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Date: Sat, 17 Nov 2018 00:44:13 +0000 From: Y Song <ys114321@...il.com> To: Edward Cree <ecree@...arflare.com> Cc: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, netdev <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, syzkaller-bugs@...glegroups.com Subject: Re: [PATCH bpf] bpf: fix off-by-one error in adjust_subprog_starts On Fri, Nov 16, 2018 at 12:00 PM Edward Cree <ecree@...arflare.com> wrote: > > When patching in a new sequence for the first insn of a subprog, the start > of that subprog does not change (it's the first insn of the sequence), so > adjust_subprog_starts should check start <= off (rather than < off). > Also added a test to test_verifier.c (it's essentially the syz reproducer). > > Fixes: cc8b0b92a169 ("bpf: introduce function calls (function boundaries)") > Reported-by: syzbot+4fc427c7af994b0948be@...kaller.appspotmail.com > Signed-off-by: Edward Cree <ecree@...arflare.com> Acked-by: Yonghong Song <yhs@...com>
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