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aio: nullify aio->ring_pages after freeing it

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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>
This commit is contained in:
Sasha Levin 2013-11-19 17:33:03 -05:00 committed by Benjamin LaHaise
parent d558023207
commit ddb8c45ba1
1 changed files with 3 additions and 1 deletions
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4
fs/aio.c
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@ -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)