* Patch "objtool: Don't report end of section error after an empty unwind hint" has been added to the 4.14-stable tree
@ 2017-12-20 15:14 gregkh
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From: gregkh @ 2017-12-20 15:14 UTC (permalink / raw)
To: jpoimboe, boris.ostrovsky, gregkh, jgross, jslaby, luto, mingo,
peterz, tglx, torvalds
Cc: stable, stable-commits
This is a note to let you know that I've just added the patch titled
objtool: Don't report end of section error after an empty unwind hint
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:
objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.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 00d96180dc38ef872ac471c2d3e14b067cbd895d Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Mon, 18 Sep 2017 21:43:30 -0500
Subject: objtool: Don't report end of section error after an empty unwind hint
From: Josh Poimboeuf <jpoimboe@redhat.com>
commit 00d96180dc38ef872ac471c2d3e14b067cbd895d upstream.
If asm code specifies an UNWIND_HINT_EMPTY hint, don't warn if the
section ends unexpectedly. This can happen with the xen-head.S code
because the hypercall_page is "text" but it's all zeros.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/ddafe199dd8797e40e3c2777373347eba1d65572.1505764066.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/objtool/check.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1757,11 +1757,14 @@ static int validate_branch(struct objtoo
if (insn->dead_end)
return 0;
- insn = next_insn;
- if (!insn) {
+ if (!next_insn) {
+ if (state.cfa.base == CFI_UNDEFINED)
+ return 0;
WARN("%s: unexpected end of section", sec->name);
return 1;
}
+
+ insn = next_insn;
}
return 0;
Patches currently in stable-queue which might be from jpoimboe@redhat.com are
queue-4.14/objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.patch
queue-4.14/x86-cpufeatures-re-tabulate-the-x86_feature-definitions.patch
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2017-12-20 15:14 Patch "objtool: Don't report end of section error after an empty unwind hint" has been added to the 4.14-stable tree gregkh
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