Messages in this thread | | | Date | Tue, 22 Oct 2019 05:30:51 +0100 | From | Al Viro <> | Subject | Re: [Y2038] [PATCH v6 10/43] compat_ioctl: move rtc handling into rtc-dev.c |
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On Thu, Oct 17, 2019 at 04:33:09PM +0200, Arnd Bergmann wrote:
> However, looking at this again after your comment I found a rather > more serious bug in my new RTC_IRQP_SET handling: Any 64-bit > machine can now bypass the permission check for RTC_IRQP_SET by > calling RTC_IRQP_SET32 instead.
You've lost the check on RTC_EPOCH_SET as well.
Another potential issue is drivers/input/misc/hp_sdc_rtc.c, provided that the hardware in question might possibly exist on hppa64 boxen - CONFIG_GSC defaults to y and it's not 32bit-only, so that thing is at least selectable on 64bit kernels.
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