This is a note to let you know that I've just added the patch titled
aio: nullify aio->ring_pages after freeing it
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-nullify-aio-ring_pages-after-freeing-it.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 <stable@xxxxxxxxxxxxxxx> know about it.
>From ddb8c45ba15149ebd41d7586261c05f7ca37f9a1 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
Date: Tue, 19 Nov 2013 17:33:03 -0500
Subject: aio: nullify aio->ring_pages after freeing it
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
commit ddb8c45ba15149ebd41d7586261c05f7ca37f9a1 upstream.
After freeing ring_pages we leave it as is causing a dangling pointer. This
has already caused an issue so to help catching any issues in the future
NULL it out.
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Signed-off-by: Benjamin LaHaise <bcrl@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/aio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -251,8 +251,10 @@ static void aio_free_ring(struct kioctx
put_aio_ring_file(ctx);
- if (ctx->ring_pages && ctx->ring_pages != ctx->internal_pages)
+ if (ctx->ring_pages && ctx->ring_pages != ctx->internal_pages) {
kfree(ctx->ring_pages);
+ ctx->ring_pages = NULL;
+ }
}
static int aio_ring_mmap(struct file *file, struct vm_area_struct *vma)
Patches currently in stable-queue which might be from sasha.levin@xxxxxxxxxx are
queue-3.12/aio-prevent-double-free-in-ioctx_alloc.patch
queue-3.12/aio-nullify-aio-ring_pages-after-freeing-it.patch
queue-3.12/video-kyro-fix-incorrect-sizes-when-copying-to-userspace.patch
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