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kprobes: Prohibit probing on bsearch()
[ Upstream commit 02106f883c
]
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>
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1 changed files with 2 additions and 0 deletions
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@ -11,6 +11,7 @@
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#include <linux/export.h>
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#include <linux/bsearch.h>
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#include <linux/kprobes.h>
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/*
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* bsearch - binary search an array of elements
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@ -53,3 +54,4 @@ void *bsearch(const void *key, const void *base, size_t num, size_t size,
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return NULL;
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}
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EXPORT_SYMBOL(bsearch);
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NOKPROBE_SYMBOL(bsearch);
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