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authorMasami Hiramatsu <mhiramat@kernel.org>2019-06-03 16:04:42 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-07-16 22:13:45 +0300
commit65fc965c708c90b8c8b2cea980db0618333dd7fe (patch)
tree38b64d0ea1a67e1bde1328cf938e9d0070e62f5e /kernel/kprobes.c
parentf0553dcb9778c343641d3a41f1db01be02e7551b (diff)
downloadlinux-65fc965c708c90b8c8b2cea980db0618333dd7fe.tar.xz
kprobes: Fix to init kprobes in subsys_initcall
Since arm64 kernel initializes breakpoint trap vector in arch_initcall(), initializing kprobe (and run smoke test) in postcore_initcall() causes a kernel panic. To fix this issue, move the kprobe initialization in subsys_initcall() (which is called right afer the arch_initcall). In-kernel kprobe users (ftrace and bpf) are using fs_initcall() which is called after subsys_initcall(), so this shouldn't cause more problem. Link: http://lkml.kernel.org/r/155956708268.12228.10363800793132214198.stgit@devnote2 Link: http://lkml.kernel.org/r/20190709153755.GB10123@lakrids.cambridge.arm.com Reported-by: Anders Roxell <anders.roxell@linaro.org> Fixes: b5f8b32c93b2 ("kprobes: Initialize kprobes at postcore_initcall") Tested-by: Anders Roxell <anders.roxell@linaro.org> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r--kernel/kprobes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 54aaaad00a47..5471efbeb937 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -2289,7 +2289,7 @@ static int __init init_kprobes(void)
init_test_probes();
return err;
}
-postcore_initcall(init_kprobes);
+subsys_initcall(init_kprobes);
#ifdef CONFIG_DEBUG_FS
static void report_probe(struct seq_file *pi, struct kprobe *p,