diff options
| author | Andrea Righi <righi.andrea@gmail.com> | 2019-02-13 01:15:34 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-05 22:31:33 +0200 |
| commit | e62824d1f8a920c96dd387a04a1de8b98013d46a (patch) | |
| tree | 62e81d983098aba8e8a1688ebd4d8d506bacedcd /lib | |
| parent | 67dcd5d73fc92a2a76dfc90331e64a52f8b6f01b (diff) | |
kprobes: Prohibit probing on bsearch()
[ Upstream commit 02106f883cd745523f7766d90a739f983f19e650 ]
Since kprobe breakpoing handler is using bsearch(), probing on this
routine can cause recursive breakpoint problem.
int3
->do_int3()
->ftrace_int3_handler()
->ftrace_location()
->ftrace_location_range()
->bsearch() -> int3
Prohibit probing on bsearch().
Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.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/154998813406.31052.8791425358974650922.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/bsearch.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/bsearch.c b/lib/bsearch.c index 18b445b010c3..82512fe7b33c 100644 --- a/lib/bsearch.c +++ b/lib/bsearch.c @@ -11,6 +11,7 @@ #include <linux/export.h> #include <linux/bsearch.h> +#include <linux/kprobes.h> /* * bsearch - binary search an array of elements @@ -53,3 +54,4 @@ void *bsearch(const void *key, const void *base, size_t num, size_t size, return NULL; } EXPORT_SYMBOL(bsearch); +NOKPROBE_SYMBOL(bsearch); |