Messages in this thread | | | Date | Fri, 18 Nov 2011 23:04:08 +0200 | Subject | Re: [PATCH] pipe: Fail cleanly when root tries F_SETPIPE_SZ with big size | From | Pekka Enberg <> |
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On Fri, Nov 18, 2011 at 10:04:34PM +0200, Sasha Levin wrote: >> + if (nr_pages * sizeof(struct pipe_buffer) > KMALLOC_MAX_SIZE) >> + return -ENOMEM;
On Fri, Nov 18, 2011 at 10:25 PM, Al Viro <viro@zeniv.linux.org.uk> wrote: > nr_pages is unsigned long, sizeof is greater than 1, KMALLOC_MAX_SIZE is > unsigned long... So write that check as KMALLOC_MAX_SIZE / sizeof > nr_pages
We could just use __GFP_NOWARN here and let kcalloc() deal with the overflow case. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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