4.14-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
[ Upstream commit ebfc15019cfa72496c674ffcb0b8ef10790dcddc ]
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.
Fixes: a9cdbe72c4e8 ("x86/dumpstack: Fix partial register dumps") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Andi Kleen ak@linux.intel.com Cc: Nicolas Pitre nico@linaro.org Cc: Peter Zijlstra peterz@infradead.org Cc: Dave Hansen dave.hansen@linux.intel.com Cc: Andy Lutomirski luto@kernel.org Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Borislav Petkov bpetkov@suse.de Cc: Vlastimil Babka vbabka@suse.cz Link: https://lkml.kernel.org/r/20180202145634.200291-1-arnd@arndb.de Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/kernel/dumpstack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c @@ -109,7 +109,7 @@ void show_trace_log_lvl(struct task_stru 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);