[PATCH 1/3 net-next] lib: objagg: Fix an error code in objagg_hints_get()

[PATCH 1/3 net-next] lib: objagg: Fix an error code in objagg_hints_get()

[Dan Carpenter]

We need to set the error code on this path otherwise we return
ERR_PTR(0) which would result in a NULL dereference in the caller.

Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 lib/objagg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/objagg.c b/lib/objagg.c
index 781f41c3c47d..d552ec9c60ed 100644
--- a/lib/objagg.c
+++ b/lib/objagg.c
@@ -968,8 +968,10 @@ struct objagg_hints *objagg_hints_get(struct objagg *objagg,
 	if (err)
 		goto err_fillup_hints;
 
-	if (WARN_ON(objagg_hints->node_count != objagg->obj_count))
+	if (WARN_ON(objagg_hints->node_count != objagg->obj_count)) {
+		err = -EINVAL;
 		goto err_node_count_check;
+	}
 
 	return objagg_hints;
 
-- 
2.17.1

[PATCH 2/3 net-next] test_objagg: Test the correct variable

[Dan Carpenter]

There is a typo here.  We intended to check "objagg2" but we instead
test "objagg" which is not an error pointer.

Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 lib/test_objagg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/test_objagg.c b/lib/test_objagg.c
index 3744573b6365..3dd45777b13c 100644
--- a/lib/test_objagg.c
+++ b/lib/test_objagg.c
@@ -952,8 +952,8 @@ static int test_hints_case(const struct hints_case *hints_case)
 	}
 
 	objagg2 = objagg_create(&delta_ops, hints, &world2);
-	if (IS_ERR(objagg))
-		return PTR_ERR(objagg);
+	if (IS_ERR(objagg2))
+		return PTR_ERR(objagg2);
 
 	for (i = 0; i < hints_case->key_ids_count; i++) {
 		objagg_obj = world_obj_get(&world2, objagg2,
-- 
2.17.1

[PATCH 3/3 net-next] test_objagg: Uninitialized variable in error handling

[Dan Carpenter]

We need to set the error message on this path otherwise some of the
callers, such as test_hints_case(), print from an uninitialized pointer.

We had a similar bug earlier and set "errmsg" to NULL in the caller,
test_delta_action_item().  That code is no longer required so I have
removed it.

Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 lib/test_objagg.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/test_objagg.c b/lib/test_objagg.c
index 3dd45777b13c..72c1abfa154d 100644
--- a/lib/test_objagg.c
+++ b/lib/test_objagg.c
@@ -745,8 +745,10 @@ static int check_expect_stats(struct objagg *objagg,
 	int err;
 
 	stats = objagg_stats_get(objagg);
-	if (IS_ERR(stats))
+	if (IS_ERR(stats)) {
+		*errmsg = "objagg_stats_get() failed.";
 		return PTR_ERR(stats);
+	}
 	err = __check_expect_stats(stats, expect_stats, errmsg);
 	objagg_stats_put(stats);
 	return err;
@@ -786,7 +788,6 @@ static int test_delta_action_item(struct world *world,
 	if (err)
 		goto errout;
 
-	errmsg = NULL;
 	err = check_expect_stats(objagg, &action_item->expect_stats, &errmsg);
 	if (err) {
 		pr_err("Key %u: Stats: %s\n", action_item->key_id, errmsg);
-- 
2.17.1

Re: [PATCH 1/3 net-next] lib: objagg: Fix an error code in objagg_hints_get()

[Jiri Pirko]

Wed, Feb 13, 2019 at 09:56:50AM CET, dan.carpenter@oracle.com wrote:
>We need to set the error code on this path otherwise we return
>ERR_PTR(0) which would result in a NULL dereference in the caller.
>
>Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
>Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

I have the same patch in my queue.

Acked-by: Jiri Pirko <jiri@mellanox.com>

Re: [PATCH 2/3 net-next] test_objagg: Test the correct variable

[Jiri Pirko]

Wed, Feb 13, 2019 at 09:58:20AM CET, dan.carpenter@oracle.com wrote:
>There is a typo here.  We intended to check "objagg2" but we instead
>test "objagg" which is not an error pointer.
>
>Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
>Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Acked-by: Jiri Pirko <jiri@mellanox.com>

Thanks.

Re: [PATCH 3/3 net-next] test_objagg: Uninitialized variable in error handling

[Jiri Pirko]

Wed, Feb 13, 2019 at 09:59:31AM CET, dan.carpenter@oracle.com wrote:
>We need to set the error message on this path otherwise some of the
>callers, such as test_hints_case(), print from an uninitialized pointer.
>
>We had a similar bug earlier and set "errmsg" to NULL in the caller,
>test_delta_action_item().  That code is no longer required so I have
>removed it.
>
>Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
>Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Acked-by: Jiri Pirko <jiri@mellanox.com>

Re: [PATCH 1/3 net-next] lib: objagg: Fix an error code in objagg_hints_get()

[David Miller]

From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 13 Feb 2019 11:56:50 +0300

> We need to set the error code on this path otherwise we return
> ERR_PTR(0) which would result in a NULL dereference in the caller.
> 
> Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Applied.

Re: [PATCH 2/3 net-next] test_objagg: Test the correct variable

[David Miller]

From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 13 Feb 2019 11:58:20 +0300

> There is a typo here.  We intended to check "objagg2" but we instead
> test "objagg" which is not an error pointer.
> 
> Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Applied.

Re: [PATCH 3/3 net-next] test_objagg: Uninitialized variable in error handling

[David Miller]

From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 13 Feb 2019 11:59:31 +0300

> We need to set the error message on this path otherwise some of the
> callers, such as test_hints_case(), print from an uninitialized pointer.
> 
> We had a similar bug earlier and set "errmsg" to NULL in the caller,
> test_delta_action_item().  That code is no longer required so I have
> removed it.
> 
> Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Applied.