diff options
author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-12-07 14:31:33 +0100 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2016-12-07 14:36:21 +0100 |
commit | b18cc3de00ec3442cf40ac60787dbe0703b99e24 (patch) | |
tree | 70db9244d8ecf7126726510af587e65b4eae4574 /mm | |
parent | 1f759d328f6d8c06b5db55374b028565187deaca (diff) | |
download | linux-b18cc3de00ec3442cf40ac60787dbe0703b99e24.tar.bz2 |
tracing/rb: Init the CPU mask on allocation
Before commit b32614c03413 ("tracing/rb: Convert to hotplug state machine")
the allocated cpumask was initialized to the mask of online or possible
CPUs. After the CPU hotplug changes the buffer initialization moved to
trace_rb_cpu_prepare() but the cpumask is allocated with alloc_cpumask()
and therefor has random content. As a consequence the cpu buffers are not
initialized and a later access dereferences a NULL pointer.
Use zalloc_cpumask() instead so trace_rb_cpu_prepare() initializes the
buffers properly.
Fixes: b32614c03413 ("tracing/rb: Convert to hotplug state machine")
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: rostedt@goodmis.org
Link: http://lkml.kernel.org/r/20161207133133.hzkcqfllxcdi3joz@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions