The patch titled
drivers/char/vt.c: use memdup_user
has been added to the -mm tree. Its filename is
drivers-char-vtc-use-memdup_user.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: drivers/char/vt.c: use memdup_user
From: Julia Lawall <julia@xxxxxxx>
Use memdup_user when user data is immediately copied into the
allocated region.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@
- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+ to = memdup_user(from,size);
if (
- to==NULL
+ IS_ERR(to)
|| ...) {
<+... when != goto l1;
- -ENOMEM
+ PTR_ERR(to)
...+>
}
- if (copy_from_user(to, from, size) != 0) {
- <+... when != goto l2;
- -EFAULT
- ...+>
- }
// </smpl>
Signed-off-by: Julia Lawall <julia@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/vt.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff -puN drivers/char/vt.c~drivers-char-vtc-use-memdup_user drivers/char/vt.c
--- a/drivers/char/vt.c~drivers-char-vtc-use-memdup_user
+++ a/drivers/char/vt.c
@@ -3967,13 +3967,9 @@ static int con_font_set(struct vc_data *
font.charcount = op->charcount;
font.height = op->height;
font.width = op->width;
- font.data = kmalloc(size, GFP_KERNEL);
- if (!font.data)
- return -ENOMEM;
- if (copy_from_user(font.data, op->data, size)) {
- kfree(font.data);
- return -EFAULT;
- }
+ font.data = memdup_user(op->data, size);
+ if (IS_ERR(font.data))
+ return PTR_ERR(font.data);
acquire_console_sem();
if (vc->vc_sw->con_font_set)
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
_
Patches currently in -mm which might be from julia@xxxxxxx are
origin.patch
linux-next.patch
drivers-scsi-aacraid-eliminate-use-after-free.patch
arch-x86-pci-use-kasprintf.patch
drivers-scsi-libsas-use-sam_good.patch
drivers-scsi-remove-unnecessary-null-test.patch
drivers-message-move-dereference-after-null-test.patch
drivers-scsi-correct-the-size-argument-to-kmalloc.patch
drivers-char-ppdevc-use-kasprintf.patch
net-can-use-memdup_user.patch
drivers-net-use-memdup_user.patch
fs-btrfs-use-memdup_user.patch
drivers-video-via-use-memdup_user.patch
mm-use-memdup_user.patch
drivers-net-cxgb3-use-memdup_user.patch
drivers-net-wan-use-memdup_user.patch
drivers-block-use-memdup_user.patch
drivers-media-use-memdup_user.patch
drivers-infiniband-core-use-memdup_user.patch
drivers-i2c-use-memdup_user.patch
drivers-ieee1394-use-memdup_user.patch
fs-autofs4-use-memdup_user.patch
drivers-scsi-use-memdup_user.patch
drivers-char-applicomc-use-memdup_user.patch
drivers-char-vtc-use-memdup_user.patch
drivers-message-i2o-i2o_configc-use-memdup_user.patch
drivers-telephony-ixjc-use-memdup_user.patch
drivers-s390-net-use-memdup_user.patch
drivers-ide-use-memdup_user.patch
net-dccp-use-memdup_user.patch
drivers-net-wireless-prism54-use-memdup_user.patch
drivers-usb-gadget-use-memdup_user.patch
drivers-isdn-use-memdup_user.patch
drivers-staging-dream-camera-use-memdup_user.patch
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