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IB/umad: fix RMPP handling 

ib_umad_write in user_mad.c is looking at rmpp_hdr field in MAD before
checking that the MAD actually has the RMPP header.  So for a MAD
without RMPP header it looks like we are actually checking a bit
inside M_Key, or something.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Michael S. Tsirkin 2005-11-28 13:07:20 -08:00 committed by Roland Dreier
parent 187a25863f
commit bf6d9e23a3
1 changed files with 22 additions and 19 deletions
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37
drivers/infiniband/core/user_mad.c
View File

@ -310,7 +310,7 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
u8 method;
__be64 *tid;
int ret, length, hdr_len, copy_offset;
int rmpp_active = 0;
int rmpp_active, has_rmpp_header;
if (count < sizeof (struct ib_user_mad) + IB_MGMT_RMPP_HDR)
return -EINVAL;
@ -360,28 +360,31 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
}
rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data;
if (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE) {
/* RMPP active */
if (!agent->rmpp_version) {
ret = -EINVAL;
goto err_ah;
}
/* Validate that the management class can support RMPP */
if (rmpp_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_ADM) {
hdr_len = IB_MGMT_SA_HDR;
} else if ((rmpp_mad->mad_hdr.mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
(rmpp_mad->mad_hdr.mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) {
hdr_len = IB_MGMT_VENDOR_HDR;
} else {
ret = -EINVAL;
goto err_ah;
}
rmpp_active = 1;
copy_offset = IB_MGMT_RMPP_HDR;
has_rmpp_header = 1;
} else if (rmpp_mad->mad_hdr.mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START &&
rmpp_mad->mad_hdr.mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END) {
hdr_len = IB_MGMT_VENDOR_HDR;
copy_offset = IB_MGMT_RMPP_HDR;
has_rmpp_header = 1;
} else {
hdr_len = IB_MGMT_MAD_HDR;
copy_offset = IB_MGMT_MAD_HDR;
has_rmpp_header = 0;
}
if (has_rmpp_header)
rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
IB_MGMT_RMPP_FLAG_ACTIVE;
else
rmpp_active = 0;
/* Validate that the management class can support RMPP */
if (rmpp_active && !agent->rmpp_version) {
ret = -EINVAL;
goto err_ah;
}
packet->msg = ib_create_send_mad(agent,