tree 739b5eb674a433077fb3486f7c305ca1720b3215
parent 895e1fc7226e6732bc77138955b6c7dfa279f57a
author Paul Mackerras <paulus@samba.org> 1177013152 -0700
committer David S. Miller <davem@davemloft.net> 1177013152 -0700

[PPP]: Fix skbuff.c:BUG due incorrect logic in process_input_packet()

From: Paul Mackerras <paulus@samba.org>

This fixes:

Subject: kernel BUG at net/core/skbuff.c in linux-2.6.21-rc6

process_input_packet() treats the case where the first byte is 0xff
(PPP_ALLSTATIONS) but the second byte is 0x03 (PPP_UI) as indicating a
packet with a PPP protocol number of 0xff.  Arguably that's wrong
since PPP protocol 0xff is reserved, and the RFC does envision the
possibility of receiving frames where the control field has values
other than 0x03.

Signed-off-by: David S. Miller <davem@davemloft.net>