3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Alexander Potapenko <[email protected]> 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: [email protected] Cc: [email protected] Signed-off-by: Alexander Potapenko <[email protected]> Acked-by: Douglas Gilbert <[email protected]> Reviewed-by: Johannes Thumshirn <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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;
