I wlll not make a new version of this patch, maybe Florian can
> > take over.
>
> Its failing because nhoff is moved by 14 bytes, test passes after doing:
>
> - if (skb_vlan_inet_prepare(skb, false))
> + if (skb_vlan_inet_prepare(skb, true))
Thanks Florian.
I finally understood that my virtme-ng problem with this test is that
on my platform, /proc/sys/net/core/fb_tunnels_only_for_init_net was
set to 2
Tests have a hidden dependency against this sysctl.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-07 9:01 ` Eric Dumazet
@ 2026-01-12 13:58 ` Simon Horman
2026-01-12 15:24 ` Eric Dumazet
0 siblings, 1 reply; 11+ messages in thread
From: Simon Horman @ 2026-01-12 13:58 UTC (permalink / raw)
To: Eric Dumazet
Cc: Florian Westphal, Jakub Kicinski, David S . Miller, Paolo Abeni,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Wed, Jan 07, 2026 at 10:01:22AM +0100, Eric Dumazet wrote:
> On Wed, Jan 7, 2026 at 9:46 AM Florian Westphal <fw@strlen.de> wrote:
> >
> > Eric Dumazet <edumazet@google.com> wrote:
> > > On Tue, Jan 6, 2026 at 6:56 PM Jakub Kicinski <kuba@kernel.org> wrote:
> > > >
> > > > On Tue, 6 Jan 2026 14:45:29 +0000 Eric Dumazet wrote:
> > > > > v2: invert the conditions (Jakub)
> > > >
> > > > Thanks! Much better now, but still failing
> > > > tools/testing/selftests/net/gre_gso.sh
> > > >
> > > > TAP version 13
> > > > 1..1
> > > > # timeout set to 3600
> > > > # selftests: net: gre_gso.sh
> > > > # 2.16 [+2.16] TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> > > > # 3.16 [+1.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > > > # 3.17 [+0.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > > > # 3.17 [+0.00] TEST: GREv6/v4 - copy file w/ GSO [FAIL]
> > > > # 3.18 [+0.01] 2026/01/06 10:32:57 socat[20533] W exiting on signal 15
> > > > # 3.19 [+0.00] TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> > > > # 4.19 [+1.00] 2026/01/06 10:32:59 socat[20559] W exiting on signal 15
> > > > # 4.19 [+0.01] TEST: GREv6/v6 - copy file w/ GSO [FAIL]
> > > > # 4.20 [+0.01] 2026/01/06 10:32:59 socat[20549] W exiting on signal 15
> > > > # 4.22 [+0.02] 2026/01/06 10:32:59 socat[20560] W exiting on signal 15
> > > > # 4.23 [+0.01]
> > > > # 4.23 [+0.00] Tests passed: 2
> > > > # 4.23 [+0.00] Tests failed: 2
> > > > not ok 1 selftests: net: gre_gso.sh # exit=1
> > > >
> > > > https://netdev-ctrl.bots.linux.dev/logs/vmksft/net/results/461862/65-gre-gso-sh/stdout
> > >
> > > For some reason I am unable to run this test from a virtme-ng instance.
> > >
> > > I guess I wlll not make a new version of this patch, maybe Florian can
> > > take over.
> >
> > Its failing because nhoff is moved by 14 bytes, test passes after doing:
> >
> > - if (skb_vlan_inet_prepare(skb, false))
> > + if (skb_vlan_inet_prepare(skb, true))
>
> Thanks Florian.
>
> I finally understood that my virtme-ng problem with this test is that
> on my platform, /proc/sys/net/core/fb_tunnels_only_for_init_net was
> set to 2
>
> Tests have a hidden dependency against this sysctl.
Should unhide it by making the tests check or set this value?
