3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexander Potapenko <gli...@google.com>
commit a45b599ad808c3c982fdcdc12b0b8611c2f92824 upstream.
This shall help avoid copying uninitialized memory to the userspace when
calling ioctl(fd, SG_IO) with an empty command.
Reported-by: syzbot+7d26fc1eea198488d...@syzkaller.appspotmail.com
Cc: sta...@vger.kernel.org
Signed-off-by: Alexander Potapenko <gli...@google.com>
Acked-by: Douglas Gilbert <dgilb...@interlog.com>
Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/scsi/sg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1950,7 +1950,7 @@ retry:
num = (rem_sz > scatter_elem_sz_prev) ?
scatter_elem_sz_prev : rem_sz;
- schp->pages[k] = alloc_pages(gfp_mask, order);
+ schp->pages[k] = alloc_pages(gfp_mask | __GFP_ZERO, order);
if (!schp->pages[k])
goto out;
