This is a note to let you know that I've just added the patch titled
aio: fix kioctx leak introduced by "aio: Fix a trinity splat"
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
aio-fix-kioctx-leak-introduced-by-aio-fix-a-trinity-splat.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1881686f842065d2f92ec9c6424830ffc17d23b0 Mon Sep 17 00:00:00 2001
From: Benjamin LaHaise <[email protected]>
Date: Sat, 21 Dec 2013 15:49:28 -0500
Subject: aio: fix kioctx leak introduced by "aio: Fix a trinity splat"
From: Benjamin LaHaise <[email protected]>
commit 1881686f842065d2f92ec9c6424830ffc17d23b0 upstream.
e34ecee2ae791df674dfb466ce40692ca6218e43 reworked the percpu reference
counting to correct a bug trinity found. Unfortunately, the change lead
to kioctxes being leaked because there was no final reference count to
put. Add that reference count back in to fix things.
Signed-off-by: Benjamin LaHaise <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/aio.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -652,7 +652,8 @@ static struct kioctx *ioctx_alloc(unsign
aio_nr += ctx->max_reqs;
spin_unlock(&aio_nr_lock);
- percpu_ref_get(&ctx->users); /* io_setup() will drop this ref */
+ percpu_ref_get(&ctx->users); /* io_setup() will drop this ref */
+ percpu_ref_get(&ctx->reqs); /* free_ioctx_users() will drop this */
err = ioctx_add_table(ctx, mm);
if (err)
Patches currently in stable-queue which might be from [email protected] are
queue-3.12/aio-fix-kioctx-leak-introduced-by-aio-fix-a-trinity-splat.patch
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