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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
@ 2012-02-19 22:07 ` mtk.manpages at gmail dot com
2012-12-19 10:43 ` schwab@linux-m68k.org
` (4 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: mtk.manpages at gmail dot com @ 2012-02-19 22:07 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=9813
Michael Kerrisk <mtk.manpages at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mtk.manpages at gmail dot
| |com
--- Comment #4 from Michael Kerrisk <mtk.manpages at gmail dot com> 2012-02-19 22:06:49 UTC ---
Shachar, I suspect that it's not worth trying to make the fix you suggest. The
fix will only appear in modern glibc, and any modern system will have a
kernel-supported. The fundamental problem can't be remedied: the idea to add a
userspace implementation of pselect() was extremely muddleheaded, and worsens
portability problems for applications. The portability question goes from being
"do I have pselect() or not?" to "do I have a pselect() or not, and if I do, is
it one that works?"; the last part of the second question can only be verified
with a check of the kernel (and glibc) versions.
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
2012-02-19 22:07 ` [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race mtk.manpages at gmail dot com
@ 2012-12-19 10:43 ` schwab@linux-m68k.org
2013-10-13 8:28 ` neleai at seznam dot cz
` (3 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: schwab@linux-m68k.org @ 2012-12-19 10:43 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=9813
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|drepper.fsp at gmail dot |unassigned at sourceware
|com |dot org
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
2012-02-19 22:07 ` [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race mtk.manpages at gmail dot com
2012-12-19 10:43 ` schwab@linux-m68k.org
@ 2013-10-13 8:28 ` neleai at seznam dot cz
2013-10-14 14:24 ` jsm28 at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: neleai at seznam dot cz @ 2013-10-13 8:28 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=9813
Ondrej Bilka <neleai at seznam dot cz> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |neleai at seznam dot cz
Resolution|--- |FIXED
--- Comment #5 from Ondrej Bilka <neleai at seznam dot cz> ---
As according to http://lwn.net/Articles/176911/ pselect apperared at 2.6.16 and
required kernel version is 2.6.16 this patch is moot now.
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
` (2 preceding siblings ...)
2013-10-13 8:28 ` neleai at seznam dot cz
@ 2013-10-14 14:24 ` jsm28 at gcc dot gnu.org
2013-10-14 14:39 ` Ondřej Bílka
2013-10-14 14:39 ` neleai at seznam dot cz
2014-07-01 20:59 ` fweimer at redhat dot com
5 siblings, 1 reply; 10+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-10-14 14:24 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=9813
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #6 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
On various architectures, pselect was only added in later kernel versions.
Please carefully check *all* kernel-features.h files in glibc, or kernel
sources of appropriate versions for *all* architectures, before making
assertions about syscall availability. News sources likely to focus mainly on
x86 are not sufficient.
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* Re: [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
2013-10-14 14:24 ` jsm28 at gcc dot gnu.org
@ 2013-10-14 14:39 ` Ondřej Bílka
0 siblings, 0 replies; 10+ messages in thread
From: Ondřej Bílka @ 2013-10-14 14:39 UTC (permalink / raw)
To: jsm28 at gcc dot gnu.org; +Cc: glibc-bugs
On Mon, Oct 14, 2013 at 02:24:37PM +0000, jsm28 at gcc dot gnu.org wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=9813
>
> Joseph Myers <jsm28 at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|RESOLVED |REOPENED
> Resolution|FIXED |---
>
> --- Comment #6 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
> On various architectures, pselect was only added in later kernel versions.
> Please carefully check *all* kernel-features.h files in glibc, or kernel
> sources of appropriate versions for *all* architectures, before making
> assertions about syscall availability. News sources likely to focus mainly on
> x86 are not sufficient.
Then patch in bugzilla is still valid. Could you review it and send to
libc-alpha?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
` (3 preceding siblings ...)
