]> git.baikalelectronics.ru Git - kernel.git/commit
sctp: check af before verify address in sctp_addr_id2transport
authorXin Long <lucien.xin@gmail.com>
Tue, 7 Feb 2017 12:56:08 +0000 (20:56 +0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 7 Feb 2017 19:07:23 +0000 (14:07 -0500)
commit1d034fa00fdba397cd433623bc284351a296e9f8
tree9ed1ca48c2fa569d1a974fb2b0bbfb9871d8b343
parentfe5c5b13a7d28f9b3d3f7c49df251d09c9a80a6c
sctp: check af before verify address in sctp_addr_id2transport

Commit b1afce70f82b ("sctp: sctp_addr_id2transport should verify the
addr before looking up assoc") invoked sctp_verify_addr to verify the
addr.

But it didn't check af variable beforehand, once users pass an address
with family = 0 through sockopt, sctp_get_af_specific will return NULL
and NULL pointer dereference will be caused by af->sockaddr_len.

This patch is to fix it by returning NULL if af variable is NULL.

Fixes: b1afce70f82b ("sctp: sctp_addr_id2transport should verify the addr before looking up assoc")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sctp/socket.c