[PATCH v2 2/2] livepatch: Use static buffer for debugging messages under rq lock

[Petr Mladek]

klp_try_switch_task() is called under klp_mutex. The buffer for
debugging messages might be static.

Signed-off-by: Petr Mladek <pmla...@suse.com>
---
 kernel/livepatch/transition.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c
index 8e0274075e75..d66086fd6d75 100644
--- a/kernel/livepatch/transition.c
+++ b/kernel/livepatch/transition.c
@@ -304,11 +304,11 @@ static int klp_check_stack(struct task_struct *task, char 
*err_buf)
  */
 static bool klp_try_switch_task(struct task_struct *task)
 {
+       static char err_buf[STACK_ERR_BUF_SIZE];
        struct rq *rq;
        struct rq_flags flags;
        int ret;
        bool success = false;
-       char err_buf[STACK_ERR_BUF_SIZE];
 
        err_buf[0] = '\0';
 
@@ -351,7 +351,6 @@ static bool klp_try_switch_task(struct task_struct *task)
                pr_debug("%s", err_buf);
 
        return success;
-
 }
 
 /*
-- 
2.16.4