5.6-stable patches

added patches:
	elfnote-mark-all-.note-sections-shf_alloc.patch

diff --git a/queue-5.6/elfnote-mark-all-.note-sections-shf_alloc.patch b/queue-5.6/elfnote-mark-all-.note-sections-shf_alloc.patch
new file mode 100644 (file)
index 0000000..9ef04b4
--- /dev/null
+++ b/queue-5.6/elfnote-mark-all-.note-sections-shf_alloc.patch
@@ -0,0 +1,58 @@
+From 51da9dfb7f20911ae4e79e9b412a9c2d4c373d4b Mon Sep 17 00:00:00 2001
+From: Nick Desaulniers <ndesaulniers@google.com>
+Date: Thu, 4 Jun 2020 16:50:49 -0700
+Subject: elfnote: mark all .note sections SHF_ALLOC
+
+From: Nick Desaulniers <ndesaulniers@google.com>
+
+commit 51da9dfb7f20911ae4e79e9b412a9c2d4c373d4b upstream.
+
+ELFNOTE_START allows callers to specify flags for .pushsection assembler
+directives.  All callsites but ELF_NOTE use "a" for SHF_ALLOC.  For vdso's
+that explicitly use ELF_NOTE_START and BUILD_SALT, the same section is
+specified twice after preprocessing, once with "a" flag, once without.
+Example:
+
+.pushsection .note.Linux, "a", @note ;
+.pushsection .note.Linux, "", @note ;
+
+While GNU as allows this ordering, it warns for the opposite ordering,
+making these directives position dependent.  We'd prefer not to precisely
+match this behavior in Clang's integrated assembler.  Instead, the non
+__ASSEMBLY__ definition of ELF_NOTE uses
+__attribute__((section(".note.Linux"))) which is created with SHF_ALLOC,
+so let's make the __ASSEMBLY__ definition of ELF_NOTE consistent with C
+and just always use "a" flag.
+
+This allows Clang to assemble a working mainline (5.6) kernel via:
+$ make CC=clang AS=clang
+
+Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
+Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
+Reviewed-by: Fangrui Song <maskray@google.com>
+Cc: Jeremy Fitzhardinge <jeremy@goop.org>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
+Link: https://github.com/ClangBuiltLinux/linux/issues/913
+Link: http://lkml.kernel.org/r/20200325231250.99205-1-ndesaulniers@google.com
+Debugged-by: Ilie Halip <ilie.halip@gmail.com>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Jian Cai <jiancai@google.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ include/linux/elfnote.h |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/include/linux/elfnote.h
++++ b/include/linux/elfnote.h
+@@ -54,7 +54,7 @@
+ .popsection                           ;
+ 
+ #define ELFNOTE(name, type, desc)             \
+-      ELFNOTE_START(name, type, "")           \
++      ELFNOTE_START(name, type, "a")          \
+               desc                    ;       \
+       ELFNOTE_END
+ 

diff --git a/queue-5.6/series b/queue-5.6/series
index d8160a7de0a33ea5f2a224077231c4e387e1bbb1..c19c18a9b5d5cd2c9c4f07f2c48ff478b7097adf 100644 (file)
--- a/queue-5.6/series
+++ b/queue-5.6/series
@@ -10,3 +10,4 @@ genetlink-fix-memory-leaks-in-genl_family_rcv_msg_dumpit.patch
 net-dsa-qca8k-fix-unexpected-gfp-kernel-exception.patch
 tipc-fix-null-pointer-dereference-in-streaming.patch
 bpf-support-llvm-objcopy-for-vmlinux-btf.patch
+elfnote-mark-all-.note-sections-shf_alloc.patch