Patch "tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y" has been added to the 4.14-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tracing-prevent-profile_all_branches-when-fortify_source-y.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 68e76e034b6b1c1ce2eece1ab8ae4008e14be470 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Mon, 15 Jan 2018 11:07:27 -0800
Subject: tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y

From: Randy Dunlap <rdunlap@infradead.org>

commit 68e76e034b6b1c1ce2eece1ab8ae4008e14be470 upstream.

I regularly get 50 MB - 60 MB files during kernel randconfig builds.
These large files mostly contain (many repeats of; e.g., 124,594):

In file included from ../include/linux/string.h:6:0,
                 from ../include/linux/uuid.h:20,
                 from ../include/linux/mod_devicetable.h:13,
                 from ../scripts/mod/devicetable-offsets.c:3:
../include/linux/compiler.h:64:4: warning: '______f' is static but declared in inline function 'strcpy' which is not static [enabled by default]
    ______f = {     \
    ^
../include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
                       ^
../include/linux/string.h:425:2: note: in expansion of macro 'if'
  if (p_size == (size_t)-1 && q_size == (size_t)-1)
  ^

This only happens when CONFIG_FORTIFY_SOURCE=y and
CONFIG_PROFILE_ALL_BRANCHES=y, so prevent PROFILE_ALL_BRANCHES if
FORTIFY_SOURCE=y.

Link: http://lkml.kernel.org/r/9199446b-a141-c0c3-9678-a3f9107f2750@infradead.org

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/trace/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -343,7 +343,7 @@ config PROFILE_ANNOTATED_BRANCHES
 	  on if you need to profile the system's use of these macros.
 
 config PROFILE_ALL_BRANCHES
-	bool "Profile all if conditionals"
+	bool "Profile all if conditionals" if !FORTIFY_SOURCE
 	select TRACE_BRANCH_PROFILING
 	help
 	  This tracer profiles all branch conditions. Every if ()


Patches currently in stable-queue which might be from rdunlap@infradead.org are

queue-4.14/tracing-prevent-profile_all_branches-when-fortify_source-y.patch