linux-kernel - Re: [PATCH bpf] bpf: verifier: support BPF_LOAD_ACQ in insn_def

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Message-ID: <mb61pbjrlhfyf.fsf@kernel.org>
Date: Wed, 21 May 2025 20:22:16 +0000
From: Puranjay Mohan <puranjay@...nel.org>
To: Eduard Zingerman <eddyz87@...il.com>, Alexei Starovoitov
 <alexei.starovoitov@...il.com>
Cc: Peilin Ye <yepeilin@...gle.com>, Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, John Fastabend
 <john.fastabend@...il.com>, Andrii Nakryiko <andrii@...nel.org>, Martin
 KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, Yonghong
 Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, "Stanislav
 Fomichev" <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, Jiri Olsa
 <jolsa@...nel.org>, bpf <bpf@...r.kernel.org>, LKML
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf] bpf: verifier: support BPF_LOAD_ACQ in
 insn_def_regno()

Eduard Zingerman <eddyz87@...il.com> writes:

> Alexei Starovoitov <alexei.starovoitov@...il.com> writes:
>
> [...]
>
>> I suspect it was already fixed by commit
>> fce7bd8e385a ("bpf/verifier: Handle BPF_LOAD_ACQ instructions in
>> insn_def_regno()")
>
> I see, series [1] is not a part of the tag [2] tested by syzbot, thank you.
>
> [1] "bpf, riscv64: Support load-acquire and store-release instructions"
>     https://lore.kernel.org/all/cover.1746588351.git.yepeilin@google.com/
> [2] 172a9d94339c ("Merge tag '6.15-rc6-smb3-client-fixes'")


Yes, sorry for missing this. The fix is in bpf-next but syzkaller was
testing mainline.

Thanks,
Puranjay