netdev - Re: [PATCH bpf] bpf: fix 32-bit divide by zero

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Message-ID: <58973cfb-b157-d63b-9e43-ccdf42f7208b@iogearbox.net>
Date:   Sun, 14 Jan 2018 23:06:18 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Alexei Starovoitov <ast@...nel.org>, davem@...emloft.net
Cc:     edumazet@...gle.com, netdev@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH bpf] bpf: fix 32-bit divide by zero

On 01/13/2018 03:59 AM, Alexei Starovoitov wrote:
> due to some JITs doing if (src_reg == 0) check in 64-bit mode
> for div/mod opreations mask upper 32-bits of src register
> before doing the check
> 
> Fixes: 622582786c9e ("net: filter: x86: internal BPF JIT")
> Fixes: 7a12b5031c6b ("sparc64: Add eBPF JIT.")
> Reported-by: syzbot+48340bb518e88849e2e3@...kaller.appspotmail.com
> Signed-off-by: Alexei Starovoitov <ast@...nel.org>

Applied to bpf as well, thanks Alexei!