From: David Miller <davem@davemloft.net>
To: viro@ZenIV.linux.org.uk
Cc: torvalds@linux-foundation.org, monstr@monstr.eu,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: sigaltstack fun
Date: Sun, 18 Nov 2012 22:27:24 -0500 (EST) [thread overview]
Message-ID: <20121118.222724.1495808364736017374.davem@davemloft.net> (raw)
In-Reply-To: <20121119023507.GK16916@ZenIV.linux.org.uk>
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: Mon, 19 Nov 2012 02:35:07 +0000
> sparc64: not any error from do_sigaltstack() should fail rt_sigreturn()
>
> If a signal handler is executed on altstack and another signal comes,
> we will end up with rt_sigreturn() on return from the second handler
> getting -EPERM from do_sigaltstack(). It's perfectly OK, since we
> are not asking to change the settings; in fact, they couldn't have been
> changed during the second handler execution exactly because we'd been
> on altstack all along. 64bit sigreturn on sparc treats any error from
> do_sigaltstack() as "SIGSEGV now"; we need to switch to the same semantics
> we are using on other architectures.
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Applied, thanks.
next prev parent reply other threads:[~2012-11-19 3:27 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-16 22:35 new execve/kernel_thread design Al Viro
2012-10-17 5:32 ` Max Filippov
2012-10-17 5:43 ` Al Viro
2012-10-17 14:07 ` Jonas Bonn
2012-10-17 14:27 ` Michal Simek
2012-10-17 14:27 ` Michal Simek
2012-10-17 16:07 ` Al Viro
2012-10-17 16:07 ` Al Viro
2012-10-17 16:19 ` Al Viro
2012-10-17 16:19 ` Al Viro
2012-11-15 16:41 ` Michal Simek
2012-11-15 16:41 ` Michal Simek
2012-11-15 21:55 ` Al Viro
2012-11-15 21:55 ` Al Viro
2012-11-16 7:59 ` Michal Simek
2012-11-18 5:45 ` sigaltstack fun (was Re: new execve/kernel_thread design) Al Viro
2012-11-18 18:45 ` Linus Torvalds
2012-11-18 19:03 ` sigaltstack fun David Miller
2012-11-18 19:59 ` Al Viro
2012-11-18 20:48 ` David Miller
2012-11-19 4:55 ` Greg KH
2012-11-18 21:02 ` Al Viro
2012-11-18 21:18 ` David Miller
2012-11-19 1:10 ` Al Viro
2012-11-19 1:30 ` David Miller
2012-11-19 2:35 ` Al Viro
2012-11-19 3:27 ` David Miller [this message]
2012-11-26 5:10 ` Al Viro
2012-11-26 5:15 ` Al Viro
2012-12-04 3:03 ` David Miller
2012-12-04 2:58 ` David Miller
2012-11-21 1:53 ` sigaltstack fun (was Re: new execve/kernel_thread design) Al Viro
2012-10-19 15:49 ` new execve/kernel_thread design Al Viro
2012-10-19 17:16 ` Luck, Tony
2012-10-19 17:30 ` Al Viro
2012-10-19 18:01 ` Tony Luck
2012-10-19 18:33 ` Al Viro
2012-10-19 20:25 ` [PATCH] tile: support GENERIC_KERNEL_THREAD and GENERIC_KERNEL_EXECVE Chris Metcalf
2012-10-19 20:25 ` Chris Metcalf
2012-10-19 21:35 ` Al Viro
2012-10-20 13:06 ` Chris Metcalf
2012-10-20 13:06 ` Chris Metcalf
2012-10-20 15:34 ` Al Viro
2012-10-20 17:16 ` Al Viro
2012-10-23 17:30 ` Chris Metcalf
2012-10-23 17:30 ` Chris Metcalf
2012-10-23 18:41 ` Al Viro
2012-10-23 19:22 ` Chris Metcalf
2012-10-23 19:22 ` Chris Metcalf
2012-10-23 20:36 ` Al Viro
2012-10-25 13:31 ` Chris Metcalf
2012-10-25 13:31 ` Chris Metcalf
2012-10-25 14:25 ` Al Viro
2012-10-23 20:47 ` Thomas Gleixner
2012-10-23 20:51 ` Jeff King
2012-10-23 21:09 ` Catalin Marinas
2012-10-23 21:22 ` Jeff King
2012-10-24 11:18 ` Catalin Marinas
2012-10-23 21:25 ` Thomas Gleixner
2012-10-23 21:47 ` Jeff King
2012-10-23 22:06 ` Marc Gauthier
2012-10-23 22:23 ` Jeff King
2012-10-24 6:02 ` Johannes Sixt
2012-10-24 1:02 ` Linus Torvalds
2012-10-24 1:56 ` Al Viro
2012-10-24 2:14 ` Linus Torvalds
2012-10-24 6:02 ` Ingo Molnar
2012-10-23 17:30 ` [PATCH] arch/tile: eliminate pt_regs trampolines for syscalls Chris Metcalf
2012-10-23 17:30 ` Chris Metcalf
2012-10-22 14:23 ` [PATCH] tile: support GENERIC_KERNEL_THREAD and GENERIC_KERNEL_EXECVE Catalin Marinas
2012-10-19 20:25 ` Chris Metcalf
2012-10-25 16:54 ` new execve/kernel_thread design Richard Kuo
2012-10-26 18:31 ` [update] " Al Viro
2012-10-26 18:31 ` Al Viro
2012-10-27 3:32 ` Al Viro
2012-10-27 3:32 ` Al Viro
2012-10-29 7:53 ` Martin Schwidefsky
2012-10-29 7:53 ` Martin Schwidefsky
2012-10-29 13:25 ` Al Viro
2012-10-29 13:25 ` Al Viro
2012-10-29 14:38 ` Martin Schwidefsky
2012-10-29 14:38 ` Martin Schwidefsky
2012-10-29 14:57 ` Al Viro
2012-10-29 14:57 ` Al Viro
2012-12-07 22:23 ` Al Viro
2012-12-07 22:23 ` Al Viro
2012-12-08 2:40 ` Chris Metcalf
2012-12-08 2:40 ` Chris Metcalf
2012-12-08 2:40 ` Chris Metcalf
2012-12-13 1:54 ` Hirokazu Takata
2012-12-13 1:54 ` Hirokazu Takata
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