Messages in this thread Patch in this message | | | From | Will Deacon <> | Subject | [PATCH 3/3] kallsyms: Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() | Date | Fri, 21 Feb 2020 11:44:04 +0000 |
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kallsyms_lookup_name() and kallsyms_on_each_symbol() are exported to modules despite having no in-tree users and being wide open to abuse by out-of-tree modules that can use them as a method to invoke arbitrary non-exported kernel functions.
Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol().
Cc: Alexei Starovoitov <ast@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Quentin Perret <qperret@google.com> Signed-off-by: Will Deacon <will@kernel.org> --- kernel/kallsyms.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index a9b3f660dee7..16c8c605f4b0 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -175,7 +175,6 @@ unsigned long kallsyms_lookup_name(const char *name) } return module_kallsyms_lookup_name(name); } -EXPORT_SYMBOL_GPL(kallsyms_lookup_name); int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, unsigned long), @@ -194,7 +193,6 @@ int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, } return module_kallsyms_on_each_symbol(fn, data); } -EXPORT_SYMBOL_GPL(kallsyms_on_each_symbol); static unsigned long get_symbol_pos(unsigned long addr, unsigned long *symbolsize, -- 2.25.0.265.gbab2e86ba0-goog
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