From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit d8bad911e5e55e228d59c0606ff7e6b8131ca7bf ]
I'm not sure why the code assumes that only the first put_user() needs an access_ok() check. I have made all the put_user() and get_user() calls checked.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Cc: Philippe Ombredanne pombredanne@nexb.com Cc: Mathieu Malaterre malat@debian.org Cc: Peter Malone peter.malone@gmail.com, Signed-off-by: Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/video/fbdev/sbuslib.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/video/fbdev/sbuslib.c b/drivers/video/fbdev/sbuslib.c index 31c301d6be621..b425718925c01 100644 --- a/drivers/video/fbdev/sbuslib.c +++ b/drivers/video/fbdev/sbuslib.c @@ -105,11 +105,11 @@ int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, struct fbtype __user *f = (struct fbtype __user *) arg;
if (put_user(type, &f->fb_type) || - __put_user(info->var.yres, &f->fb_height) || - __put_user(info->var.xres, &f->fb_width) || - __put_user(fb_depth, &f->fb_depth) || - __put_user(0, &f->fb_cmsize) || - __put_user(fb_size, &f->fb_cmsize)) + put_user(info->var.yres, &f->fb_height) || + put_user(info->var.xres, &f->fb_width) || + put_user(fb_depth, &f->fb_depth) || + put_user(0, &f->fb_cmsize) || + put_user(fb_size, &f->fb_cmsize)) return -EFAULT; return 0; } @@ -124,10 +124,10 @@ int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, unsigned int index, count, i;
if (get_user(index, &c->index) || - __get_user(count, &c->count) || - __get_user(ured, &c->red) || - __get_user(ugreen, &c->green) || - __get_user(ublue, &c->blue)) + get_user(count, &c->count) || + get_user(ured, &c->red) || + get_user(ugreen, &c->green) || + get_user(ublue, &c->blue)) return -EFAULT;
cmap.len = 1; @@ -164,10 +164,10 @@ int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, u8 red, green, blue;
if (get_user(index, &c->index) || - __get_user(count, &c->count) || - __get_user(ured, &c->red) || - __get_user(ugreen, &c->green) || - __get_user(ublue, &c->blue)) + get_user(count, &c->count) || + get_user(ured, &c->red) || + get_user(ugreen, &c->green) || + get_user(ublue, &c->blue)) return -EFAULT;
if (index + count > cmap->len)