ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE
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Web: https://git.kernel.org/torvalds/c/6e6e41c3112276288ccaf80c70916779b84bb276 Commit: 6e6e41c3112276288ccaf80c70916779b84bb276 Parent: 909ebd5840d158670eb88b2f73e9d38a894f28e2 Refname: refs/heads/master Author: Jason Wang <[email protected]> AuthorDate: Fri Feb 9 17:45:49 2018 +0800 Committer: David S. Miller <[email protected]> CommitDate: Fri Feb 9 14:28:57 2018 -0500 ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE To avoid slab to warn about exceeded size, fail early if queue occupies more than KMALLOC_MAX_SIZE. Reported-by: [email protected] Fixes: 2e0ab8ca83c12 ("ptr_ring: array based FIFO for pointers") Signed-off-by: Jason Wang <[email protected]> Acked-by: Michael S. Tsirkin <[email protected]> Signed-off-by: David S. Miller <[email protected]> --- include/linux/ptr_ring.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/ptr_ring.h b/include/linux/ptr_ring.h index 1883d6137e9b..6051a5fe6913 100644 --- a/include/linux/ptr_ring.h +++ b/include/linux/ptr_ring.h @@ -466,6 +466,8 @@ 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) { + if (size * sizeof(void *) > KMALLOC_MAX_SIZE) + return NULL; return kcalloc(size, sizeof(void *), gfp); } -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html