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Date: Fri, 2 Feb 2018 15:56:17 +0100
From: Arnd Bergmann <arnd@...db.de>
To: x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Nicolas Pitre <nico@...aro.org>, Andi Kleen <ak@...ux.intel.com>,
linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
Borislav Petkov <bpetkov@...e.de>,
Andy Lutomirski <luto@...nel.org>,
Vlastimil Babka <vbabka@...e.cz>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 1/3] x86: dumpstack: avoid uninitlized variable
In some configurations, 'partial' does not get initialized,
as shown by this gcc-8 warning:
arch/x86/kernel/dumpstack.c: In function 'show_trace_log_lvl':
arch/x86/kernel/dumpstack.c:156:4: error: 'partial' may be used uninitialized in this function [-Werror=maybe-uninitialized]
show_regs_if_on_stack(&stack_info, regs, partial);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This initializes it to false, to get the previous behavior in
this case.
a9cdbe72c4e8 ("x86/dumpstack: Fix partial register dumps")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/x86/kernel/dumpstack.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index afbecff161d1..a2d8a3908670 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -109,7 +109,7 @@ void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
struct stack_info stack_info = {0};
unsigned long visit_mask = 0;
int graph_idx = 0;
- bool partial;
+ bool partial = false;
printk("%sCall Trace:\n", log_lvl);
--
2.9.0
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