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Florian Westphal 6a7ac3d205 tunnels: fix kasan splat when generating ipv4 pmtu error 
If we try to emit an icmp error in response to a nonliner skb, we get

BUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220
Read of size 4 at addr ffff88811c50db00 by task iperf3/1691
CPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309
[..]
 kasan_report+0x105/0x140
 ip_compute_csum+0x134/0x220
 iptunnel_pmtud_build_icmp+0x554/0x1020
 skb_tunnel_check_pmtu+0x513/0xb80
 vxlan_xmit_one+0x139e/0x2ef0
 vxlan_xmit+0x1867/0x2760
 dev_hard_start_xmit+0x1ee/0x4f0
 br_dev_queue_push_xmit+0x4d1/0x660
 [..]

ip_compute_csum() cannot deal with nonlinear skbs, so avoid it.
After this change, splat is gone and iperf3 is no longer stuck.

Fixes: 4cb47a8644 ("tunnels: PMTU discovery support for directly bridged IP packets")
Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20230803152653.29535-2-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-08-04 18:24:52 -07:00
..
6lowpan
9p 9p: remove dead stores (variable set again without being read) 2023-07-20 19:14:50 +00:00
802
8021q
appletalk sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
atm sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
ax25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
batman-adv
bluetooth Bluetooth: MGMT: Use correct address for memcpy() 2023-07-20 11:27:22 -07:00
bpf
bpfilter
bridge Revert "bridge: Add extack warning when enabling STP in netns." 2023-07-20 10:46:28 +02:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
ceph rbd: harden get_lock_owner_info() a bit 2023-07-26 15:08:09 +02:00
core pull-request: bpf 2023-08-03 2023-08-03 11:22:53 -07:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
devlink
dns_resolver
dsa net: dsa: fix older DSA drivers using phylink 2023-07-27 17:19:46 -07:00
ethernet
ethtool
handshake
hsr
ieee802154 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
ife
ipv4 tunnels: fix kasan splat when generating ipv4 pmtu error 2023-08-04 18:24:52 -07:00
ipv6 ip6mr: Fix skb_under_panic in ip6mr_cache_report() 2023-08-02 10:35:21 +01:00
iucv
kcm sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
key sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
l2tp net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
l3mdev
lapb
llc llc: Don't drop packet from non-root netns. 2023-07-20 10:46:28 +02:00
mac80211 - New Drivers 2023-07-03 11:26:05 -07:00
mac802154 Core WPAN changes: 2023-06-24 15:41:46 -07:00
mctp sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
mpls
mptcp mptcp: fix the incorrect judgment for msk->cb_flags 2023-08-04 15:22:13 -07:00
ncsi
netfilter net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
netlabel
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-06-27 09:45:22 -07:00
netrom sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-06-27 09:45:22 -07:00
nsh
openvswitch
packet net/packet: annotate data-races around tp->status 2023-08-04 18:03:16 -07:00
phonet sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
psample
qrtr Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
rds sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
rfkill
rose sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
rxrpc Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
sched net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free 2023-07-31 20:10:37 -07:00
sctp sctp: fix potential deadlock on &net->sctp.addr_wq_lock 2023-06-29 11:49:42 +02:00
smc net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
strparser
sunrpc NFS client updates for Linux 6.5 2023-07-01 14:38:25 -07:00
switchdev
tipc tipc: stop tipc crypto on failure in tipc_node_create 2023-07-27 11:45:05 +02:00
tls net: Kill MSG_SENDPAGE_NOTLAST 2023-06-24 15:50:13 -07:00
unix net: add missing data-race annotations around sk->sk_peek_off 2023-07-29 18:13:41 +01:00
vmw_vsock sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
wireless wifi: cfg80211: Fix return value in scan logic 2023-07-26 10:08:07 +03:00
x25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
xdp net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
xfrm net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
compat.c
devres.c
Kconfig
Kconfig.debug
Makefile
socket.c Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
sysctl_net.c