Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.12 81/83] aio: clean up aio ring in the fail path | Date | Fri, 6 Dec 2013 13:52:11 -0800 |
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3.12-stable review patch. If anyone has any objections, please let me know.
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From: Gu Zheng <guz.fnst@cn.fujitsu.com>
commit d1b9432712a25eeb06114fb4b587133525a47de5 upstream.
Clean up the aio ring file in the fail path of aio_setup_ring and ioctx_alloc. And maybe it can fix the GPF issue reported by Dave Jones: https://lkml.org/lkml/2013/11/25/898
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/aio.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/fs/aio.c +++ b/fs/aio.c @@ -367,8 +367,10 @@ static int aio_setup_ring(struct kioctx if (nr_pages > AIO_RING_PAGES) { ctx->ring_pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL); - if (!ctx->ring_pages) + if (!ctx->ring_pages) { + put_aio_ring_file(ctx); return -ENOMEM; + } } ctx->mmap_size = nr_pages * PAGE_SIZE; @@ -645,7 +647,7 @@ static struct kioctx *ioctx_alloc(unsign aio_nr + nr_events < aio_nr) { spin_unlock(&aio_nr_lock); err = -EAGAIN; - goto err; + goto err_ctx; } aio_nr += ctx->max_reqs; spin_unlock(&aio_nr_lock); @@ -662,6 +664,8 @@ static struct kioctx *ioctx_alloc(unsign err_cleanup: aio_nr_sub(ctx->max_reqs); +err_ctx: + aio_free_ring(ctx); err: free_percpu(ctx->cpu); free_percpu(ctx->reqs.pcpu_count);
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