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Florian Westphal ed6b7164b4 netfilter: ipv4: defrag: set local_df flag on defragmented skb 
commit 895162b110 upstream.

else we may fail to forward skb even if original fragments do fit
outgoing link mtu:

1. remote sends 2k packets in two 1000 byte frags, DF set
2. we want to forward but only see '2k > mtu and DF set'
3. we then send icmp error saying that outgoing link is 1500

But original sender never sent a packet that would not fit
the outgoing link.

Setting local_df makes outgoing path test size vs.
IPCB(skb)->frag_max_size, so we will still send the correct
error in case the largest original size did not fit
outgoing link mtu.

Reported-by: Maxime Bizon <mbizon@freebox.fr>
Suggested-by: Maxime Bizon <mbizon@freebox.fr>
Fixes: 5f2d04f1f9 (ipv4: fix path MTU discovery with connection tracking)
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-16 13:42:53 -07:00
..
9p 9p/trans_virtio.c: Fix broken zero-copy on vmalloc() buffers 2014-03-06 21:30:03 -08:00
802 net/802/mrp: fix lockdep splat 2013-05-14 13:02:30 -07:00
8021q vlan: Fix lockdep warning when vlan dev handle notification 2014-05-30 21:52:15 -07:00
appletalk net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
atm net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
ax25 net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
batman-adv batman-adv: set up network coding packet handlers during module init 2013-11-20 12:27:47 -08:00
bluetooth Bluetooth: Fix redundant encryption request for reauthentication 2014-06-07 13:25:33 -07:00
bridge bridge: Handle IFLA_ADDRESS correctly when creating bridge device 2014-05-30 21:52:16 -07:00
caif net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
can can: add destructor for self generated skbs 2014-03-06 21:30:03 -08:00
ceph libceph: fix corruption when using page_count 0 page in rbd 2014-06-07 13:25:40 -07:00
core net-gro: reset skb->truesize in napi_reuse_skb() 2014-05-30 21:52:16 -07:00
dcb rtnetlink: Remove passing of attributes into rtnl_doit functions 2013-03-22 10:31:16 -04:00
dccp net:dccp: do not report ICMP redirects to user space 2013-10-13 16:08:30 -07:00
decnet decnet: remove duplicated include from dn_table.c 2013-04-07 17:12:01 -04:00
dns_resolver
dsa dsa: fix freeing of sparse port allocation 2013-03-25 12:23:41 -04:00
ethernet net: add ETH_P_802_3_MIN 2013-03-28 01:20:42 -04:00
ieee802154 6lowpan: fix lockdep splats 2014-03-06 21:30:02 -08:00
ipv4 netfilter: ipv4: defrag: set local_df flag on defragmented skb 2014-06-16 13:42:53 -07:00
ipv6 netfilter: Fix potential use after free in ip6_route_me_harder() 2014-06-11 12:03:27 -07:00
ipx net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
irda net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
iucv net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
key net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
l2tp l2tp: take PMTU from tunnel UDP socket 2014-05-30 21:52:14 -07:00
lapb net/lapb: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:40:01 -08:00
llc net: llc: fix use after free in llc_ui_recvmsg 2014-01-15 15:28:50 -08:00
mac80211 mac80211: fix on-channel remain-on-channel 2014-06-07 13:25:31 -07:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-04-30 03:55:20 -04:00
netfilter netfilter: nf_conntrack_dccp: fix skb_header_pointer API usages 2014-04-03 12:01:05 -07:00
netlabel netlabel: improve domain mapping validation 2013-05-19 14:49:55 -07:00
netlink net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
netrom net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
nfc net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
openvswitch openvswitch: Remove unneeded ovs_netdev_get_ifindex() 2013-04-30 00:19:11 -04:00
packet net: Fix ns_capable check in sock_diag_put_filterinfo 2014-05-30 21:52:15 -07:00
phonet inet: prevent leakage of uninitialized memory to user in recv syscalls 2013-12-08 07:29:25 -08:00
rds rds: prevent dereference of a NULL device in rds_iw_laddr_check 2014-04-14 06:42:18 -07:00
rfkill Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2013-04-22 14:58:14 -04:00
rose net: rose: restore old recvmsg behavior 2014-01-15 15:28:49 -08:00
rxrpc net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
sched net_sched: htb: fix a typo in htb_change_class() 2013-10-13 16:08:29 -07:00
sctp sctp: reset flowi4_oif parameter on route lookup 2014-05-30 21:52:16 -07:00
sunrpc nfsd: check passed socket's net matches NFSd superblock's one 2014-05-06 07:55:29 -07:00
tipc net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
unix net: unix: non blocking recvmsg() should not return -EINTR 2014-04-14 06:42:15 -07:00
vmw_vsock net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
wimax
wireless radiotap: fix bitmap-end-finding buffer overrun 2014-01-09 12:24:23 -08:00
x25 net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
xfrm xfrm: force a garbage collection after deleting a policy 2013-05-31 17:30:07 -07:00
compat.c x86, x32: Correct invalid use of user timespec in the kernel 2014-02-06 11:08:12 -08:00
Kconfig netlink: kconfig: move mmap i/o into netlink kconfig 2013-05-01 15:02:42 -04:00
Makefile VSOCK: Introduce VM Sockets 2013-02-10 19:41:08 -05:00
nonet.c
socket.c net: socket: error on a negative msg_namelen 2014-04-14 06:42:16 -07:00
sysctl_net.c net: Update the sysctl permissions handler to test effective uid/gid 2013-10-13 16:08:34 -07:00