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%3Ba=su...
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