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    Subject[PATCH 113/190] Revert "x86/hpet: Prevent potential NULL pointer dereference"
    Date
    This reverts commit 2e84f116afca3719c9d0a1a78b47b48f75fd5724.

    Commits from @umn.edu addresses have been found to be submitted in "bad
    faith" to try to test the kernel community's ability to review "known
    malicious" changes. The result of these submissions can be found in a
    paper published at the 42nd IEEE Symposium on Security and Privacy
    entitled, "Open Source Insecurity: Stealthily Introducing
    Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
    of Minnesota) and Kangjie Lu (University of Minnesota).

    Because of this, all submissions from this group must be reverted from
    the kernel tree and will need to be re-reviewed again to determine if
    they actually are a valid fix. Until that work is complete, remove this
    change to ensure that no problems are being introduced into the
    codebase.

    Cc: Aditya Pakki <pakki001@umn.edu>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: kjlu@umn.edu
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Joe Perches <joe@perches.com>
    Cc: Nicolai Stange <nstange@suse.de>
    Cc: Roland Dreier <roland@purestorage.com>
    Cc: https
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    arch/x86/kernel/hpet.c | 2 --
    1 file changed, 2 deletions(-)

    diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
    index 08651a4e6aa0..0515a97bf6f5 100644
    --- a/arch/x86/kernel/hpet.c
    +++ b/arch/x86/kernel/hpet.c
    @@ -930,8 +930,6 @@ int __init hpet_enable(void)
    return 0;

    hpet_set_mapping();
    - if (!hpet_virt_address)
    - return 0;

    /* Validate that the config register is working */
    if (!hpet_cfg_working())
    --
    2.31.1
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