]> git.ipfire.org Git - people/arne_f/kernel.git/commit
tracing/kprobes: Do the notrace functions check without kprobes on ftrace
authorMasami Hiramatsu <mhiramat@kernel.org>
Fri, 8 Jan 2021 04:19:38 +0000 (13:19 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 19 Jan 2021 17:26:12 +0000 (18:26 +0100)
commitaeb64ef1f4297cfeb7507a7c57061d03584c8963
tree6d19b51669dc0b145694e30d0b20e1d0eea06528
parent984f57e4258c08442595365ee4a7a65b9cbfb68b
tracing/kprobes: Do the notrace functions check without kprobes on ftrace

commit 7bb83f6fc4ee84e95d0ac0d14452c2619fb3fe70 upstream.

Enable the notrace function check on the architecture which doesn't
support kprobes on ftrace but support dynamic ftrace. This notrace
function check is not only for the kprobes on ftrace but also
sw-breakpoint based kprobes.
Thus there is no reason to limit this check for the arch which
supports kprobes on ftrace.

This also changes the dependency of Kconfig. Because kprobe event
uses the function tracer's address list for identifying notrace
function, if the CONFIG_DYNAMIC_FTRACE=n, it can not check whether
the target function is notrace or not.

Link: https://lkml.kernel.org/r/20210105065730.2634785-1-naveen.n.rao@linux.vnet.ibm.com
Link: https://lkml.kernel.org/r/161007957862.114704.4512260007555399463.stgit@devnote2
Cc: stable@vger.kernel.org
Fixes: 45408c4f92506 ("tracing: kprobes: Prohibit probing on notrace function")
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/trace/Kconfig
kernel/trace/trace_kprobe.c