Commit 08397acd authored Mar 31, 2015 by Al Viro

ioctx_alloc(): remove pointless check



Way, way back kiocb used to be picked from arrays, so ioctx_alloc()
checked for multiplication overflow when calculating the size of
such array.  By the time fs/aio.c went into the tree (in 2002) they
were already allocated one-by-one by kmem_cache_alloc(), so that
check had already become pointless.  Let's bury it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 23602adf

fs/aio.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -688,8 +688,7 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
		nr_events *= 2;

		/* Prevent overflows */
		if ((nr_events > (0x10000000U / sizeof(struct io_event))) \|\|
		(nr_events > (0x10000000U / sizeof(struct kiocb)))) {
		if (nr_events > (0x10000000U / sizeof(struct io_event))) {
		pr_debug("ENOMEM: nr_events too high\n");
		return ERR_PTR(-EINVAL);
		}