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Mon, 31 Aug 2026 01:16:46 -0700 (PDT) Received: from localhost ([2a07:de40:b240:0:2ad6:ed42:2ad6:ed42]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-482fbb2005esm21156816f8f.24.2026.08.31.01.16.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Aug 2026 01:16:45 -0700 (PDT) To: ltp@lists.linux.it Date: Mon, 31 Aug 2026 08:16:34 +0000 Message-ID: <20260831081638.19539-3-wegao@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260831081638.19539-1-wegao@suse.com> References: <20260831081638.19539-1-wegao@suse.com> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 1.0.9 at in-4.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH v9 2/2] shmctl03: Fix 32-bit compat mode failure X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Wei Gao via ltp Reply-To: Wei Gao Cc: Dan Carpenter Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" On 64-bit kernels, the default shmmax and shmall values often exceed the range of a 32-bit unsigned long or are clipped differently by the kernel's compat syscall layer than they appear in /proc. Fix this by utilizing the new TST_ASSERT_ULONG() flags to properly clamp and truncate the expected values under compat mode. Link: https://lore.kernel.org/ltp/aJm5SBOaRoe1e0PB@yuki.lan/ Suggested-by: Cyril Hrubis Reviewed-by: Andrea Cervesato Reported-by: Dan Carpenter Signed-off-by: Wei Gao --- testcases/kernel/syscalls/shmctl/shmctl03.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/testcases/kernel/syscalls/shmctl/shmctl03.c b/testcases/kernel/syscalls/shmctl/shmctl03.c index 9e1c2f099..fcb416a1d 100644 --- a/testcases/kernel/syscalls/shmctl/shmctl03.c +++ b/testcases/kernel/syscalls/shmctl/shmctl03.c @@ -30,9 +30,16 @@ static void verify_ipcinfo(void) else tst_res(TPASS, "shmmin = 1"); - TST_ASSERT_ULONG(PATH_KERN_SHMMAX, info.shmmax); - TST_ASSERT_ULONG(PATH_KERN_SHMMNI, info.shmmni); - TST_ASSERT_ULONG(PATH_KERN_SHMALL, info.shmall); + int c = tst_is_compat_mode(); + + /* + * On 64-bit kernel, shmmax is clamped to INT_MAX for 32-bit + * compat syscall, while shmmni and shmall are truncated + * to 32-bit. + */ + TST_ASSERT_ULONG(PATH_KERN_SHMMAX, info.shmmax, c ? TST_ASSERT_SATURATED_INT : TST_ASSERT_NONE); + TST_ASSERT_ULONG(PATH_KERN_SHMMNI, info.shmmni, c ? TST_ASSERT_TRUNC_32BIT : TST_ASSERT_NONE); + TST_ASSERT_ULONG(PATH_KERN_SHMALL, info.shmall, c ? TST_ASSERT_TRUNC_32BIT : TST_ASSERT_NONE); } static struct tst_test test = { -- 2.55.0 -- Mailing list info: https://lists.linux.it/listinfo/ltp