linux-kernel - [PATCH] floppy: replace wrong kmalloc(GFP_USER) with GFP

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Message-Id: <20170104101931.10165-1-vbabka@suse.cz>
Date:   Wed,  4 Jan 2017 11:19:31 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <mawilcox@...uxonhyperv.com>
Subject: [PATCH] floppy: replace wrong kmalloc(GFP_USER) with GFP_KERNEL

The raw_cmd_copyin() function does a kmalloc() with GFP_USER, although the
allocated structure is obviously not mapped to userspace, just copied from/to.
In this case GFP_KERNEL is more appropriate, so let's use it, although in the
current implementation this does not manifest as any error.

Reported-by: Matthew Wilcox <mawilcox@...uxonhyperv.com>
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
 drivers/block/floppy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index e3d8e4ced4a2..7f3e68acd787 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3119,7 +3119,7 @@ static int raw_cmd_copyin(int cmd, void __user *param,
 	*rcmd = NULL;
 
 loop:
-	ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
+	ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL);
 	if (!ptr)
 		return -ENOMEM;
 	*rcmd = ptr;
-- 
2.11.0