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From: Zack Weinberg <zackw-VmQCmMdMyN0AvxtiuMwx3w@public.gmane.org>
To: Rich Felker <dalias-8zAoT0mYgF4@public.gmane.org>
Cc: "H.J. Lu" <hjl.tools-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"Michael Kerrisk (man-pages)"
	<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	libc-alpha <libc-alpha-9JcytcrH/bA+uJoB2kUjGw@public.gmane.org>,
	linux-man <linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: The time(2) man page conflicts with glibc
Date: Wed, 16 Dec 2015 17:27:03 -0500	[thread overview]
Message-ID: <CAKCAbMhks8iRT6kMYUZcLRi8Y8Xj3C55OnC_yjpOdG0j4M+V-Q@mail.gmail.com> (raw)
In-Reply-To: <20151216215955.GJ238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>

On Wed, Dec 16, 2015 at 4:59 PM, Rich Felker <dalias-8zAoT0mYgF4@public.gmane.org> wrote:
>> > Programs could also be calling the syscall directly (using syscall()
>> > or asm) and using it as a (very cheap, fail-safe) way to verify that
>> > an address is writable before attempting to write to it. Breaking this
>> > would be a kernel API regression. However the library function time()
>> > has UB for invalid pointers and no obligation to support them.
>>
>> sure, but that still doesn't mean the kernel should be sending SEGV.
>> which is what this subthread was about.
>
> The kernel is not causing SIGSEGV as far as I can tell; it's purely
> the library function time that's causing this.

... Do you consider the vDSO to be part of the kernel, or part of the C library?
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  parent reply	other threads:[~2015-12-16 22:27 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-15 13:58 The time(2) man page conflicts with glibc H.J. Lu
2015-12-15 14:14 ` Zack Weinberg
     [not found]   ` <CAKCAbMj-X+wLKX3=MDm9z3L9zyikemxCNggu2bfw6=o6K5PGgg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 14:31     ` Andreas Schwab
2015-12-15 14:55     ` Mike Frysinger
     [not found]       ` <20151215145517.GR11489-UgUKS2FnFs9+urZeOPWqwQ@public.gmane.org>
2015-12-15 15:19         ` Zack Weinberg
     [not found]           ` <CAKCAbMh2ysZPQe3oOSjcPsx1_pcnCAQ6yf+gMbv6iDmvfnGXZA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 18:38             ` Mike Frysinger
2015-12-16  7:08               ` Rich Felker
     [not found]                 ` <20151216070839.GE238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-12-16 20:34                   ` Mike Frysinger
     [not found]                     ` <20151216203432.GR11489-UgUKS2FnFs9+urZeOPWqwQ@public.gmane.org>
2015-12-16 21:59                       ` Rich Felker
     [not found]                         ` <20151216215955.GJ238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-12-16 22:27                           ` Zack Weinberg [this message]
2015-12-16 22:44                             ` Rich Felker
     [not found]                               ` <20151216224432.GK238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-12-16 22:51                                 ` Zack Weinberg
2015-12-17  3:15                           ` Mike Frysinger
     [not found] ` <CAMe9rOoJLk8VzyJKmkOvbmBxhCj4mVA2huYtHJsdxpatbkgJ1g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 14:16   ` Andreas Schwab
     [not found]     ` <mvmegen94qs.fsf-8jEJWzg51KSXcDkGTvBoYw@public.gmane.org>
2015-12-15 14:17       ` H.J. Lu
2015-12-16 13:38         ` Michael Kerrisk (man-pages)
     [not found]           ` <5671696B.3070203-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-12-16 13:53             ` H.J. Lu
     [not found]               ` <CAMe9rOqsxCEia7OWqzJ-HzZWCra5BTyYqt4japjZTw0pY=fugw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-16 14:07                 ` Michael Kerrisk (man-pages)
     [not found]                   ` <56717032.7000007-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-12-16 14:50                     ` Zack Weinberg
     [not found]                       ` <CAKCAbMjrKfsT7P=Q=+1zWC68552aK=ciod0HYk3=HWMvkYW26w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-16 15:04                         ` Michael Kerrisk (man-pages)
2015-12-16 23:05                       ` Paul Eggert
     [not found]                         ` <5671EE36.1000402-764C0pRuGfqVc3sceRu5cw@public.gmane.org>
2015-12-17  5:53                           ` Michael Kerrisk (man-pages)

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