NetBSD Problem Report #55200
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for <gnats-bugs@gnats.NetBSD.org>; Thu, 23 Apr 2020 15:50:21 +0000 (UTC)
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Date: Thu, 23 Apr 2020 15:50:20 +0000 (UTC)
From: tnn@nygren.pp.se
Reply-To: tnn@nygren.pp.se
To: gnats-bugs@NetBSD.org
Subject: COMPAT_NETBSD32 sigaction/sigaltstack support is broken
X-Send-Pr-Version: www-1.0
>Number: 55200
>Category: port-evbarm
>Synopsis: COMPAT_NETBSD32 sigaction/sigaltstack support is broken
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: port-evbarm-maintainer
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Apr 23 15:55:00 +0000 2020
>Closed-Date: Thu Aug 05 18:02:02 +0000 2021
>Last-Modified: Thu Aug 05 18:02:02 +0000 2021
>Originator: Tobias Nygren
>Release: 9.99.57
>Organization:
>Environment:
>Description:
The kernel does not correctly switch to the user defined signal stack when running 32-bit binaries on an aarch64 kernel.
>How-To-Repeat:
/* SS_ONSTACK assertion should not fail, but does. */
#include <signal.h>
#include <unistd.h>
#include <assert.h>
#include <stdio.h>
char mystack[SIGSTKSZ];
void handler(int signum) {
uint8_t a;
stack_t oss;
if (sigaltstack(NULL, &oss) < 0)
perror("sigaltstack");
assert(oss.ss_flags & SS_ONSTACK);
}
int main(void) {
stack_t s = (stack_t){.ss_sp = mystack, .ss_size = sizeof(mystack), .ss_flags = 0 };
struct sigaction act = (struct sigaction){ .sa_handler = handler, .sa_flags = SA_ONSTACK };
sigemptyset(&act.sa_mask);
if (sigaltstack(&s, 0) < 0)
perror("sigaltstack");
if (sigaction(SIGUSR1, &act, NULL) < 0)
perror("sigaction");
kill(getpid(), SIGUSR1);
sleep(1);
return 0;
}
>Fix:
Something wrong in netbsd32_sendsig_siginfo?
>Release-Note:
>Audit-Trail:
From: "Tobias Nygren" <tnn@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc:
Subject: PR/55200 CVS commit: src/sys/arch/aarch64/aarch64
Date: Thu, 23 Apr 2020 16:37:39 +0000
Module Name: src
Committed By: tnn
Date: Thu Apr 23 16:37:39 UTC 2020
Modified Files:
src/sys/arch/aarch64/aarch64: netbsd32_machdep.c
Log Message:
fix inverted logic in NETBSD32 user signal stack handling (PR evbarm/55200)
To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/sys/arch/aarch64/aarch64/netbsd32_machdep.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
State-Changed-From-To: open->needs-pullups
State-Changed-By: tnn@NetBSD.org
State-Changed-When: Thu, 23 Apr 2020 16:44:34 +0000
State-Changed-Why:
Should be pulled up.
State-Changed-From-To: needs-pullups->pending-pullups
State-Changed-By: tnn@NetBSD.org
State-Changed-When: Fri, 01 May 2020 18:24:19 +0000
State-Changed-Why:
pullup-9 #883 and #884.
From: "Martin Husemann" <martin@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc:
Subject: PR/55200 CVS commit: [netbsd-9] src/sys/arch/aarch64/aarch64
Date: Sat, 2 May 2020 16:26:04 +0000
Module Name: src
Committed By: martin
Date: Sat May 2 16:26:04 UTC 2020
Modified Files:
src/sys/arch/aarch64/aarch64 [netbsd-9]: netbsd32_machdep.c
Log Message:
Pull up following revision(s) (requested by tnn in ticket #883):
sys/arch/aarch64/aarch64/netbsd32_machdep.c: revision 1.11
fix inverted logic in NETBSD32 user signal stack handling (PR evbarm/55200)
To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.7.2.1 src/sys/arch/aarch64/aarch64/netbsd32_machdep.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
State-Changed-From-To: pending-pullups->closed
State-Changed-By: tnn@NetBSD.org
State-Changed-When: Thu, 05 Aug 2021 18:02:02 +0000
State-Changed-Why:
was pulled up
>Unformatted:
(Contact us)
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