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Date: Thu, 8 Feb 2018 11:21:40 +0800 From: Jason Wang <jasowang@...hat.com> To: mst@...hat.com Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, Jason Wang <jasowang@...hat.com> Subject: [PATCH net V2 1/2] ptr_ring: try vmalloc() when kmalloc() fails This patch switch to use kvmalloc_array() for using a vmalloc() fallback to help in case kmalloc() fails. Reported-by: syzbot+e4d4f9ddd4295539735d@...kaller.appspotmail.com Fixes: 2e0ab8ca83c12 ("ptr_ring: array based FIFO for pointers") Signed-off-by: Jason Wang <jasowang@...hat.com> --- include/linux/ptr_ring.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/ptr_ring.h b/include/linux/ptr_ring.h index 1883d61..9c3b748 100644 --- a/include/linux/ptr_ring.h +++ b/include/linux/ptr_ring.h @@ -466,7 +466,7 @@ static inline int ptr_ring_consume_batched_bh(struct ptr_ring *r, static inline void **__ptr_ring_init_queue_alloc(unsigned int size, gfp_t gfp) { - return kcalloc(size, sizeof(void *), gfp); + return kvmalloc_array(size, sizeof(void *), gfp | __GFP_ZERO); } static inline void __ptr_ring_set_size(struct ptr_ring *r, int size) -- 2.7.4
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