From: Oren Laadan <orenl@xxxxxxxxxxxxxxx>
One may not call task_pid_vnr() on dead tasks because they don't have
a valid ->nxproxy pointer. However, the ckpt_ctx cleanup may be called
by a dead task from do_exit(), in the case of zombie or "ghost" tasks.
This patch makes ckpt_debug() safe to call from dead tasks context, so
that debug printing from code called by ckpt_ctx_free() is cool.
Signed-off-by: Oren Laadan <orenl@xxxxxxxxxxxxxxx>
---
include/linux/checkpoint.h | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/include/linux/checkpoint.h b/include/linux/checkpoint.h
index e00dd70..5294a96 100644
--- a/include/linux/checkpoint.h
+++ b/include/linux/checkpoint.h
@@ -334,7 +334,9 @@ extern unsigned long ckpt_debug_level;
do { \
if (ckpt_debug_level & (level)) \
printk(KERN_DEBUG "[%d:%d:c/r:%s:%d] " fmt, \
- current->pid, task_pid_vnr(current), \
+ current->pid, \
+ current->nsproxy ? \
+ task_pid_vnr(current) : -1, \
__func__, __LINE__, ## args); \
} while (0)
--
1.6.0.4
_______________________________________________
Containers mailing list
Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linux-foundation.org/mailman/listinfo/containers
