| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.12 80/83] aio: nullify aio->ring_pages after freeing it | Date | Fri, 6 Dec 2013 13:52:10 -0800 |
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3.12-stable review patch. If anyone has any objections, please let me know.
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From: Sasha Levin <sasha.levin@oracle.com>
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@oracle.com> Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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)
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