linux-sg2042/net/xfrm
Michal Kubecek 12e3594698 xfrm: prevent ipcomp scratch buffer race condition
In ipcomp_compress(), sortirq is enabled too early, allowing the
per-cpu scratch buffer to be rewritten by ipcomp_decompress()
(called on the same CPU in softirq context) between populating
the buffer and copying the compressed data to the skb.

v2: as pointed out by Steffen Klassert, if we also move the
local_bh_disable() before reading the per-cpu pointers, we can
get rid of get_cpu()/put_cpu().

v3: removed ipcomp_decompress part (as explained by Herbert Xu,
it cannot be called from process context), get rid of cpu
variable (thanks to Eric Dumazet)

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2013-10-18 10:00:00 +02:00
..
Kconfig net/xfrm: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:40:03 -08:00
Makefile xfrm: make xfrm_algo.c a module 2012-05-15 13:13:34 -04:00
xfrm_algo.c xfrm: add rfc4494 AES-CMAC-96 support 2013-04-25 21:01:48 +08:00
xfrm_hash.c net: allow GFP_HIGHMEM in __vmalloc() 2010-11-21 10:04:04 -08:00
xfrm_hash.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
xfrm_input.c xfrm: add LINUX_MIB_XFRMACQUIREERROR statistic counter 2013-06-06 06:45:55 +02:00
xfrm_ipcomp.c xfrm: prevent ipcomp scratch buffer race condition 2013-10-18 10:00:00 +02:00
xfrm_output.c xfrm: choose protocol family by skb protocol 2013-08-19 09:39:04 +02:00
xfrm_policy.c xfrm: check for a vaild skb in xfrm_policy_queue_process 2013-10-08 10:49:51 +02:00
xfrm_proc.c xfrm: add LINUX_MIB_XFRMACQUIREERROR statistic counter 2013-06-06 06:45:55 +02:00
xfrm_replay.c xfrm: Fix aevent generation for each received packet 2013-09-25 07:32:48 +02:00
xfrm_state.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-09-05 14:58:52 -04:00
xfrm_sysctl.c net: Don't export sysctls to unprivileged users 2012-11-18 20:30:55 -05:00
xfrm_user.c xfrm: Guard IPsec anti replay window against replay bitmap 2013-09-17 12:17:10 +02:00