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| author |   Sasha Levin <sasha.levin@oracle.com> | 2013-11-19 17:33:03 -0500 |
|---|---|---|
| committer |   Benjamin LaHaise <bcrl@kvack.org> | 2013-11-19 17:40:48 -0500 |
| commit | ddb8c45ba15149ebd41d7586261c05f7ca37f9a1 (patch) | |
| tree | 2dace4cd25760745f94767308f8f846a702f828b /fs | |
| parent | aio: prevent double free in ioctx_alloc (diff) | |
| download | linux-dev-ddb8c45ba15149ebd41d7586261c05f7ca37f9a1.tar.xz linux-dev-ddb8c45ba15149ebd41d7586261c05f7ca37f9a1.zip | |
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 <sasha.levin@oracle.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/aio.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -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) |