From 0bd476e6c67190b5eb7b6e105c8db8ff61103281 Mon Sep 17 00:00:00 2001 From: Will Deacon <will@kernel.org> Date: Mon, 6 Apr 2020 20:11:43 -0700 Subject: [PATCH] kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() 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(). Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by: Quentin Perret <qperret@google.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Petr Mladek <pmladek@suse.com> Cc: Joe Lawrence <joe.lawrence@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: http://lkml.kernel.org/r/20200221114404.14641-4-will@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- kernel/kallsyms.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index a9b3f660dee7b..16c8c605f4b0f 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, -- GitLab