This is a note to let you know that I've just added the patch titled
objtool: is_fentry_call() crashes if call has no destination
to the 5.4-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-is_fentry_call-crashes-if-call-has-no-destination.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 87cf61fe848ca8ddf091548671e168f52e8a718e Mon Sep 17 00:00:00 2001
From: Alexandre Chartre <alexandre.chartre@xxxxxxxxxx>
Date: Tue, 14 Apr 2020 12:36:10 +0200
Subject: objtool: is_fentry_call() crashes if call has no destination
From: Alexandre Chartre <alexandre.chartre@xxxxxxxxxx>
commit 87cf61fe848ca8ddf091548671e168f52e8a718e upstream.
Fix is_fentry_call() so that it works if a call has no destination
set (call_dest). This needs to be done in order to support intra-
function calls.
Signed-off-by: Alexandre Chartre <alexandre.chartre@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Miroslav Benes <mbenes@xxxxxxx>
Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200414103618.12657-2-alexandre.chartre@xxxxxxxxxx
Signed-off-by: Rui Qi <qirui.001@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/objtool/check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1367,7 +1367,7 @@ static int decode_sections(struct objtoo
static bool is_fentry_call(struct instruction *insn)
{
- if (insn->type == INSN_CALL &&
+ if (insn->type == INSN_CALL && insn->call_dest &&
insn->call_dest->type == STT_NOTYPE &&
!strcmp(insn->call_dest->name, "__fentry__"))
return true;
Patches currently in stable-queue which might be from alexandre.chartre@xxxxxxxxxx are
queue-5.4/x86-speculation-support-intra-function-call-validation.patch
queue-5.4/objtool-add-support-for-intra-function-calls.patch
queue-5.4/objtool-is_fentry_call-crashes-if-call-has-no-destination.patch
