linux-kernel - Re: [PATCH v2 3/8] mips: compat: vdso: Use legacy syscalls as fallback

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Message-ID: <MWHPR2201MB1277ED2AD21C031201F749EAC1B90@MWHPR2201MB1277.namprd22.prod.outlook.com>
Date:   Tue, 3 Sep 2019 21:00:57 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     Vincenzo Frascino <vincenzo.frascino@....com>
CC:     "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        Paul Burton <pburton@...ecomp.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "salyzyn@...roid.com" <salyzyn@...roid.com>,
        "0x7f454c46@...il.com" <0x7f454c46@...il.com>,
        "luto@...nel.org" <luto@...nel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH v2 3/8] mips: compat: vdso: Use legacy syscalls as
 fallback

Hello,

Vincenzo Frascino wrote:
> The generic VDSO implementation uses the Y2038 safe clock_gettime64() and
> clock_getres_time64() syscalls as fallback for 32bit VDSO. This breaks
> seccomp setups because these syscalls might be not (yet) allowed.
> 
> Implement the 32bit variants which use the legacy syscalls and select the
> variant in the core library.
> 
> The 64bit time variants are not removed because they are required for the
> time64 based vdso accessors.

Applied to mips-next.

> commit 932bb934ed4d
> https://git.kernel.org/mips/c/932bb934ed4d
> 
> Fixes: 00b26474c2f1 ("lib/vdso: Provide generic VDSO implementation")
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
> Signed-off-by: Paul Burton <paul.burton@...s.com>

Thanks,
    Paul

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