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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>
This commit is contained in:
Al Viro 2015-03-31 11:43:52 -04:00
parent 23602adfee
commit 08397acdd0
1 changed files with 1 additions and 2 deletions
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3
fs/aio.c
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@ -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);
}