Patch "perf auxtrace: Fix address filter symbol name match for modules" has been added to the 5.4-stable tree

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

    perf auxtrace: Fix address filter symbol name match for modules

to the 5.4-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:
     perf-auxtrace-fix-address-filter-symbol-name-match-for-modules.patch
and it can be found in the queue-5.4 subdirectory.

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


>From cba04f3136b658583adb191556f99d087589c1cc Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Wed, 26 Oct 2022 10:27:36 +0300
Subject: perf auxtrace: Fix address filter symbol name match for modules

From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

commit cba04f3136b658583adb191556f99d087589c1cc upstream.

For modules, names from kallsyms__parse() contain the module name which
meant that module symbols did not match exactly by name.

Fix by matching the name string up to the separating tab character.

Fixes: 1b36c03e356936d6 ("perf record: Add support for using symbols in address filters")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20221026072736.2982-1-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 tools/perf/util/auxtrace.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -1710,11 +1710,19 @@ struct sym_args {
 	bool		near;
 };
 
+static bool kern_sym_name_match(const char *kname, const char *name)
+{
+	size_t n = strlen(name);
+
+	return !strcmp(kname, name) ||
+	       (!strncmp(kname, name, n) && kname[n] == '\t');
+}
+
 static bool kern_sym_match(struct sym_args *args, const char *name, char type)
 {
 	/* A function with the same name, and global or the n'th found or any */
 	return kallsyms__is_function(type) &&
-	       !strcmp(name, args->name) &&
+	       kern_sym_name_match(name, args->name) &&
 	       ((args->global && isupper(type)) ||
 		(args->selected && ++(args->cnt) == args->idx) ||
 		(!args->global && !args->selected));


Patches currently in stable-queue which might be from adrian.hunter@xxxxxxxxx are

queue-5.4/perf-auxtrace-fix-address-filter-symbol-name-match-for-modules.patch



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