On 26/10/2021 18:39, 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 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137d8bfcb00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=10fd8bfcb00000 console output: https://syzkaller.appspot.com/x/log.txt?x=177d8bfcb00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b86736b5935e0d25b446@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 22849b5ea595 ("devlink: Remove not-executed trap policer notifications") ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline] BUG: KASAN: slab-out-of-bounds in copy_data+0xf3/0x2e0 drivers/char/hw_random/virtio-rng.c:68 Read of size 64 at addr ffff88801a7a1580 by task syz-executor989/6542
I'm not able to reproduce the problem with next-20211026 and the C reproducer. And reviewing the code in copy_data() I don't see any issue. Is it possible to know what it the VM configuration used to test it? Thanks, Laurent
