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author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-02-13 01:14:37 +0900 |
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committer | Ingo Molnar <mingo@kernel.org> | 2019-02-13 08:16:40 +0100 |
commit | a39f15b9644fac3f950f522c39e667c3af25c588 (patch) | |
tree | cf7d2f958d62cae723b92904dfd2a6605cac6ef7 /kernel/rcu | |
parent | 984640ce427fa67c7c1f8550ab53495733bd11fc (diff) | |
download | linux-a39f15b9644fac3f950f522c39e667c3af25c588.tar.gz |
kprobes: Prohibit probing on RCU debug routine
Since kprobe itself depends on RCU, probing on RCU debug routine can cause recursive breakpoint bugs. Prohibit probing on RCU debug routines. int3 ->do_int3() ->ist_enter() ->RCU_LOCKDEP_WARN() ->debug_lockdep_rcu_enabled() -> int3 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/154998807741.31052.11229157537816341591.stgit@devbox Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/rcu')
-rw-r--r-- | kernel/rcu/update.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index 1971869c4072..f4ca36d92138 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -52,6 +52,7 @@ #include <linux/tick.h> #include <linux/rcupdate_wait.h> #include <linux/sched/isolation.h> +#include <linux/kprobes.h> #define CREATE_TRACE_POINTS @@ -249,6 +250,7 @@ int notrace debug_lockdep_rcu_enabled(void) current->lockdep_recursion == 0; } EXPORT_SYMBOL_GPL(debug_lockdep_rcu_enabled); +NOKPROBE_SYMBOL(debug_lockdep_rcu_enabled); /** * rcu_read_lock_held() - might we be in RCU read-side critical section? |