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Subject[PATCH tip/core/rcu 15/17] Prevent uninitialized string in RCU stall info
Date
From: Carsten Emde <C.Emde@osadl.org>

An uninitialized string may be displayed at the end of the rcu_preempt
detected stall info such as

0: (1 GPs behind) idle=075/140000000000000/0 =8?^D=8?^D
^^^^^^^^^^
if CONFIG_RCU_FAST_NO_HZ is not defined.

This trivial patch clears the string in this case.

Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
kernel/rcutree_plugin.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index d806186..321ba89 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -2205,6 +2205,7 @@ static void print_cpu_stall_fast_no_hz(char *cp, int cpu)

static void print_cpu_stall_fast_no_hz(char *cp, int cpu)
{
+ *cp = '\0';
}

#endif /* #else #ifdef CONFIG_RCU_FAST_NO_HZ */
--
1.7.8


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