From ddb8c45ba15149ebd41d7586261c05f7ca37f9a1 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Tue, 19 Nov 2013 17:33:03 -0500 Subject: [PATCH] aio: nullify aio->ring_pages after freeing it 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 Signed-off-by: Benjamin LaHaise --- fs/aio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/aio.c b/fs/aio.c index 6313533..ad460d7 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -196,8 +196,10 @@ static void aio_free_ring(struct kioctx *ctx) 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) -- 2.7.4