NetBSD Problem Report #50760

From martin@duskware.de  Wed Feb  3 12:48:12 2016
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From: martin@NetBSD.org
Reply-To: martin@NetBSD.org
To: gnats-bugs@NetBSD.org
Subject: kernel module loader crashes on shark (earmv4)
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>Number:         50760
>Category:       port-arm
>Synopsis:       kernel module loader crashes on shark (earmv4)
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 03 12:50:01 +0000 2016
>Closed-Date:    Fri Nov 05 17:57:15 +0000 2021
>Last-Modified:  Fri Nov 05 17:57:15 +0000 2021
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.26
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-rest.duskware.de 7.99.26 NetBSD 7.99.26 (GENERIC) #146: Mon Feb 1 19:59:07 CET 2016 martin@seven-days-to-the-wolves.aprisoft.de:/ssd/src/sys/arch/shark/compile/GENERIC shark
Architecture: earmv4
Machine: shark
>Description:

Note: last weeks test runs did not show this problem, something has changed
recently [and it is not new binutils]. Also note a non-priviledged user
can cause this, if module loading is enabled.

When loading some module the kernel module loader causes a crash:

data_abort_handler: data_aborts fsr=0x85d5003 far=0xf6521e2f
Fatal kernel mode data abort: 'Alignment Fault 3'
trapframe: 0xf609fa18
FSR=085d5003, FAR=f6521e2f, spsr=60000013
r0 =f189fad8, r1 =f6521e29, r2 =f15544b8, r3 =00000000
r4 =00000002, r5 =00000006, r6 =00000b02, r7 =00000001
r8 =00000004, r9 =f6521e29, r10=0000000e, r11=f609fa84
r12=f609fa88, ssp=f609fa68, slr=f01e7380, pc =f00153a0

Stopped in pid 135.1 (t_spawn) at       netbsd:kobj_reloc+0x18: ldreq   r7, [r1,
 r5]


>How-To-Repeat:

  > cd /usr/tests/lib/libc/gen/posix_spawn
  > atf-run t_spawn
[...]
  tc-start: 1454503024.385359, t_spawn_nonexec
  tc-end: 1454503024.511150, t_spawn_nonexec, passed
  tc-start: 1454503024.530210, t_spawn_zero
[and will crash here]

>Fix:
n/a

>Release-Note:

>Audit-Trail:
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: port-arm/50760: crash in kobj_reloc on shark
Date: Wed, 3 Feb 2016 15:27:29 +0100

 The module it is trying to load is:

 /stand/shark/7.99.26/modules/exec_elf32/exec_elf32.kmod

 Of course this does not make any sense at all.

 Martin

State-Changed-From-To: open->closed
State-Changed-By: martin@NetBSD.org
State-Changed-When: Fri, 05 Nov 2021 17:57:15 +0000
State-Changed-Why:
Works in -current


>Unformatted:

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