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x25: Patch to fix bug 15678 - x25 accesses fields beyond end of packet.

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Here is a patch to stop X.25 examining fields beyond the end of the packet.

For example, when a simple CALL ACCEPTED was received:

	10 10 0f

x25_parse_facilities was attempting to decode the FACILITIES field, but this
packet contains no facilities field.

Signed-off-by: John Hughes <john@calva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hughes
2010-04-07 21:29:25 -07:00
committed by David S. Miller
parent fd218cf955
commit f5eb917b86
4 changed files with 72 additions and 6 deletions
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4
include/net/x25.h
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@@ -182,6 +182,10 @@ extern int sysctl_x25_clear_request_timeout;
extern int sysctl_x25_ack_holdback_timeout;
extern int sysctl_x25_forward;
extern int x25_parse_address_block(struct sk_buff *skb,
struct x25_address *called_addr,
struct x25_address *calling_addr);
extern int x25_addr_ntoa(unsigned char *, struct x25_address *,
struct x25_address *);
extern int x25_addr_aton(unsigned char *, struct x25_address *,