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linux-sg2042/net/decnet
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Mateusz Jurczyk dd0da17b20 decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb 
Verify that the length of the socket buffer is sufficient to cover the
nlmsghdr structure before accessing the nlh->nlmsg_len field for further
input sanitization. If the client only supplies 1-3 bytes of data in
sk_buff, then nlh->nlmsg_len remains partially uninitialized and
contains leftover memory from the corresponding kernel allocation.
Operating on such data may result in indeterminate evaluation of the
nlmsg_len < sizeof(*nlh) expression.

The bug was discovered by a runtime instrumentation designed to detect
use of uninitialized memory in the kernel. The patch prevents this and
other similar tools (e.g. KMSAN) from flagging this behavior in the future.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-06-08 10:51:22 -04:00
..
netfilter decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb 2017-06-08 10:51:22 -04:00
Kconfig net/decnet: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:39:34 -08:00
Makefile
…
README
…
TODO
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af_decnet.c format-security: move static strings to const 2017-05-08 17:15:14 -07:00
dn_dev.c net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
dn_fib.c net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
dn_neigh.c DECnet: Use container_of() for embedded struct 2017-05-09 09:39:49 -04:00
dn_nsp_in.c netfilter: Pass net into okfn 2015-09-17 17:18:37 -07:00
dn_nsp_out.c net: Pass net into dst_output and remove dst_output_okfn 2015-10-08 04:26:54 -07:00
dn_route.c net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
dn_rules.c net: ipv6: use common fib_default_rule_pref 2015-09-09 14:19:50 -07:00
dn_table.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
dn_timer.c decnet: Use time_after_eq 2014-08-22 12:23:11 -07:00
sysctl_net_decnet.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00

README 

                       Linux DECnet Project
                      ======================

The documentation for this kernel subsystem is available in the
Documentation/networking subdirectory of this distribution and also
on line at http://www.chygwyn.com/DECnet/

Steve Whitehouse <SteveW@ACM.org>