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scsi: be2iscsi: Add length check when parsing nlattrs

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[ Upstream commit ee0268f230 ]

beiscsi_iface_set_param() parses nlattr with nla_for_each_attr and assumes
every attributes can be viewed as struct iscsi_iface_param_info.

This is not true because there is no any nla_policy to validate the
attributes passed from the upper function iscsi_set_iface_params().

Add the nla_len check before accessing the nlattr data and return EINVAL if
the length check fails.

Fixes: 0e43895ec1 ("[SCSI] be2iscsi: adding functionality to change network settings using iscsiadm")
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Link: https://lore.kernel.org/r/20230723075938.3713864-1-linma@zju.edu.cn
Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lin Ma
2023-07-23 15:59:38 +08:00
committed by Greg Kroah-Hartman
parent 85b8c282d1
commit 1806edae97
1 changed files with 4 additions and 0 deletions
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4
drivers/scsi/be2iscsi/be_iscsi.c
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@@ -450,6 +450,10 @@ int beiscsi_iface_set_param(struct Scsi_Host *shost,
} }
nla_for_each_attr(attrib, data, dt_len, rm_len) { nla_for_each_attr(attrib, data, dt_len, rm_len) {
/* ignore nla_type as it is never used */
if (nla_len(attrib) < sizeof(*iface_param))
return -EINVAL;
iface_param = nla_data(attrib); iface_param = nla_data(attrib);
if (iface_param->param_type != ISCSI_NET_PARAM) if (iface_param->param_type != ISCSI_NET_PARAM)