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authorThomas Gleixner <tglx@linutronix.de>2017-06-20 17:37:36 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-20 21:33:56 +0200
commit098b0e01a91c42aaaf0425605cd126b03fcb0bcf (patch)
treed936fa77c10117b58f5a47f789745bc88b093c75 /drivers/net/can/mscan/Makefile
parentitimer: Make timeval to nsec conversion range limited (diff)
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posix-cpu-timers: Make timespec to nsec conversion safe
The expiry time of a posix cpu timer is supplied through sys_timer_set() via a struct timespec. The timespec is validated for correctness. In the actual set timer implementation the timespec is converted to a scalar nanoseconds value. If the tv_sec part of the time spec is large enough the conversion to nanoseconds (sec * NSEC_PER_SEC) overflows 64bit. Mitigate that by using the timespec_to_ktime() conversion function, which checks the tv_sec part for a potential mult overflow and clamps the result to KTIME_MAX, which is about 292 years. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20170620154113.588276707@linutronix.de
Diffstat (limited to 'drivers/net/can/mscan/Makefile')
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