Patch "bpf: Clear the probe_addr for uprobe" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    bpf: Clear the probe_addr for uprobe

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     bpf-clear-the-probe_addr-for-uprobe.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f38093e5daa1bc0d428dbfb6d4ecf70d3a707094
Author: Yafang Shao <laoar.shao@xxxxxxxxx>
Date:   Sun Jul 9 02:56:25 2023 +0000

    bpf: Clear the probe_addr for uprobe
    
    [ 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 <laoar.shao@xxxxxxxxx>
    Acked-by: Yonghong Song <yhs@xxxxxx>
    Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230709025630.3735-6-laoar.shao@xxxxxxxxx
    Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index 04c59f8d801f1..422f4ca656cf9 100644
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -863,7 +863,8 @@ 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 ad04390883ada..9fc5db194027b 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -2390,7 +2390,7 @@ 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 2ac06a642863a..127c78aec17db 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -1418,7 +1418,7 @@ 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;
@@ -1435,6 +1435,7 @@ 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 */



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