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    Subject[PATCH] kernel: make /proc/kallsyms mode 400 to reduce ease of attacking

    Hi,

    Making /proc/kallsyms readable only for root makes it harder
    for attackers to write generic kernel exploits by removing
    one source of knowledge where things are in the kernel.

    Signed-off-by: Marcus Meissner <meissner@suse.de>
    ---
    kernel/kallsyms.c | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
    index 6f6d091..a8db257 100644
    --- a/kernel/kallsyms.c
    +++ b/kernel/kallsyms.c
    @@ -546,7 +546,7 @@ static const struct file_operations kallsyms_operations = {

    static int __init kallsyms_init(void)
    {
    - proc_create("kallsyms", 0444, NULL, &kallsyms_operations);
    + proc_create("kallsyms", 0400, NULL, &kallsyms_operations);
    return 0;
    }
    device_initcall(kallsyms_init);
    --
    1.7.1


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