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scsi: iscsi_tcp: restrict to TCP sockets
[ Upstream commitf4f82c52a0
] Nothing prevents iscsi_sw_tcp_conn_bind() to receive file descriptor pointing to non TCP socket (af_unix for example). Return -EINVAL if this is attempted, instead of crashing the kernel. Fixes:7ba2471389
("[SCSI] open-iscsi/linux-iscsi-5 Initiator: Initiator code") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Lee Duncan <lduncan@suse.com> Cc: Chris Leech <cleech@redhat.com> Cc: Mike Christie <michael.christie@oracle.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: open-iscsi@googlegroups.com Cc: linux-scsi@vger.kernel.org Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -724,6 +724,10 @@ iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session,
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return -EEXIST;
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}
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err = -EINVAL;
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if (!sk_is_tcp(sock->sk))
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goto free_socket;
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err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
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if (err)
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goto free_socket;
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