diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-10-20 18:47:53 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-10-22 03:31:01 +0200 |
| commit | 2e62024c265aa69315ed02835623740030435380 (patch) | |
| tree | 365d4638504642c2ed30f261c0cd2f8bcf62e835 /drivers | |
| parent | c2712b858187f5bcd7b042fe4daa3ba3a12635c0 (diff) | |
kprobes/x86: Use preempt_enable() in optimized_callback()
The following commit:
a19b2e3d7839 ("kprobes/x86: Remove IRQ disabling from ftrace-based/optimized kprobes”)
removed local_irq_save/restore() from optimized_callback(), the handler
might be interrupted by the rescheduling interrupt and might be
rescheduled - so we must not use the preempt_enable_no_resched() macro.
Use preempt_enable() instead, to not lose preemption events.
[ mingo: Improved the changelog. ]
Reported-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dwmw@amazon.co.uk
Fixes: a19b2e3d7839 ("kprobes/x86: Remove IRQ disabling from ftrace-based/optimized kprobes”)
Link: http://lkml.kernel.org/r/154002887331.7627.10194920925792947001.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions