]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[NETLABEL]: Fix NULL deref in netlbl_unlabel_staticlist_gen() if ifindex not found
authorJesper Juhl <jesper.juhl@gmail.com>
Fri, 18 Apr 2008 06:22:54 +0000 (23:22 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 18 Apr 2008 06:22:54 +0000 (23:22 -0700)
commit794eb6bf20ebf992c040ea831cd3a9c64b0c1f7a
tree41d710fe62265b95b2e3e0cd9fa49d5ffe65fb81
parentf5ba2d32170679eb9b7c251ac3d9687916a41c18
[NETLABEL]: Fix NULL deref in netlbl_unlabel_staticlist_gen() if ifindex not found

dev_get_by_index() may return NULL if nothing is found. In
net/netlabel/netlabel_unlabeled.c::netlbl_unlabel_staticlist_gen() the
function is called, but the return value is never checked. If it returns
NULL then we'll deref a NULL pointer on the very next line.
I checked the callers, and I don't think this can actually happen today,
but code changes over time and in the future it might happen and it does
no harm to be defensive and check for the failure, so that if/when it
happens we'll fail gracefully instead of crashing.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/netlabel/netlabel_unlabeled.c