Skip to main content

Browse the archive

https://github.com/torvalds/linux
05 April 2024, 19:05:47 UTC
Revision 30c7be26fd3587abcb69587f781098e3ca2d565b authored by Eric Dumazet on 22 November 2016, 17:06:45 UTC, committed by David S. Miller on 24 November 2016, 20:32:14 UTC 
udplite: call proper backlog handlers
 
In commits 93821778def10 ("udp: Fix rcv socket locking") and
f7ad74fef3af ("net/ipv6/udp: UDP encapsulation: break backlog_rcv into
__udpv6_queue_rcv_skb") UDP backlog handlers were renamed, but UDPlite
was forgotten.

This leads to crashes if UDPlite header is pulled twice, which happens
starting from commit e6afc8ace6dd ("udp: remove headers from UDP packets
before queueing")

Bug found by syzkaller team, thanks a lot guys !

Note that backlog use in UDP/UDPlite is scheduled to be removed starting
from linux-4.10, so this patch is only needed up to linux-4.9

Fixes: 93821778def1 ("udp: Fix rcv socket locking")
Fixes: f7ad74fef3af ("net/ipv6/udp: UDP encapsulation: break backlog_rcv into __udpv6_queue_rcv_skb")
Fixes: e6afc8ace6dd ("udp: remove headers from UDP packets before queueing")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 764d3be
History
Tip revision: 30c7be26fd3587abcb69587f781098e3ca2d565b authored by Eric Dumazet on 22 November 2016, 17:06:45 UTC
udplite: call proper backlog handlers
Tip revision: 30c7be2
File Mode Size
.gitignore -rw-r--r-- 151 bytes
Kconfig -rw-r--r-- 2.9 KB
Makefile -rw-r--r-- 2.3 KB
gen_init_cpio.c -rw-r--r-- 12.7 KB
initramfs_data.S -rw-r--r-- 1.3 KB
back to top