From: Dave Jiang <dave.jiang@intel.com>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org
Subject: [PATCH] uio: fix is_source param for check_copy_size() in copy_to_iter_mcsafe()
Date: Wed, 05 Sep 2018 13:31:40 -0700 [thread overview]
Message-ID: <153617950046.33664.13445188581267552601.stgit@djiang5-desk3.ch.intel.com> (raw)
copy_to_iter_mcsafe() is passing in the is_source parameter as "false"
to check_copy_size(). This is different than what copy_to_iter() does.
Also, the addr parameter passed to check_copy_size() is the source so
therefore we should be passing in "true" instead.
Fixes: 8780356ef630 ("x86/asm/memcpy_mcsafe: Define copy_to_iter_mcsafe()")
Reported-by: Fan Du <fan.du@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
---
include/linux/uio.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 409c845d4cd3..422b1c01ee0d 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -172,7 +172,7 @@ size_t copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i)
static __always_inline __must_check
size_t copy_to_iter_mcsafe(void *addr, size_t bytes, struct iov_iter *i)
{
- if (unlikely(!check_copy_size(addr, bytes, false)))
+ if (unlikely(!check_copy_size(addr, bytes, true)))
return 0;
else
return _copy_to_iter_mcsafe(addr, bytes, i);
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next reply other threads:[~2018-09-05 20:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-05 20:31 Dave Jiang [this message]
2018-09-06 15:45 ` Dave Jiang
2018-09-12 7:48 ` Greg KH
2018-09-12 21:51 ` Dan Williams
2018-09-12 21:57 ` Greg KH
2018-09-12 22:02 ` Dan Williams
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