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[for,v3.13,7/7] IB/uverbs: set error code when fail to consume all flow_spec items

Message ID 7e2fc009c0c2fcd2c616d02b735cf02f83bad5c6.1385501822.git.ydroneaud@opteya.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Yann Droneaud Nov. 26, 2013, 10:02 p.m. UTC
If the flow_spec items parsed count does not match the number
of items declared in the flow_attr command, or if not all
bytes are used for flow_spec items (eg. trailing garbage),
a log message is reported and the function leave through
the error path. Unfortunately the error code is currently
not set.

This patch set error code to -EINVAL in such cases, so
that the error is reported to userspace instead of silently
fail.

Link: http://marc.info/?i=cover.1385501822.git.ydroneaud@opteya.com
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
---
 drivers/infiniband/core/uverbs_cmd.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index dd1c5b6ab019..5976d885f408 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -2738,6 +2738,7 @@  int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
 	if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
 		pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
 			i, cmd.flow_attr.size);
+		err = -EINVAL;
 		goto err_free;
 	}
 	flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);