sctp: asconf's process should verify address parameter is in the beginning

in sctp_process_asconf(), we get address parameter from the beginning of
the addip params. but we never check if it's really there. if the addr
param is not there, it still can pass sctp_verify_asconf(), then to be
handled by sctp_process_asconf(), it will not be safe.

so add a code in sctp_verify_asconf() to check the address parameter is in
the beginning, or return false to send abort.

note that this can also detect multiple address parameters, and reject it.

Signed-off-by: Xin Long <>
Signed-off-by: Marcelo Ricardo Leitner <>
Acked-by: Vlad Yasevich <>
Signed-off-by: David S. Miller <>
1 file changed