It seems like a lot of time was lost on this already.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull()
2026-01-12 13:58 ` Simon Horman
@ 2026-01-12 15:24 ` Eric Dumazet
0 siblings, 0 replies; 11+ messages in thread
From: Eric Dumazet @ 2026-01-12 15:24 UTC (permalink / raw)
To: Simon Horman
Cc: Florian Westphal, Jakub Kicinski, David S . Miller, Paolo Abeni,
netdev, eric.dumazet, syzbot+6023ea32e206eef7920a,
Mazin Al Haddad
On Mon, Jan 12, 2026 at 2:58 PM Simon Horman <horms@kernel.org> wrote:
>
> On Wed, Jan 07, 2026 at 10:01:22AM +0100, Eric Dumazet wrote:
> > On Wed, Jan 7, 2026 at 9:46 AM Florian Westphal <fw@strlen.de> wrote:
> > >
> > > Eric Dumazet <edumazet@google.com> wrote:
> > > > On Tue, Jan 6, 2026 at 6:56 PM Jakub Kicinski <kuba@kernel.org> wrote:
> > > > >
> > > > > On Tue, 6 Jan 2026 14:45:29 +0000 Eric Dumazet wrote:
> > > > > > v2: invert the conditions (Jakub)
> > > > >
> > > > > Thanks! Much better now, but still failing
> > > > > tools/testing/selftests/net/gre_gso.sh
> > > > >
> > > > > TAP version 13
> > > > > 1..1
> > > > > # timeout set to 3600
> > > > > # selftests: net: gre_gso.sh
> > > > > # 2.16 [+2.16] TEST: GREv6/v4 - copy file w/ TSO [ OK ]
> > > > > # 3.16 [+1.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > > > > # 3.17 [+0.01] 2026/01/06 10:32:57 socat[20546] W exiting on signal 15
> > > > > # 3.17 [+0.00] TEST: GREv6/v4 - copy file w/ GSO [FAIL]
> > > > > # 3.18 [+0.01] 2026/01/06 10:32:57 socat[20533] W exiting on signal 15
> > > > > # 3.19 [+0.00] TEST: GREv6/v6 - copy file w/ TSO [ OK ]
> > > > > # 4.19 [+1.00] 2026/01/06 10:32:59 socat[20559] W exiting on signal 15
> > > > > # 4.19 [+0.01] TEST: GREv6/v6 - copy file w/ GSO [FAIL]
> > > > > # 4.20 [+0.01] 2026/01/06 10:32:59 socat[20549] W exiting on signal 15
> > > > > # 4.22 [+0.02] 2026/01/06 10:32:59 socat[20560] W exiting on signal 15
> > > > > # 4.23 [+0.01]
> > > > > # 4.23 [+0.00] Tests passed: 2
> > > > > # 4.23 [+0.00] Tests failed: 2
> > > > > not ok 1 selftests: net: gre_gso.sh # exit=1
> > > > >
> > > > > https://netdev-ctrl.bots.linux.dev/logs/vmksft/net/results/461862/65-gre-gso-sh/stdout
> > > >
> > > > For some reason I am unable to run this test from a virtme-ng instance.
> > > >
> > > > I guess I wlll not make a new version of this patch, maybe Florian can
> > > > take over.
> > >
> > > Its failing because nhoff is moved by 14 bytes, test passes after doing:
> > >
> > > - if (skb_vlan_inet_prepare(skb, false))
> > > + if (skb_vlan_inet_prepare(skb, true))
> >
> > Thanks Florian.
> >
> > I finally understood that my virtme-ng problem with this test is that
> > on my platform, /proc/sys/net/core/fb_tunnels_only_for_init_net was
> > set to 2
> >
> > Tests have a hidden dependency against this sysctl.
>
> Should unhide it by making the tests check or set this value?
>
> It seems like a lot of time was lost on this already.
Or we could change iproute2 to no longer rely on the default devices.
2029 execve("/bin/ip", ["ip", "tunnel", "add", "gre1", "mode",
"ip6gre", "local", "fe80::782c:82ff:fe5d:68cc", "remote",
"fe80::8827:efff:feaf:1d87", "dev", "veth0"], 0x56329212d6e0 /* 12
vars */) = 0
2029 setsockopt(4, SOL_NETLINK, NETLINK_EXT_ACK, [1], 4) = 0
2029 bind(4, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 0
2029 getsockname(4, {sa_family=AF_NETLINK, nl_pid=-2025971371,
nl_groups=00000000}, [12]) = 0
2029 sendmsg(4, {msg_name={sa_family=AF_NETLINK, nl_pid=0,
nl_groups=00000000}, msg_namelen=12,
msg_iov=[{iov_base=[{nlmsg_len=52, nlmsg_type=RTM_GETLINK,
nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=1768231049, nlmsg_pid=0},
{ifi_family=AF_UNSPEC, ifi_type=ARPHRD_NETROM, ifi_index=0,
ifi_flags=0, ifi_change=0}, [[{nla_len=8, nla_type=IFLA_EXT_MASK},
RTEXT_FILTER_VF|RTEXT_FILTER_SKIP_STATS], [{nla_len=10,
nla_type=IFLA_IFNAME}, "veth0"]]], iov_len=52}], msg_iovlen=1,
msg_controllen=0, msg_flags=0}, 0) = 52
2029 recvmsg(4, {msg_name={sa_family=AF_NETLINK, nl_pid=0,
nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=NULL,
iov_len=0}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_TRUNC},
MSG_PEEK|MSG_TRUNC) = 832
2029 recvmsg(4, {msg_name={sa_family=AF_NETLINK, nl_pid=0,
nl_groups=00000000}, msg_namelen=12,
msg_iov=[{iov_base=[{nlmsg_len=832, nlmsg_type=RTM_NEWLINK,
nlmsg_flags=0, nlmsg_seq=1768231049, nlmsg_pid=-2025971371},
{ifi_family=AF_UNSPEC, ifi_type=ARPHRD_ETHER,
ifi_index=if_nametoindex("veth0"),
ifi_flags=IFF_UP|IFF_BROADCAST|IFF_RUNNING|IFF_MULTICAST|IFF_LOWER_UP,
ifi_change=0}, [[{nla_len=10, nla_type=IFLA_IFNAME}, "veth0"],
[{nla_len=8, nla_type=IFLA_TXQLEN}, 1000], [{nla_len=5,
nla_type=IFLA_OPERSTATE}, 6], [{nla_len=5, nla_type=IFLA_LINKMODE},
0], [{nla_len=5, nla_type=IFLA_NETNS_IMMUTABLE}, 0], [{nla_len=8,
nla_type=IFLA_MTU}, 1500], [{nla_len=8, nla_type=IFLA_MIN_MTU}, 68],
[{nla_len=8, nla_type=IFLA_MAX_MTU}, 65535], [{nla_len=8,
nla_type=IFLA_GROUP}, 0], [{nla_len=8, nla_type=IFLA_PROMISCUITY}, 0],
[{nla_len=8, nla_type=IFLA_ALLMULTI}, 0], [{nla_len=8,
nla_type=IFLA_NUM_TX_QUEUES}, 8], [{nla_len=8,
nla_type=IFLA_GSO_MAX_SEGS}, 65535], [{nla_len=8,
nla_type=IFLA_GSO_MAX_SIZE}, 65536], [{nla_len=8,
nla_type=IFLA_GRO_MAX_SIZE}, 65536], [{nla_len=8,
nla_type=IFLA_GSO_IPV4_MAX_SIZE}, 65536], [{nla_len=8,
nla_type=IFLA_GRO_IPV4_MAX_SIZE}, 65536], [{nla_len=8,
nla_type=IFLA_TSO_MAX_SIZE}, 524280], [{nla_len=8,
nla_type=IFLA_TSO_MAX_SEGS}, 65535], [{nla_len=8,
nla_type=IFLA_MAX_PACING_OFFLOAD_HORIZON}, "\x00\x00\x00\x00"],
[{nla_len=8, nla_type=IFLA_NUM_RX_QUEUES}, 8], [{nla_len=5,
nla_type=IFLA_CARRIER}, 1], [{nla_len=8,
nla_type=IFLA_CARRIER_CHANGES}, 2], [{nla_len=8,
nla_type=IFLA_CARRIER_UP_COUNT}, 1], [{nla_len=8,
nla_type=IFLA_CARRIER_DOWN_COUNT}, 1], [{nla_len=6, nla_type=0x44 /*
IFLA_??? */}, "\x00\x00"], [{nla_len=6, nla_type=0x45 /* IFLA_??? */},
"\x00\x00"], [{nla_len=5, nla_type=IFLA_PROTO_DOWN}, 0], [{nla_len=10,
nla_type=IFLA_ADDRESS}, 16:ad:38:9c:d2:4b], [{nla_len=10,
nla_type=IFLA_BROADCAST}, ff:ff:ff:ff:ff:ff], [{nla_len=12,
nla_type=IFLA_XDP}, [{nla_len=5, nla_type=IFLA_XDP_ATTACHED},
XDP_ATTACHED_NONE]], [{nla_len=16, nla_type=IFLA_LINKINFO},
[{nla_len=9, nla_type=IFLA_INFO_KIND}, "veth"]], ...]],
iov_len=32768}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) =
832
2029 close(4) = 0
2029 socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP) = 4
2029 ioctl(4, _IOC(_IOC_NONE, 0x89, 0xf1, 0), 0x7fff4a526580) = -1
ENODEV (No such device)
2029 write(2, "add tunnel \"ip6gre0\" failed: No "..., 44) = 44
2029 close(4) = 0
2029 exit_group(1) = ?
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2026-01-12 15:25 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-01-06 14:45 [PATCH v2 net] ip6_gre: use skb_vlan_inet_prepare() instead of pskb_inet_may_pull() Eric Dumazet
2026-01-06 17:56 ` Jakub Kicinski
2026-01-06 19:33 ` Eric Dumazet
2026-01-06 20:31 ` Jakub Kicinski
2026-01-06 21:25 ` Eric Dumazet
2026-01-06 21:33 ` Eric Dumazet
2026-01-06 22:28 ` Jakub Kicinski
2026-01-07 8:46 ` Florian Westphal
2026-01-07 9:01 ` Eric Dumazet
2026-01-12 13:58 ` Simon Horman
2026-01-12 15:24 ` Eric Dumazet
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