Patch "perf auxtrace: Fix address filter entire kernel size" 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

    perf auxtrace: Fix address filter entire kernel size

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:
     perf-auxtrace-fix-address-filter-entire-kernel-size.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.


>From 1f9f33ccf0320be21703d9195dd2b36a1c9a07cb Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Mon, 3 Apr 2023 18:48:30 +0300
Subject: perf auxtrace: Fix address filter entire kernel size

From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

commit 1f9f33ccf0320be21703d9195dd2b36a1c9a07cb upstream.

kallsyms is not completely in address order.

In find_entire_kern_cb(), calculate the kernel end from the maximum
address not the last symbol.

Example:

 Before:

    $ sudo cat /proc/kallsyms | grep ' [twTw] ' | tail -1
    ffffffffc00b8bd0 t bpf_prog_6deef7357e7b4530    [bpf]
    $ sudo cat /proc/kallsyms | grep ' [twTw] ' | sort | tail -1
    ffffffffc15e0cc0 t iwl_mvm_exit [iwlmvm]
    $ perf.d093603a05aa record -v --kcore -e intel_pt// --filter 'filter *' -- uname |& grep filter
    Address filter: filter 0xffffffff93200000/0x2ceba000

 After:

    $ perf.8fb0f7a01f8e record -v --kcore -e intel_pt// --filter 'filter *' -- uname |& grep filter
    Address filter: filter 0xffffffff93200000/0x2e3e2000

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/20230403154831.8651-2-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 |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -2443,6 +2443,7 @@ static int find_entire_kern_cb(void *arg
 			       char type, u64 start)
 {
 	struct sym_args *args = arg;
+	u64 size;
 
 	if (!kallsyms__is_function(type))
 		return 0;
@@ -2452,7 +2453,9 @@ static int find_entire_kern_cb(void *arg
 		args->start = start;
 	}
 	/* Don't know exactly where the kernel ends, so we add a page */
-	args->size = round_up(start, page_size) + page_size - args->start;
+	size = round_up(start, page_size) + page_size - args->start;
+	if (size > args->size)
+		args->size = size;
 
 	return 0;
 }


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

queue-6.1/perf-auxtrace-fix-address-filter-entire-kernel-size.patch
queue-6.1/perf-intel-pt-fix-cyc-timestamps-after-standalone-cbr.patch
queue-6.1/mmc-sdhci-of-esdhc-fix-quirk-to-ignore-command-inhib.patch



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