3.16.58-rc1 review patch. If anyone has any objections, please let me know.
From: Alexander Potapenko glider@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+7d26fc1eea198488deab@syzkaller.appspotmail.com Signed-off-by: Alexander Potapenko glider@google.com Acked-by: Douglas Gilbert dgilbert@interlog.com Reviewed-by: Johannes Thumshirn jthumshirn@suse.de Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Ben Hutchings ben@decadent.org.uk
drivers/scsi/sg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1825,7 +1825,7 @@ 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);
Can't find the corresponding bug.