• Thomas Gleixner's avatar
    time: Prevent 32 bit overflow with set_normalized_timespec() · 12e09337
    Thomas Gleixner authored
    set_normalized_timespec() nsec argument is of type long. The recent
    timekeeping changes of ktime_get_ts() feed 
    
    	ts->tv_nsec + tomono.tv_nsec + nsecs
    
    to set_normalized_timespec(). On 32 bit machines that sum can be
    larger than (1 << 31) and therefor result in a negative value which
    screws up the result completely.
    
    Make the nsec argument of set_normalized_timespec() s64 to fix the
    problem at hand. This also prevents similar problems for future users
    of set_normalized_timespec().
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Tested-by: default avatarCarsten Emde <carsten.emde@osadl.org>
    LKML-Reference: <new-submission>
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Cc: John Stultz <johnstul@us.ibm.com>
    12e09337
time.h 7.49 KB