kprobes: Mark ftrace mcount handler functions nokprobe

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commit fabe38ab6b upstream.

Mark ftrace mcount handler functions nokprobe since
probing on these functions with kretprobe pushes
return address incorrectly on kretprobe shadow stack.

Reported-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Tested-by: Andrea Righi <righi.andrea@gmail.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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/155094062044.6137.6419622920568680640.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bwh: Backported to 3.16: there is no ftrace_ops_assist_func()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

This commit is contained in:

Masami Hiramatsu 2019-02-24 01:50:20 +09:00 • committed by Ben Hutchings

parent 2b487afcd0

commit 51d68a4c8e

1 changed files with 4 additions and 1 deletions

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kernel/trace/ftrace.c

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