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(syn-107-146-107-067.res.spectrum.com. [107.146.107.67]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-51eb1be873csm1602232e0c.10.2025.02.04.12.19.49 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Feb 2025 12:19:49 -0800 (PST) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH BlueZ v2 1/2] build: Enable -Wstringop-overflow and -D_FORTIFY_SOURCE=3 Date: Tue, 4 Feb 2025 15:19:47 -0500 Message-ID: <20250204201948.2883452-1-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Luiz Augusto von Dentz This enables -Wstringop-overflow compiler warnings: 'Warn for calls to string manipulation functions such as "memcpy" and "strcpy" that are determined to overflow the destination buffer.' Along with -D_FORTIFY_SOURCE=3 so the errors like the following can be captured: In function ‘read’, inlined from ‘serial_read_callback’ at emulator/serial.c:90:8: /usr/include/bits/unistd.h:32:10: error: ‘__read_alias’ specified size between 18446744073709490177 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Werror=stringop-overflow=] 32 | return __glibc_fortify (read, __nbytes, sizeof (char), | ^~~~~~~~~~~~~~~ --- acinclude.m4 | 2 ++ 1 file changed, 2 insertions(+) diff --git a/acinclude.m4 b/acinclude.m4 index 4b73a5bfc38f..9f2dc302e7bc 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -61,9 +61,11 @@ AC_DEFUN([COMPILER_FLAGS], [ with_cflags="$with_cflags -Wcast-align" with_cflags="$with_cflags -Wswitch-enum" with_cflags="$with_cflags -Wformat -Wformat-security" + with_cflags="$with_cflags -Wstringop-overflow" with_cflags="$with_cflags -DG_DISABLE_DEPRECATED" with_cflags="$with_cflags -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_28" with_cflags="$with_cflags -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32" + with_cflags="$with_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3" fi AC_SUBST([WARNING_CFLAGS], $with_cflags) ])