ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 20:51:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

kprobes: Prohibit probing on hardirq tracers

Browse Source 
Since kprobes breakpoint handling involves hardirq tracer,
probing these functions cause breakpoint recursion problem.

Prohibit probing on those functions.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.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: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/154998802073.31052.17255044712514564153.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Masami Hiramatsu
2019-02-13 01:13:40 +09:00
committed by Ingo Molnar
parent 6143c6fb1e
commit eeeb080bae
2 changed files with 12 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
kernel/trace/trace_preemptirq.c
View File

@@ -9,6 +9,7 @@
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/ftrace.h>
#include <linux/kprobes.h>
#include "trace.h"
#define CREATE_TRACE_POINTS
@@ -30,6 +31,7 @@ void trace_hardirqs_on(void)
lockdep_hardirqs_on(CALLER_ADDR0);
}
EXPORT_SYMBOL(trace_hardirqs_on);
NOKPROBE_SYMBOL(trace_hardirqs_on);
void trace_hardirqs_off(void)
{
@@ -43,6 +45,7 @@ void trace_hardirqs_off(void)
lockdep_hardirqs_off(CALLER_ADDR0);
}
EXPORT_SYMBOL(trace_hardirqs_off);
NOKPROBE_SYMBOL(trace_hardirqs_off);
__visible void trace_hardirqs_on_caller(unsigned long caller_addr)
{
@@ -56,6 +59,7 @@ __visible void trace_hardirqs_on_caller(unsigned long caller_addr)
lockdep_hardirqs_on(CALLER_ADDR0);
}
EXPORT_SYMBOL(trace_hardirqs_on_caller);
NOKPROBE_SYMBOL(trace_hardirqs_on_caller);
__visible void trace_hardirqs_off_caller(unsigned long caller_addr)
{
@@ -69,6 +73,7 @@ __visible void trace_hardirqs_off_caller(unsigned long caller_addr)
lockdep_hardirqs_off(CALLER_ADDR0);
}
EXPORT_SYMBOL(trace_hardirqs_off_caller);
NOKPROBE_SYMBOL(trace_hardirqs_off_caller);
#endif /* CONFIG_TRACE_IRQFLAGS */
#ifdef CONFIG_TRACE_PREEMPT_TOGGLE