Re: [syzbot] KASAN: slab-out-of-bounds Read in copy_data

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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@xxxxxxxxxx>
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





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