From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 659096FA7 for ; Sun, 17 Sep 2023 20:13:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9641AC433C8; Sun, 17 Sep 2023 20:13:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694981623; bh=tlLaZAUtr3rDJaFWCCfrTb2VpYF3g2vZLnsF7kgbKsE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QRctihYqr833mp61MXx5JOhO9IE+phyU7ydksFVE2faUjvVyTK2Pd/ejnekXyP60z BVMzLDAh5dUUBXwFfnyo5hRLMstlZ5fp8LK+Pzo3RQQe/tOaUOmYXlz2fjv623F5EG pCIwiwAshnnAH2yylDdCtI0uIDWThW8xZJiXlxnE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yafang Shao , Yonghong Song , Jiri Olsa , Alexei Starovoitov , Sasha Levin Subject: [PATCH 5.15 080/511] bpf: Clear the probe_addr for uprobe Date: Sun, 17 Sep 2023 21:08:27 +0200 Message-ID: <20230917191115.805147581@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917191113.831992765@linuxfoundation.org> References: <20230917191113.831992765@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yafang Shao [ Upstream commit 5125e757e62f6c1d5478db4c2b61a744060ddf3f ] To avoid returning uninitialized or random values when querying the file descriptor (fd) and accessing probe_addr, it is necessary to clear the variable prior to its use. Fixes: 41bdc4b40ed6 ("bpf: introduce bpf subcommand BPF_TASK_FD_QUERY") Signed-off-by: Yafang Shao Acked-by: Yonghong Song Acked-by: Jiri Olsa Link: https://lore.kernel.org/r/20230709025630.3735-6-laoar.shao@gmail.com Signed-off-by: Alexei Starovoitov Signed-off-by: Sasha Levin --- include/linux/trace_events.h | 3 ++- kernel/trace/bpf_trace.c | 2 +- kernel/trace/trace_uprobe.c | 3 ++- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index ff137179e0c30..9c91c3531d830 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -846,7 +846,8 @@ extern int perf_uprobe_init(struct perf_event *event, extern void perf_uprobe_destroy(struct perf_event *event); extern int bpf_get_uprobe_info(const struct perf_event *event, u32 *fd_type, const char **filename, - u64 *probe_offset, bool perf_type_tracepoint); + u64 *probe_offset, u64 *probe_addr, + bool perf_type_tracepoint); #endif extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, char *filter_str); diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 6352a41380e53..85a36b19c2b80 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -1996,7 +1996,7 @@ int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, #ifdef CONFIG_UPROBE_EVENTS if (flags & TRACE_EVENT_FL_UPROBE) err = bpf_get_uprobe_info(event, fd_type, buf, - probe_offset, + probe_offset, probe_addr, event->attr.type == PERF_TYPE_TRACEPOINT); #endif } diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index debc651015489..720b46b34ab94 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -1423,7 +1423,7 @@ static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func, int bpf_get_uprobe_info(const struct perf_event *event, u32 *fd_type, const char **filename, u64 *probe_offset, - bool perf_type_tracepoint) + u64 *probe_addr, bool perf_type_tracepoint) { const char *pevent = trace_event_name(event->tp_event); const char *group = event->tp_event->class->system; @@ -1440,6 +1440,7 @@ int bpf_get_uprobe_info(const struct perf_event *event, u32 *fd_type, : BPF_FD_TYPE_UPROBE; *filename = tu->filename; *probe_offset = tu->offset; + *probe_addr = 0; return 0; } #endif /* CONFIG_PERF_EVENTS */ -- 2.40.1