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iov_iter_fault_in_readable() should do nothing in xarray case

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commit 0e8f0d67401589a141950856902c7d0ec8d9c985 upstream.

... and actually should just check it's given an iovec-backed iterator
in the first place.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Al Viro 2021-06-02 14:48:21 -04:00 committed by Greg Kroah-Hartman
parent 1c8520e466
commit 1ff545051f
1 changed files with 1 additions and 1 deletions
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2
lib/iov_iter.c
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@ -417,7 +417,7 @@ int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes)
int err; int err;
struct iovec v; struct iovec v;
if (!(i->type & (ITER_BVEC|ITER_KVEC))) { if (iter_is_iovec(i)) {
iterate_iovec(i, bytes, v, iov, skip, ({ iterate_iovec(i, bytes, v, iov, skip, ({
err = fault_in_pages_readable(v.iov_base, v.iov_len); err = fault_in_pages_readable(v.iov_base, v.iov_len);
if (unlikely(err)) if (unlikely(err))