Tilman Schmidt 5362247a42
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 >
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5362247a42