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FROMGIT: kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()

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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().

Bug: 149978696
Change-Id: I8f3c1b5222939c46901f4d149d4c7bb63916ff04
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Reviewed-by: Masami Hiramatsu <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Quentin Perret <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: K.Prasad <[email protected]>
Cc: Miroslav Benes <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Joe Lawrence <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
(cherry picked from commit ab3e66797c7fddbf80fbba31c5bf4574ad52f320
 https://github.com/hnaz/linux-mm.git master)
Signed-off-by: Quentin Perret <[email protected]>
This commit is contained in:
Will Deacon 2020-03-10 05:03:31 +00:00 • committed by Quentin Perret
commit 6a3acdbcc7
1 changed files with 0 additions and 2 deletions
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2
kernel/kallsyms.c
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@ -174,7 +174,6 @@ 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),
@ -193,7 +192,6 @@ 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,