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Message-ID: <20190730142804.GA1622@linux.intel.com>
Date: Tue, 30 Jul 2019 07:28:05 -0700
From: Sean Christopherson <sean.j.christopherson@...el.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
Andy Lutomirski <luto@...nel.org>,
Vincenzo Frascino <vincenzo.frascino@....com>,
Kees Cook <keescook@...omium.org>,
Paul Bolle <pebolle@...cali.nl>, Will Deacon <will@...nel.org>
Subject: Re: [patch V2 3/5] lib/vdso/32: Provide legacy syscall fallbacks
On Tue, Jul 30, 2019 at 11:38:50AM +0200, Thomas Gleixner wrote:
> To address the regression which causes seccomp to deny applications the
> access to clock_gettime64() and clock_getres64() syscalls because they
> are not enabled in the existing filters.
>
> That trips over the fact that 32bit VDSOs use the new clock_gettime64() and
> clock_getres64() syscalls in the fallback path.
>
> Add a conditional to invoke the 32bit legacy fallback syscalls instead of
> the new 64bit variants. The conditional can go away once all architectures
> are converted.
>
> Fixes: 00b26474c2f1 ("lib/vdso: Provide generic VDSO implementation")
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> ---
Reviewed-and-tested-by: Sean Christopherson <sean.j.christopherson@...el.com>
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