kprobes: Prohibit probing on preemption checking debug functions
authorMasami Hiramatsu <mhiramat@kernel.org>
Tue, 12 Feb 2019 16:14:09 +0000 (01:14 +0900)
committerIngo Molnar <mingo@kernel.org>
Wed, 13 Feb 2019 07:16:40 +0000 (08:16 +0100)
commit984640ce427fa67c7c1f8550ab53495733bd11fc
tree41cc092618c53dcf2a7b9ea75de0b33f905e78c6
parenteeeb080bae906a57b6513d37efe3c38f2cb87a1c
kprobes: Prohibit probing on preemption checking debug functions

Since kprobes depends on preempt disable/enable, probing
on the preempt debug routines can cause recursive breakpoint
bugs.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrea Righi <righi.andrea@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/154998804911.31052.3541963527929117920.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
lib/smp_processor_id.c