1 files changed, 72 insertions, 0 deletions

diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh
index bbaf29386995..a07668a5c36b 100755
--- a/scripts/headers_install.sh
+++ b/scripts/headers_install.sh
@@ -41,5 +41,77 @@ sed -E -e '
 scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
 [ $? -gt 1 ] && exit 1
 
+# Remove /* ... */ style comments, and find CONFIG_ references in code
+configs=$(sed -e '
+:comment
+        s:/\*[^*][^*]*:/*:
+        s:/\*\*\**\([^/]\):/*\1:
+        t comment
+        s:/\*\*/: :
+        t comment
+        /\/\*/! b check
+        N
+        b comment
+:print
+        P
+        D
+:check
+        s:^\(CONFIG_[[:alnum:]_]*\):\1\n:
+        t print
+        s:^[[:alnum:]_][[:alnum:]_]*::
+        s:^[^[:alnum:]_][^[:alnum:]_]*::
+        t check
+        d
+' $OUTFILE)
+
+# The entries in the following list are not warned.
+# Please do not add a new entry. This list is only for existing ones.
+# The list will be reduced gradually, and deleted eventually. (hopefully)
+#
+# The format is <file-name>:<CONFIG-option> in each line.
+config_leak_ignores="
+arch/alpha/include/uapi/asm/setup.h:CONFIG_ALPHA_LEGACY_START_ADDRESS
+arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_16K
+arch/arc/include/uapi/asm/page.h:CONFIG_ARC_PAGE_SIZE_4K
+arch/arc/include/uapi/asm/swab.h:CONFIG_ARC_HAS_SWAPE
+arch/arm/include/uapi/asm/ptrace.h:CONFIG_CPU_ENDIAN_BE8
+arch/hexagon/include/uapi/asm/ptrace.h:CONFIG_HEXAGON_ARCH_VERSION
+arch/hexagon/include/uapi/asm/user.h:CONFIG_HEXAGON_ARCH_VERSION
+arch/ia64/include/uapi/asm/cmpxchg.h:CONFIG_IA64_DEBUG_CMPXCHG
+arch/m68k/include/uapi/asm/ptrace.h:CONFIG_COLDFIRE
+arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
+arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT
+arch/sh/include/uapi/asm/ptrace.h:CONFIG_CPU_SH5
+arch/sh/include/uapi/asm/sigcontext.h:CONFIG_CPU_SH5
+arch/sh/include/uapi/asm/stat.h:CONFIG_CPU_SH5
+arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION
+arch/x86/include/uapi/asm/auxvec.h:CONFIG_X86_64
+arch/x86/include/uapi/asm/mman.h:CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
+include/uapi/asm-generic/fcntl.h:CONFIG_64BIT
+include/uapi/linux/atmdev.h:CONFIG_COMPAT
+include/uapi/linux/elfcore.h:CONFIG_BINFMT_ELF_FDPIC
+include/uapi/linux/eventpoll.h:CONFIG_PM_SLEEP
+include/uapi/linux/hw_breakpoint.h:CONFIG_HAVE_MIXED_BREAKPOINTS_REGS
+include/uapi/linux/pktcdvd.h:CONFIG_CDROM_PKTCDVD_WCACHE
+include/uapi/linux/raw.h:CONFIG_MAX_RAW_DEVS
+"
+
+for c in $configs
+do
+        warn=1
+
+        for ignore in $config_leak_ignores
+        do
+                if echo "$INFILE:$c" | grep -q "$ignore$"; then
+                        warn=
+                        break
+                fi
+        done
+
+        if [ "$warn" = 1 ]; then
+                echo "warning: $INFILE: leak $c to user-space" >&2
+        fi
+done
+
 rm -f $TMPFILE
 trap - EXIT