Re: [syzbot] [bpf?] KASAN: stack-out-of-bounds Read in hash

[Hou Tao]

On 5/15/2024 11:29 PM, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 9330986c03006ab1d33d243b7cfe598a7a3c1baa
> Author: Joanne Koong <joannekoong@xxxxxx>
> Date:   Wed Oct 27 23:45:00 2021 +0000
>
>     bpf: Add bloom filter map implementation
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1543bd5c980000
> start commit:   443574b03387 riscv, bpf: Fix kfunc parameters incompatibil..
> git tree:       bpf
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1743bd5c980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1343bd5c980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440
> dashboard link: https://syzkaller.appspot.com/bug?extid=9459b5d7fab774cf182f
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13d86795180000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143eff76180000
>
> Reported-by: syzbot+9459b5d7fab774cf182f@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: 9330986c0300 ("bpf: Add bloom filter map implementation")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> .

#syz fix: bpf: Check bloom filter map value size