Messages in this thread | | | Date | Wed, 27 Oct 2021 09:31:25 +0200 | Subject | Re: [syzbot] KASAN: slab-out-of-bounds Read in copy_data | From | Laurent Vivier <> |
| |
On 27/10/2021 09:20, Michael S. Tsirkin wrote: > On Wed, Oct 27, 2021 at 09:08:04AM +0200, Laurent Vivier wrote: >> On 27/10/2021 00:34, Eric Dumazet wrote: >>> >>> >>> On 10/26/21 9:39 AM, syzbot wrote: >>>> Hello, >>>> >>>> syzbot found the following issue on: >>>> >>>> HEAD commit: 9ae1fbdeabd3 Add linux-next specific files for 20211025 >>>> git tree: linux-next >>>> console output: https://syzkaller.appspot.com/x/log.txt?x=1331363cb00000 >>>> kernel config: https://syzkaller.appspot.com/x/.config?x=aeb17e42bc109064 >>>> dashboard link: https://syzkaller.appspot.com/bug?extid=b86736b5935e0d25b446 >>>> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 >>>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=116ce954b00000 >>>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132fcf62b00000 >>>> >>>> The issue was bisected to: >>>> >>>> commit 22849b5ea5952d853547cc5e0651f34a246b2a4f >>>> Author: Leon Romanovsky <leonro@nvidia.com> >>>> Date: Thu Oct 21 14:16:14 2021 +0000 >>>> >>>> devlink: Remove not-executed trap policer notifications >>> >>> More likely this came with >>> >>> caaf2874ba27b92bca6f0298bf88bad94067ec37 hwrng: virtio - don't waste entropy >>> >> >> I'm going to have a look. >> >> Thanks, >> Laurent > > How bad is it if we just drop this and waste some bytes of entropy? >
I don't think it's bad at all. In most of the cases we should use the full buffer.
So, you can drop, I will re-submit them later with a fix.
Thanks, Laurent
| |