diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-02-13 01:15:05 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-02-13 08:16:41 +0100 |
| commit | 2f43c6022d84b2f562623a7023f49f1431e50747 (patch) | |
| tree | a8bd5af391215c7da87d93a4eafbe6d0da4f98e4 /kernel/locking/lockdep.c | |
| parent | a39f15b9644fac3f950f522c39e667c3af25c588 (diff) | |
kprobes: Prohibit probing on lockdep functions
Some lockdep functions can be involved in breakpoint handling
and probing on those functions can cause a breakpoint recursion.
Prohibit probing on those functions by blacklist.
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/154998810578.31052.1680977921449292812.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking/lockdep.c')
| -rw-r--r-- | kernel/locking/lockdep.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 95932333a48b..bc35a54ae3d4 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -50,6 +50,7 @@ #include <linux/random.h> #include <linux/jhash.h> #include <linux/nmi.h> +#include <linux/kprobes.h> #include <asm/sections.h> @@ -2814,6 +2815,7 @@ void lockdep_hardirqs_on(unsigned long ip) __trace_hardirqs_on_caller(ip); current->lockdep_recursion = 0; } +NOKPROBE_SYMBOL(lockdep_hardirqs_on); /* * Hardirqs were disabled: @@ -2843,6 +2845,7 @@ void lockdep_hardirqs_off(unsigned long ip) } else debug_atomic_inc(redundant_hardirqs_off); } +NOKPROBE_SYMBOL(lockdep_hardirqs_off); /* * Softirqs will be enabled: @@ -3650,7 +3653,8 @@ __lock_release(struct lockdep_map *lock, int nested, unsigned long ip) return 0; } -static int __lock_is_held(const struct lockdep_map *lock, int read) +static nokprobe_inline +int __lock_is_held(const struct lockdep_map *lock, int read) { struct task_struct *curr = current; int i; @@ -3883,6 +3887,7 @@ int lock_is_held_type(const struct lockdep_map *lock, int read) return ret; } EXPORT_SYMBOL_GPL(lock_is_held_type); +NOKPROBE_SYMBOL(lock_is_held_type); struct pin_cookie lock_pin_lock(struct lockdep_map *lock) { |