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Rao" , linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Jinchao Wang Subject: [PATCH 16/17] tools/kstackwatch: add interactive test script for KStackWatch Date: Thu, 28 Aug 2025 15:32:49 +0800 Message-ID: <20250828073311.1116593-17-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250828073311.1116593-1-wangjinchao600@gmail.com> References: <20250828073311.1116593-1-wangjinchao600@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Introduce kstackwatch_test.sh, a shell script to facilitate running various test scenarios interactively or via command-line arguments. Signed-off-by: Jinchao Wang --- tools/kstackwatch/kstackwatch_test.sh | 118 ++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 tools/kstackwatch/kstackwatch_test.sh diff --git a/tools/kstackwatch/kstackwatch_test.sh b/tools/kstackwatch/ksta= ckwatch_test.sh new file mode 100644 index 000000000000..af0fbdb3a975 --- /dev/null +++ b/tools/kstackwatch/kstackwatch_test.sh @@ -0,0 +1,118 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# --- Usage function --- +usage() { + echo "=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D" + echo " KStackWatch Test Script Usage" + echo "=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D" + echo "" + echo "IMPORTANT: Before running, make sure you have updated the offset va= lues!" + echo "" + echo "To find your offsets, use objdump:" + echo " objdump -S --disassemble=3Dcanary_test_write vmlinux" + echo "" + echo "Then search for your function names to find the instruction address= es." + echo "- Instruction offset: address relative to function's start" + echo "- Stack var offset: distance from stack base (%rbp) to the variable" + echo "" + echo "Usage: $0 [test_case_number]" + echo "" + echo "Available test cases:" + echo " 0 - Canary Write Test" + echo " 1 - Canary Overflow Test" + echo " 2 - Silient Corruption Test" + echo " 3 - Recursive Corruption Test" + echo "" + echo "=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D" + echo "" +} + +# --- Interactive menu --- +show_menu() { + echo "Select a test case to run:" + echo " 0) Canary Write Test" + echo " 1) Canary Overflow Test" + echo " 2) Silient Corruption Test" + echo " 3) Recursive Corruption Test" + echo " q) Quit" + echo "" + echo "WARNING: Each test may cause system crash/hang!" + echo "" + read -p "Enter your choice [0-3/q]: " choice + echo "" + + case "$choice" in + 0) test0 ;; + 1) test1 ;; + 2) test2 ;; + 3) test3 ;; + q | Q) + echo "Exiting..." + exit 0 + ;; + *) + echo "Invalid choice. Please try again." + echo "" + show_menu + ;; + esac +} + +# --- Test Case 0: Canary Write --- +test0() { + echo "=3D=3D=3D Running Test Case 0: Canary Write =3D=3D=3D" + # function+instruction_off[+depth] [local_var_offset:local_var_len] + echo "canary_test_write+0x12" >/proc/kstackwatch + echo "test0" >/proc/kstackwatch_test + echo >/proc/kstackwatch +} + +# --- Test Case 1: Canary Overflow --- +test1() { + echo "=3D=3D=3D Running Test Case 1: Canary Overflow =3D=3D=3D" + # function+instruction_off[+depth] [local_var_offset:local_var_len] + echo "canary_test_overflow+0x12" >/proc/kstackwatch + echo "test1" >/proc/kstackwatch_test + echo >/proc/kstackwatch + +} + +# --- Test Case 2: Silient Corruption --- +test2() { + echo "=3D=3D=3D Running Test Case 2: Silient Corruption =3D=3D=3D" + # function+instruction_off[+depth] [local_var_offset:local_var_len] + echo "silent_corruption_hapless+0x7f 0:8" >/proc/kstackwatch + echo "test2" >/proc/kstackwatch_test + echo >/proc/kstackwatch +} + +# --- Test Case 3: Recursive Corruption --- +test3() { + echo "=3D=3D=3D Running Test Case 3: Recursive Corruption =3D=3D=3D" + # function+instruction_off[+depth] [local_var_offset:local_var_len] + echo "recursive_corruption_test+0x1b+3 0:8" >/proc/kstackwatch + echo "test3" >/proc/kstackwatch_test + echo >/proc/kstackwatch +} + +# --- Main --- +if [ -z "$1" ]; then + usage + echo "" + show_menu +else + case "$1" in + 0) test0 ;; + 1) test1 ;; + 2) test2 ;; + 3) test3 ;; + help | --help | -h) usage ;; + *) + echo "Error: Invalid argument '$1'" + echo "" + usage + exit 1 + ;; + esac +fi --=20 2.43.0