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Message-ID: <20251110163634.3686676-26-wangjinchao600@gmail.com>
Date: Tue, 11 Nov 2025 00:36:20 +0800
From: Jinchao Wang <wangjinchao600@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Randy Dunlap <rdunlap@...radead.org>,
Marco Elver <elver@...gle.com>,
Mike Rapoport <rppt@...nel.org>,
Alexander Potapenko <glider@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alice Ryhl <aliceryhl@...gle.com>,
Andrey Konovalov <andreyknvl@...il.com>,
Andrey Ryabinin <ryabinin.a.a@...il.com>,
Andrii Nakryiko <andrii@...nel.org>,
Ard Biesheuvel <ardb@...nel.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Ben Segall <bsegall@...gle.com>,
Bill Wendling <morbo@...gle.com>,
Borislav Petkov <bp@...en8.de>,
Catalin Marinas <catalin.marinas@....com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
David Hildenbrand <david@...hat.com>,
David Kaplan <david.kaplan@....com>,
"David S. Miller" <davem@...emloft.net>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Dmitry Vyukov <dvyukov@...gle.com>,
"H. Peter Anvin" <hpa@...or.com>,
Ian Rogers <irogers@...gle.com>,
Ingo Molnar <mingo@...hat.com>,
James Clark <james.clark@...aro.org>,
Jinchao Wang <wangjinchao600@...il.com>,
Jinjie Ruan <ruanjinjie@...wei.com>,
Jiri Olsa <jolsa@...nel.org>,
Jonathan Corbet <corbet@....net>,
Juri Lelli <juri.lelli@...hat.com>,
Justin Stitt <justinstitt@...gle.com>,
kasan-dev@...glegroups.com,
Kees Cook <kees@...nel.org>,
"Liam R. Howlett" <Liam.Howlett@...cle.com>,
"Liang Kan" <kan.liang@...ux.intel.com>,
Linus Walleij <linus.walleij@...aro.org>,
linux-arm-kernel@...ts.infradead.org,
linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-mm@...ck.org,
linux-perf-users@...r.kernel.org,
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llvm@...ts.linux.dev,
Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
Mark Rutland <mark.rutland@....com>,
Masahiro Yamada <masahiroy@...nel.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Mel Gorman <mgorman@...e.de>,
Michal Hocko <mhocko@...e.com>,
Miguel Ojeda <ojeda@...nel.org>,
Nam Cao <namcao@...utronix.de>,
Namhyung Kim <namhyung@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Naveen N Rao <naveen@...nel.org>,
Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
Rong Xu <xur@...gle.com>,
Sami Tolvanen <samitolvanen@...gle.com>,
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Suren Baghdasaryan <surenb@...gle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
Valentin Schneider <vschneid@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Vincenzo Frascino <vincenzo.frascino@....com>,
Vlastimil Babka <vbabka@...e.cz>,
Will Deacon <will@...nel.org>,
workflows@...r.kernel.org,
x86@...nel.org
Subject: [PATCH v8 25/27] tools/ksw: add arch-specific test script
Add a shell script under tools/kstackwatch to run self-tests such as
canary overflow and recursive depth. The script supports both x86_64
and arm64, selecting parameters automatically based on uname -m.
Signed-off-by: Jinchao Wang <wangjinchao600@...il.com>
---
tools/kstackwatch/kstackwatch_test.sh | 85 +++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
create mode 100755 tools/kstackwatch/kstackwatch_test.sh
diff --git a/tools/kstackwatch/kstackwatch_test.sh b/tools/kstackwatch/kstackwatch_test.sh
new file mode 100755
index 000000000000..6e83397d3213
--- /dev/null
+++ b/tools/kstackwatch/kstackwatch_test.sh
@@ -0,0 +1,85 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+echo "IMPORTANT: Before running, make sure you have updated the config values!"
+
+usage() {
+ echo "Usage: $0 [0-5]"
+ echo " 0 - test watch fire"
+ echo " 1 - test canary overflow"
+ echo " 2 - test recursive depth"
+ echo " 3 - test silent corruption"
+ echo " 4 - test multi-threaded silent corruption"
+ echo " 5 - test multi-threaded overflow"
+}
+
+run_test_x86_64() {
+ local test_num=$1
+ case "$test_num" in
+ 0) echo fn=test_watch_fire fo=0x29 ac=1 >/sys/kernel/debug/kstackwatch/config
+ echo test0 > /sys/kernel/debug/kstackwatch/test
+ ;;
+ 1) echo fn=test_canary_overflow fo=0x14 >/sys/kernel/debug/kstackwatch/config
+ echo test1 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 2) echo fn=test_recursive_depth fo=0x2f dp=3 wl=8 so=0 >/sys/kernel/debug/kstackwatch/config
+ echo test2 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 3) echo fn=test_mthread_victim fo=0x4c so=64 wl=8 >/sys/kernel/debug/kstackwatch/config
+ echo test3 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 4) echo fn=test_mthread_victim fo=0x4c so=64 wl=8 >/sys/kernel/debug/kstackwatch/config
+ echo test4 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 5) echo fn=test_mthread_buggy fo=0x16 so=0x100 wl=8 >/sys/kernel/debug/kstackwatch/config
+ echo test5 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ *) usage
+ exit 1 ;;
+ esac
+ # Reset watch after test
+ echo >/sys/kernel/debug/kstackwatch/config
+}
+
+run_test_arm64() {
+ local test_num=$1
+ case "$test_num" in
+ 0) echo fn=test_watch_fire fo=0x50 ac=1 >/sys/kernel/debug/kstackwatch/config
+ echo test0 > /sys/kernel/debug/kstackwatch/test
+ ;;
+ 1) echo fn=test_canary_overflow fo=0x20 so=264 >/sys/kernel/debug/kstackwatch/config
+ echo test1 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 2) echo fn=test_recursive_depth fo=0x34 dp=3 wl=8 so=8 >/sys/kernel/debug/kstackwatch/config
+ echo test2 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 3) echo fn=test_mthread_victim fo=0x6c so=0x48 wl=8 >/sys/kernel/debug/kstackwatch/config
+ echo test3 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 4) echo fn=test_mthread_victim fo=0x6c so=0x48 wl=8 >/sys/kernel/debug/kstackwatch/config
+ echo test4 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ 5) echo fn=test_mthread_buggy fo=0x20 so=264 >/sys/kernel/debug/kstackwatch/config
+ echo test5 >/sys/kernel/debug/kstackwatch/test
+ ;;
+ *) usage
+ exit 1 ;;
+ esac
+ # Reset watch after test
+ echo >/sys/kernel/debug/kstackwatch/config
+}
+
+# Check root and module
+[ "$EUID" -ne 0 ] && echo "Run as root" && exit 1
+for f in /sys/kernel/debug/kstackwatch/config /sys/kernel/debug/kstackwatch/test; do
+ [ ! -f "$f" ] && echo "$f not found" && exit 1
+done
+
+# Run
+[ -z "$1" ] && { usage; exit 0; }
+
+arch=$(uname -m)
+case "$arch" in
+ x86_64|aarch64) run_test_${arch} "$1" ;;
+ *) echo "Unsupported architecture: $arch" && exit 1 ;;
+esac
--
2.43.0
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