From: Hefty, Sean Date: Thu, 6 Oct 2011 16:33:05 +0000 (-0700) Subject: IB/mad: Verify mgmt class in received MADs X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b7ab0b19a85f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git IB/mad: Verify mgmt class in received MADs If a received MAD contains an invalid or reserved mgmt class, we will attempt to access method_table outside of its range. Add a check to ensure that mgmt class falls within the handled range. Found by code inspection. Signed-off-by: Sean Hefty Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c index b4d8672a3e4e..056389229ea7 100644 --- a/drivers/infiniband/core/mad.c +++ b/drivers/infiniband/core/mad.c @@ -1596,6 +1596,9 @@ find_mad_agent(struct ib_mad_port_private *port_priv, mad->mad_hdr.class_version].class; if (!class) goto out; + if (convert_mgmt_class(mad->mad_hdr.mgmt_class) >= + IB_MGMT_MAX_METHODS) + goto out; method = class->method_table[convert_mgmt_class( mad->mad_hdr.mgmt_class)]; if (method)