Davide Caratti 13de4ed9e3 net: skbuff: ensure LSE is pullable before decrementing the MPLS ttl
skb_mpls_dec_ttl() reads the LSE without ensuring that it is contained in
the skb "linear" area. Fix this calling pskb_may_pull() before reading the
current ttl.

Found by code inspection.

Fixes: 2a2ea50870ba ("net: sched: add mpls manipulation actions to TC")
Reported-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Link: https://lore.kernel.org/r/53659f28be8bc336c113b5254dc637cc76bbae91.1606987074.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-03 11:13:21 -08:00
..
2020-04-20 12:43:24 -07:00
2020-03-29 22:30:57 -07:00
2019-12-12 17:07:05 -08:00
2020-06-18 20:46:23 -07:00