tree 554176a9ed7964f711456c7dd41427b2bf8dc2dd
parent 9ea8aa8d5087529210553114b7bc4bf4374ace8f
author Tilman Schmidt <tilman@imap.cc> 1413027990 +0200
committer David S. Miller <davem@davemloft.net> 1413313534 -0400

isdn/capi: prevent index overrun from command_2_index()

The result of the function command_2_index() is used to index two
arrays mnames[] and cpars[] with max. index 0x4e but in its current
form that function can produce results up to 3*(0x9+0x9)+0x7f =
0xb5.
Fix by clamping all result values potentially overrunning the arrays
to zero which is already handled as an invalid value.

Re-spotted with Coverity.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>