| Message ID | 20210304124851.219154-1-hadess@hadess.net |
|---|---|
| State | New |
| Headers | show |
| Series | [1/3] build: Add warnings for non-literal strings | expand |
This is automated email and please do not reply to this email! Dear submitter, Thank you for submitting the patches to the linux bluetooth mailing list. This is a CI test results with your patch series: PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=442025 ---Test result--- ############################## Test: CheckPatch - PASS ############################## Test: CheckGitLint - FAIL Output: build: Add warnings for non-literal strings 3: B6 Body message is missing obex: Work-around compilation failure 4: B1 Line exceeds max length (123>80): "obexd/plugins/bluetooth.c:310:7: error: format not a string literal, argument types not checked [-Werror=format-nonliteral]" 7: B1 Line exceeds max length (123>80): "obexd/plugins/bluetooth.c:314:7: error: format not a string literal, argument types not checked [-Werror=format-nonliteral]" tools/mesh-cfglient: Work-around compilation failure 4: B1 Line exceeds max length (121>80): "tools/mesh-cfgclient.c:543:10: error: format not a string literal, argument types not checked [-Werror=format-nonliteral]" ############################## Test: CheckBuild - PASS ############################## Test: MakeCheck - PASS --- Regards, Linux Bluetooth
Hi Bastien, On Thu, Mar 4, 2021 at 9:21 AM Bastien Nocera <hadess@hadess.net> wrote: > > --- > acinclude.m4 | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/acinclude.m4 b/acinclude.m4 > index 529848357..6ae34b8ae 100644 > --- a/acinclude.m4 > +++ b/acinclude.m4 > @@ -21,7 +21,7 @@ AC_DEFUN([COMPILER_FLAGS], [ > with_cflags="$with_cflags -Wredundant-decls" > with_cflags="$with_cflags -Wcast-align" > with_cflags="$with_cflags -Wswitch-enum" > - with_cflags="$with_cflags -Wformat -Wformat-security" > + with_cflags="$with_cflags -Wformat -Wformat-security -Wformat-nonliteral" Does it actually have any benefit of having the format as always string literal? I'm not really a big fan of using pragmas. > with_cflags="$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" > -- > 2.29.2 > -- Luiz Augusto von Dentz
Hi Bastien, On Thu, Mar 4, 2021 at 10:46 AM Bastien Nocera <hadess@hadess.net> wrote: > > On Thu, 2021-03-04 at 10:35 -0800, Luiz Augusto von Dentz wrote: > > Hi Bastien, > > > > On Thu, Mar 4, 2021 at 9:21 AM Bastien Nocera <hadess@hadess.net> > > wrote: > > > > > > --- > > > acinclude.m4 | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/acinclude.m4 b/acinclude.m4 > > > index 529848357..6ae34b8ae 100644 > > > --- a/acinclude.m4 > > > +++ b/acinclude.m4 > > > @@ -21,7 +21,7 @@ AC_DEFUN([COMPILER_FLAGS], [ > > > with_cflags="$with_cflags -Wredundant-decls" > > > with_cflags="$with_cflags -Wcast-align" > > > with_cflags="$with_cflags -Wswitch-enum" > > > - with_cflags="$with_cflags -Wformat -Wformat-security" > > > + with_cflags="$with_cflags -Wformat -Wformat-security > > > -Wformat-nonliteral" > > > > Does it actually have any benefit of having the format as always > > string literal? I'm not really a big fan of using pragmas. > > It's a security feature[1], so it's pretty important that we avoid > using non-literals when some of the arguments are user controlled, > especially in a networked daemon. We already enabled > "-Wformat-security", so not that much of a difference. > > This warning is also enabled by default on Fedora's GCC, so I get to > see it whether I want to or not. > > I'd be happy actually fixing those warnings if you don't want pragmas > at all, it would just be more code movement. If we can get those > patches in, I can do a follow-up. > > [1]: Quick search gave me this explanation: > https://owasp.org/www-community/attacks/Format_string_attack You should probably add the above link in the patch description, regarding the use of pragma. I'd say we need to convert to use literals directly then since otherwise we are not actually fixing anything just returning it back to ignore the error where we don't use literals. > > > with_cflags="$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" > > > -- > > > 2.29.2 > > > > > > > > > -- Luiz Augusto von Dentz
On Thu, 2021-03-04 at 10:54 -0800, Luiz Augusto von Dentz wrote: > Hi Bastien, > > On Thu, Mar 4, 2021 at 10:46 AM Bastien Nocera <hadess@hadess.net> > wrote: > > > > On Thu, 2021-03-04 at 10:35 -0800, Luiz Augusto von Dentz wrote: > > > Hi Bastien, > > > > > > On Thu, Mar 4, 2021 at 9:21 AM Bastien Nocera <hadess@hadess.net> > > > wrote: > > > > > > > > --- > > > > acinclude.m4 | 2 +- > > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > > > diff --git a/acinclude.m4 b/acinclude.m4 > > > > index 529848357..6ae34b8ae 100644 > > > > --- a/acinclude.m4 > > > > +++ b/acinclude.m4 > > > > @@ -21,7 +21,7 @@ AC_DEFUN([COMPILER_FLAGS], [ > > > > with_cflags="$with_cflags -Wredundant-decls" > > > > with_cflags="$with_cflags -Wcast-align" > > > > with_cflags="$with_cflags -Wswitch-enum" > > > > - with_cflags="$with_cflags -Wformat -Wformat- > > > > security" > > > > + with_cflags="$with_cflags -Wformat -Wformat- > > > > security > > > > -Wformat-nonliteral" > > > > > > Does it actually have any benefit of having the format as always > > > string literal? I'm not really a big fan of using pragmas. > > > > It's a security feature[1], so it's pretty important that we avoid > > using non-literals when some of the arguments are user controlled, > > especially in a networked daemon. We already enabled > > "-Wformat-security", so not that much of a difference. > > > > This warning is also enabled by default on Fedora's GCC, so I get > > to > > see it whether I want to or not. > > > > I'd be happy actually fixing those warnings if you don't want > > pragmas > > at all, it would just be more code movement. If we can get those > > patches in, I can do a follow-up. > > > > [1]: Quick search gave me this explanation: > > https://owasp.org/www-community/attacks/Format_string_attack > > You should probably add the above link in the patch description, > regarding the use of pragma. I'd say we need to convert to use > literals directly then since otherwise we are not actually fixing > anything We're presumably stopping new non-literals from being introduced... As I mentioned, I can do a follow-up, but I'm not going to do the work until this patch series is merged. I've sent it a number of times already and after 4 years, I'm not sure I want to do the work again only for it to rot in my repo. > just returning it back to ignore the error where we don't use > literals. > > > > > with_cflags="$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" > > > > -- > > > > 2.29.2 > > > > > > > > > > > > > > > >
diff --git a/acinclude.m4 b/acinclude.m4 index 529848357..6ae34b8ae 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -21,7 +21,7 @@ AC_DEFUN([COMPILER_FLAGS], [ with_cflags="$with_cflags -Wredundant-decls" with_cflags="$with_cflags -Wcast-align" with_cflags="$with_cflags -Wswitch-enum" - with_cflags="$with_cflags -Wformat -Wformat-security" + with_cflags="$with_cflags -Wformat -Wformat-security -Wformat-nonliteral" with_cflags="$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"