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gh-112301: Add fortify source level 3 to default compiler options (gh-121520)

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Nate Ohlson 2024-07-18 13:06:51 -03:00 committed by GitHub
parent 94e6644584
commit bdab67e1c7
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3 changed files with 42 additions and 0 deletions
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2
Misc/NEWS.d/next/Security/2024-07-08-23-39-04.gh-issue-112301.TD8G01.rst Normal file
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@ -0,0 +1,2 @@
Enable runtime protections for glibc to abort execution when unsafe behavior is encountered,
for all platforms except Windows.

39
configure generated vendored
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@ -9691,6 +9691,45 @@ else $as_nop
printf "%s\n" "$as_me: WARNING: -Wtrampolines not supported" >&2;}
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -D_FORTIFY_SOURCE=3" >&5
printf %s "checking whether C compiler accepts -D_FORTIFY_SOURCE=3... " >&6; }
if test ${ax_cv_check_cflags___D_FORTIFY_SOURCE_3+y}
then :
printf %s "(cached) " >&6
else $as_nop
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=3"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main (void)
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
ax_cv_check_cflags___D_FORTIFY_SOURCE_3=yes
else $as_nop
ax_cv_check_cflags___D_FORTIFY_SOURCE_3=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___D_FORTIFY_SOURCE_3" >&5
printf "%s\n" "$ax_cv_check_cflags___D_FORTIFY_SOURCE_3" >&6; }
if test "x$ax_cv_check_cflags___D_FORTIFY_SOURCE_3" = xyes
then :
BASECFLAGS="$BASECFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3"
else $as_nop
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: -D_FORTIFY_SOURCE=3 not supported" >&5
printf "%s\n" "$as_me: WARNING: -D_FORTIFY_SOURCE=3 not supported" >&2;}
fi
case $GCC in
yes)

1
configure.ac
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@ -2460,6 +2460,7 @@ AS_VAR_IF([with_strict_overflow], [yes],
# These flags should be enabled by default for all builds.
AX_CHECK_COMPILE_FLAG([-fstack-protector-strong], [BASECFLAGS="$BASECFLAGS -fstack-protector-strong"], [AC_MSG_WARN([-fstack-protector-strong not supported])], [-Werror])
AX_CHECK_COMPILE_FLAG([-Wtrampolines], [BASECFLAGS="$BASECFLAGS -Wtrampolines"], [AC_MSG_WARN([-Wtrampolines not supported])], [-Werror])
AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=3], [BASECFLAGS="$BASECFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3"], [AC_MSG_WARN([-D_FORTIFY_SOURCE=3 not supported])])
case $GCC in
yes)