Messages in this thread | | | From | Dan Williams <> | Date | Wed, 7 Mar 2018 10:13:48 -0800 | Subject | Re: [PATCH V2] posix-timers: Protect posix clock array access against speculation |
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On Thu, Feb 15, 2018 at 9:01 AM, Peter Zijlstra <peterz@infradead.org> wrote: > On Thu, Feb 15, 2018 at 05:21:55PM +0100, Thomas Gleixner wrote: >> The clockid argument of clockid_to_kclock() comes straight from user space >> via various syscalls and is used as index into the posix_clocks array. >> >> Protect it against spectre v1 array out of bounds speculation. Remove the >> redundant check for !posix_clock[id] as this is another source for >> speculation and does not provide any advantage over the return >> posix_clock[id] path which returns NULL in that case anyway. >> >> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> >> Cc: stable@vger.kernel.org > > Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> >
Curious where this ended up, I don't see it on tip/master. In any event:
Acked-by: Dan Williams <dan.j.williams@intel.com>
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