All of
 help / color / mirror / Atom feed
From: "tip-bot for Joel Fernandes (Google)" <>
Subject: [tip:core/debugobjects] debugobjects: Make stack check warning more informative
Date: Mon, 30 Jul 2018 12:39:52 -0700	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Commit-ID:  fc91a3c4c27acdca0bc13af6fbb68c35cfd519f2
Author:     Joel Fernandes (Google) <>
AuthorDate: Mon, 23 Jul 2018 14:25:31 -0700
Committer:  Thomas Gleixner <>
CommitDate: Mon, 30 Jul 2018 21:36:37 +0200

debugobjects: Make stack check warning more informative

While debugging an issue debugobject tracking warned about an annotation
issue of an object on stack. It turned out that the issue was due to the
object in concern being on a different stack which was due to another

Thomas suggested to print the pointers and the location of the stack for
the currently running task. This helped to figure out that the object was
on the wrong stack.

As this is general useful information for debugging similar issues, make
the error message more informative by printing the pointers.

[ tglx: Massaged changelog ]

Signed-off-by: Joel Fernandes (Google) <>
Signed-off-by: Thomas Gleixner <>
Acked-by: Waiman Long <>
Acked-by: Yang Shi <>
Cc: Arnd Bergmann <>

 lib/debugobjects.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 994be4805cec..24c1df0d7466 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -360,9 +360,12 @@ static void debug_object_is_on_stack(void *addr, int onstack)
 	if (is_on_stack)
-		pr_warn("object is on stack, but not annotated\n");
+		pr_warn("object %p is on stack %p, but NOT annotated.\n", addr,
+			 task_stack_page(current));
-		pr_warn("object is not on stack, but annotated\n");
+		pr_warn("object %p is NOT on stack %p, but annotated.\n", addr,
+			 task_stack_page(current));

      parent reply	other threads:[~2018-07-30 19:40 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-23 21:25 [PATCH RFC] " Joel Fernandes
2018-07-23 21:54 ` Yang Shi
2018-07-24  0:33 ` Waiman Long
2018-07-30 19:39 ` tip-bot for Joel Fernandes (Google) [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \ \ \
    --subject='Re: [tip:core/debugobjects] debugobjects: Make stack check warning more informative' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.