Commit 70ed0706 authored by Alexei Starovoitov's avatar Alexei Starovoitov
Browse files

bpf: disable preemption for bpf progs attached to uprobe 



trace_call_bpf() no longer disables preemption on its own.
All callers of this function has to do it explicitly.

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 1b7a51a6

kernel/trace/trace_uprobe.c

+9 −2
Original line number Diff line number Diff line
@@ -1333,8 +1333,15 @@ static void __uprobe_perf_func(struct trace_uprobe *tu, 
	int size, esize;

	int rctx;



	if (bpf_prog_array_valid(call) && !trace_call_bpf(call, regs))

	if (bpf_prog_array_valid(call)) {

		u32 ret;



		preempt_disable();

		ret = trace_call_bpf(call, regs);

		preempt_enable();

		if (!ret)

			return;

	}



	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));

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