2013-10-14 14:24 ` jsm28 at gcc dot gnu.org
@ 2013-10-14 14:39 ` neleai at seznam dot cz
2014-07-01 20:59 ` fweimer at redhat dot com
5 siblings, 0 replies; 10+ messages in thread
From: neleai at seznam dot cz @ 2013-10-14 14:39 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=9813
--- Comment #7 from Ondrej Bilka <neleai at seznam dot cz> ---
On Mon, Oct 14, 2013 at 02:24:37PM +0000, jsm28 at gcc dot gnu.org wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=9813
>
> Joseph Myers <jsm28 at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|RESOLVED |REOPENED
> Resolution|FIXED |---
>
> --- Comment #6 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
> On various architectures, pselect was only added in later kernel versions.
> Please carefully check *all* kernel-features.h files in glibc, or kernel
> sources of appropriate versions for *all* architectures, before making
> assertions about syscall availability. News sources likely to focus mainly on
> x86 are not sufficient.
Then patch in bugzilla is still valid. Could you review it and send to
libc-alpha?
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
` (4 preceding siblings ...)
2013-10-14 14:39 ` neleai at seznam dot cz
@ 2014-07-01 20:59 ` fweimer at redhat dot com
5 siblings, 0 replies; 10+ messages in thread
From: fweimer at redhat dot com @ 2014-07-01 20:59 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=9813
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
2009-02-04 10:05 [Bug libc/9813] New: " shachar at shemesh dot biz
2009-02-04 10:36 ` [Bug libc/9813] " shachar at shemesh dot biz
2009-02-04 10:42 ` shachar at shemesh dot biz
@ 2009-02-04 10:52 ` shachar at shemesh dot biz
2 siblings, 0 replies; 10+ messages in thread
From: shachar at shemesh dot biz @ 2009-02-04 10:52 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From shachar at shemesh dot biz 2009-02-04 10:52 -------
Created an attachment (id=3712)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=3712&action=view)
Program demonstrating the problem
This program demonstrate the problem. Under a kernel with pselect support, it
prints:
sig_happened=1
sig_happened=1
sig_happened=1
sig_happened=1
sig_happened=1
And exits almost immediately.
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
2009-02-04 10:05 [Bug libc/9813] New: " shachar at shemesh dot biz
2009-02-04 10:36 ` [Bug libc/9813] " shachar at shemesh dot biz
@ 2009-02-04 10:42 ` shachar at shemesh dot biz
2009-02-04 10:52 ` shachar at shemesh dot biz
2 siblings, 0 replies; 10+ messages in thread
From: shachar at shemesh dot biz @ 2009-02-04 10:42 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From shachar at shemesh dot biz 2009-02-04 10:42 -------
Forgot to add - in the above patch, NSIG_LONGS is undefined. Here is its definition:
// Number of __vals in sigset_t that actually contain useful data
#define NSIG_LONGS (_NSIG/(8*sizeof(((sigset_t *)NULL)->__val[0])))
Shachar
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* [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race
2009-02-04 10:05 [Bug libc/9813] New: " shachar at shemesh dot biz
@ 2009-02-04 10:36 ` shachar at shemesh dot biz
2009-02-04 10:42 ` shachar at shemesh dot biz
2009-02-04 10:52 ` shachar at shemesh dot biz
2 siblings, 0 replies; 10+ messages in thread
From: shachar at shemesh dot biz @ 2009-02-04 10:36 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From shachar at shemesh dot biz 2009-02-04 10:36 -------
Created an attachment (id=3710)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=3710&action=view)
Proposed patch to narrow the race window
Proposed patch to the problem
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end of thread, other threads:[~2014-07-01 20:59 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-9813-131@http.sourceware.org/bugzilla/>
2012-02-19 22:07 ` [Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race mtk.manpages at gmail dot com
2012-12-19 10:43 ` schwab@linux-m68k.org
2013-10-13 8:28 ` neleai at seznam dot cz
2013-10-14 14:24 ` jsm28 at gcc dot gnu.org
2013-10-14 14:39 ` Ondřej Bílka
2013-10-14 14:39 ` neleai at seznam dot cz
2014-07-01 20:59 ` fweimer at redhat dot com
2009-02-04 10:05 [Bug libc/9813] New: " shachar at shemesh dot biz
2009-02-04 10:36 ` [Bug libc/9813] " shachar at shemesh dot biz
2009-02-04 10:42 ` shachar at shemesh dot biz
2009-02-04 10:52 ` shachar at shemesh dot biz
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