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    Subject[PATCH 2.4] lcd: Add checks to CAP_SYS_ADMIN to potentially dangerous ioctl's
    Date
    This patch adds CAP_SYS_ADMIN checks to the potentially dangerous ioctls FLASH_Erase and FLASH_Burn
    in the Cobalt LCD interface driver.

    Signed-off-by: James Nelson <james4765@gmail.com>

    diff -purN --exclude='*~' linux-2.4.29-original/drivers/char/lcd.c linux-2.4.29/drivers/char/lcd.c
    --- linux-2.4.29-original/drivers/char/lcd.c 2005-01-27 18:46:42.085690494 -0500
    +++ linux-2.4.29/drivers/char/lcd.c 2005-01-27 18:54:00.902766505 -0500
    @@ -386,6 +386,8 @@ static int lcd_ioctl(struct inode *inode

    int ctr=0;

    + if (!capable(CAP_SYS_ADMIN)) return -EPERM;
    +
    // Chip Erase Sequence
    WRITE_FLASH( kFlash_Addr1, kFlash_Data1 );
    WRITE_FLASH( kFlash_Addr2, kFlash_Data2 );
    @@ -422,6 +424,8 @@ static int lcd_ioctl(struct inode *inode

    struct lcd_display display;

    + if (!capable(CAP_SYS_ADMIN)) return -EPERM;
    +
    if(copy_from_user(&display, (struct lcd_display*)arg, sizeof(struct lcd_display)))
    return -EFAULT;
    rom = (unsigned char *) kmalloc((128),GFP_ATOMIC);
    -
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