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linux/net/tipc
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Jon Maloy d618d09a68 tipc: enforce valid ratio between skb truesize and contents 
The socket level flow control is based on the assumption that incoming
buffers meet the condition (skb->truesize / roundup(skb->len) <= 4),
where the latter value is rounded off upwards to the nearest 1k number.
This does empirically hold true for the device drivers we know, but we
cannot trust that it will always be so, e.g., in a system with jumbo
frames and very small packets.

We now introduce a check for this condition at packet arrival, and if
we find it to be false, we copy the packet to a new, smaller buffer,
where the condition will be true. We expect this to affect only a small
fraction of all incoming packets, if at all.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-16 10:49:00 +09:00
..
addr.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
addr.h tipc: introduce constants for tipc address validation 2016-07-26 14:26:42 -07:00
bcast.c tipc: improve destination linked list 2017-10-13 08:46:00 -07:00
bcast.h tipc: make replicast a user selectable option 2017-01-20 12:10:17 -05:00
bearer.c tipc: remove unnecessary call to dev_net() 2017-09-06 21:25:52 -07:00
bearer.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
core.c netns: make struct pernet_operations::id unsigned int 2016-11-18 10:59:15 -05:00
core.h tipc: add ability to order and receive topology events in driver 2017-10-13 08:46:00 -07:00
discover.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
discover.h tipc: eliminate buffer leak in bearer layer 2016-04-07 17:00:13 -04:00
eth_media.c tipc: make media address offset a common define 2015-02-27 18:18:48 -05:00
group.c tipc: add multipoint-to-point flow control 2017-10-13 08:46:01 -07:00
group.h tipc: guarantee that group broadcast doesn't bypass group unicast 2017-10-13 08:46:01 -07:00
ib_media.c tipc: rename media/msg related definitions 2015-02-27 18:18:48 -05:00
Kconfig tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
link.c tipc: improve link resiliency when rps is activated 2017-11-11 15:36:05 +09:00
link.h tipc: transfer broadcast nacks in link state messages 2016-09-02 17:10:24 -07:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
monitor.c tipc: eliminate unnecessary probing 2017-11-03 15:48:46 +09:00
monitor.h tipc: dump monitor attributes 2016-07-26 14:26:42 -07:00
msg.c tipc: enforce valid ratio between skb truesize and contents 2017-11-16 10:49:00 +09:00
msg.h tipc: enforce valid ratio between skb truesize and contents 2017-11-16 10:49:00 +09:00
name_distr.c tipc: allocate user memory with GFP_KERNEL flag 2017-01-16 13:31:53 -05:00
name_distr.h tipc: reduce code dependency between binding table and node layer 2015-11-20 14:06:10 -05:00
name_table.c tipc: eliminate KASAN warning 2017-10-26 09:38:34 +09:00
name_table.h tipc: introduce group anycast messaging 2017-10-13 08:46:00 -07:00
net.c netlink: pass extended ACK struct where available 2017-04-13 13:58:22 -04:00
net.h tipc: add peer removal functionality 2016-08-18 23:36:07 -07:00
netlink_compat.c net: tipc: constify genl_ops 2017-08-23 22:31:38 -07:00
netlink.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
netlink.h tipc: make cluster size threshold for monitoring configurable 2016-07-26 14:26:42 -07:00
node.c tipc: enforce valid ratio between skb truesize and contents 2017-11-16 10:49:00 +09:00
node.h tipc: introduce communication groups 2017-10-13 08:46:00 -07:00
server.c tipc: checking for NULL instead of IS_ERR() 2017-10-20 08:34:00 +01:00
server.h tipc: add ability to order and receive topology events in driver 2017-10-13 08:46:00 -07:00
socket.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
socket.h tipc: redesign connection-level flow control 2016-05-03 15:51:16 -04:00
subscr.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
subscr.h tipc: adjust the policy of holding subscription kref 2017-03-28 18:03:33 -07:00
sysctl.c tipc: add name distributor resiliency queue 2014-09-01 17:51:48 -07:00
udp_media.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
udp_media.h tipc: add UDP remoteip dump to netlink API 2016-08-26 21:38:41 -07:00