Yue and Xingwei reported a syzkaller crash related to the rdpmc attribute
file and jump labels. It turns out to be lack of serialization in the
attribute write path and non-robustness on the jump label side.

The following series addresses these issues.

Thanks,

	tglx
---
 arch/x86/events/core.c |    3 ++
 kernel/jump_label.c    |   67 ++++++++++++++++++++++++++++---------------------
 2 files changed, 42 insertions(+), 28 deletions(-)