Messages in this thread | | | Date | Mon, 14 Jan 2019 11:16:57 -0500 | From | Steven Rostedt <> | Subject | Re: [PATCH v2 5/9] kprobes: Search non-suffixed symbol in blacklist |
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On Sat, 12 Jan 2019 11:28:02 +0900 Masami Hiramatsu <mhiramat@kernel.org> wrote:
> Newer gcc can generate some different instances of a function > with suffixed symbols if the function is optimized and only > has a part of that. (e.g. .constprop, .part etc.) > > In this case, it is not enough to check the entry of kprobe > blacklist because it only records non-suffixed symbol address. > > To fix this issue, search non-suffixed symbol in blacklist if > given address is within a symbol which has a suffix. > > Note that this can cause false positive cases if a kprobe-safe > function is optimized to suffixed instance and has same name > symbol which is blacklisted. > But I would like to chose a fail-safe design for this issue. > > Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
-- Steve
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