]> git.karo-electronics.de Git - linux-beck.git/commit
rtnl: stats - add missing netlink message size checks
authorMathias Krause <minipli@googlemail.com>
Wed, 28 Dec 2016 16:52:15 +0000 (17:52 +0100)
committerDavid S. Miller <davem@davemloft.net>
Thu, 29 Dec 2016 19:05:15 +0000 (14:05 -0500)
commit4775cc1f2d5abca894ac32774eefc22c45347d1c
treeac0f9d20f70784f778aa821c870bb0dcf3ccd6a8
parentb2eb09af7370fedc6b9d9f05762f01625438467a
rtnl: stats - add missing netlink message size checks

We miss to check if the netlink message is actually big enough to contain
a struct if_stats_msg.

Add a check to prevent userland from sending us short messages that would
make us access memory beyond the end of the message.

Fixes: 10c9ead9f3c6 ("rtnetlink: add new RTM_GETSTATS message to dump...")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/rtnetlink.c