releases/4.14.21/tracing-prevent-profile_all_branches-when-fortify_source-y.patch

   1 From 68e76e034b6b1c1ce2eece1ab8ae4008e14be470 Mon Sep 17 00:00:00 2001
   2 From: Randy Dunlap <rdunlap@infradead.org>
   3 Date: Mon, 15 Jan 2018 11:07:27 -0800
   4 Subject: tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y
   5
   6 From: Randy Dunlap <rdunlap@infradead.org>
   7
   8 commit 68e76e034b6b1c1ce2eece1ab8ae4008e14be470 upstream.
   9
  10 I regularly get 50 MB - 60 MB files during kernel randconfig builds.
  11 These large files mostly contain (many repeats of; e.g., 124,594):
  12
  13 In file included from ../include/linux/string.h:6:0,
  14                  from ../include/linux/uuid.h:20,
  15                  from ../include/linux/mod_devicetable.h:13,
  16                  from ../scripts/mod/devicetable-offsets.c:3:
  17 ../include/linux/compiler.h:64:4: warning: '______f' is static but declared in inline function 'strcpy' which is not static [enabled by default]
  18     ______f = {     \
  19     ^
  20 ../include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
  21                        ^
  22 ../include/linux/string.h:425:2: note: in expansion of macro 'if'
  23   if (p_size == (size_t)-1 && q_size == (size_t)-1)
  24   ^
  25
  26 This only happens when CONFIG_FORTIFY_SOURCE=y and
  27 CONFIG_PROFILE_ALL_BRANCHES=y, so prevent PROFILE_ALL_BRANCHES if
  28 FORTIFY_SOURCE=y.
  29
  30 Link: http://lkml.kernel.org/r/9199446b-a141-c0c3-9678-a3f9107f2750@infradead.org
  31
  32 Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
  33 Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
  34 Cc: Arnd Bergmann <arnd@arndb.de>
  35 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  36
  37 ---
  38  kernel/trace/Kconfig |    2 +-
  39  1 file changed, 1 insertion(+), 1 deletion(-)
  40
  41 --- a/kernel/trace/Kconfig
  42 +++ b/kernel/trace/Kconfig
  43 @@ -343,7 +343,7 @@ config PROFILE_ANNOTATED_BRANCHES
  44           on if you need to profile the system's use of these macros.
  45
  46  config PROFILE_ALL_BRANCHES
  47 -       bool "Profile all if conditionals"
  48 +       bool "Profile all if conditionals" if !FORTIFY_SOURCE
  49         select TRACE_BRANCH_PROFILING
  50         help
  51           This tracer profiles all branch conditions. Every if ()