From: Oleg Nesterov <oleg@redhat.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
bpf@vger.kernel.org, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Stanislav Fomichev <sdf@fomichev.me>, Hao Luo <haoluo@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org
Subject: Re: [PATCHv4 02/14] uprobe: Add support for session consumer
Date: Tue, 17 Sep 2024 14:22:05 +0200 [thread overview]
Message-ID: <20240917122204.GB7752@redhat.com> (raw)
In-Reply-To: <20240917085024.765883-3-jolsa@kernel.org>
On 09/17, Jiri Olsa wrote:
>
> static void handler_chain(struct uprobe *uprobe, struct pt_regs *regs)
...
> + if (!ignore && !ZERO_OR_NULL_PTR(ri)) {
> + /*
> + * The push_idx value has the final number of return consumers,
> + * and ri->consumers_cnt has number of allocated consumers.
> + */
> + ri->consumers_cnt = push_idx;
> + prepare_uretprobe(uprobe, regs, ri);
> + }
This looks wrong. ri is not kfreed if ignore == true.
But see my previous email, if we change this code as I tried to suggest
the problem goes away and handler_chain() doesn't need "bool ignore".
Oleg.
next prev parent reply other threads:[~2024-09-17 12:22 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-17 8:50 [PATCHv4 00/14] uprobe, bpf: Add session support Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 01/14] uprobe: Add data pointer to consumer handlers Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 02/14] uprobe: Add support for session consumer Jiri Olsa
2024-09-17 12:03 ` Oleg Nesterov
2024-09-17 12:51 ` Jiri Olsa
2024-09-22 15:27 ` Oleg Nesterov
2024-09-23 8:05 ` Jiri Olsa
2024-09-23 10:05 ` Oleg Nesterov
2024-09-23 11:02 ` Jiri Olsa
2024-09-23 12:13 ` Oleg Nesterov
2024-09-17 12:22 ` Oleg Nesterov [this message]
2024-09-17 8:50 ` [PATCHv4 03/14] bpf: Add support for uprobe multi session attach Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 04/14] bpf: Add support for uprobe multi session context Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 05/14] bpf: Allow return values 0 and 1 for uprobe/kprobe session Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 06/14] libbpf: Fix uretprobe.multi.s programs auto attachment Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 07/14] libbpf: Add support for uprobe multi session attach Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 08/14] selftests/bpf: Add uprobe session test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 09/14] selftests/bpf: Add uprobe session cookie test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 10/14] selftests/bpf: Add uprobe session recursive test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 11/14] selftests/bpf: Add uprobe session verifier test for return value Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 12/14] selftests/bpf: Add kprobe " Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 13/14] selftests/bpf: Add uprobe session single consumer test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 14/14] selftests/bpf: Add consumers stress test on single uprobe Jiri Olsa
2024-09-23 8:34 ` [PATCHv4 00/14] uprobe, bpf: Add session support patchwork-bot+netdevbpf
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