Re: lsof crashes in Arm Optimized Routines

On 11/18/22 01:57, Mark Millard wrote:
>> On Nov 15, 2022, at 03:33, Ronald Klop <ronald-lists@klop.ws> wrote:
>>
>> Sorry for the noise.
>>
>> But I cannot reproduce this today. I can scroll back in my terminal and see the command and error from yesterday, but running the same again just works.
> 
> FYI:
> 
> I do not have specifics any more, but I'll note that I've seen
> such lsof behavior of failing at one time and later working
> without any installed updates to it or the system between. I
> rarely use lsof and, so, this was not recently.
> 
> I've no clue how to cause the failure(s) to show up. I've no
> clue how common the issue is. But, over time, it is not just
> you.
> 
>>
>> Van: Ronald Klop <ronald-lists@klop.ws>
>> Datum: maandag, 14 november 2022 21:53
>> Aan: freebsd-arm@FreeBSD.org, Andrew Turner <andrew@FreeBSD.org>
>> Onderwerp: lsof crashes in Arm Optimized Routines
>> Hi,
>>
>> See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267760 : Segmentation fault in lsof. Program received signal SIGSEGV, Segmentation fault.
>> Invalid permissions for mapped object.
>> memcpy () at /home/ronald/dev/freebsd/src/contrib/arm-optimized-routines/string/aarch64/memcpy.S:175
>> 175 stp D_l, D_h, [dst, 64]!
>>
>> I also remembered this change: https://cgit.freebsd.org/src/log/contrib/arm-optimized-routines?showmsg=1 about Arm Optimized Routines.
>>
>> Could this be related? What can I do to help debug this?
>>
> 
> 
>    
> ===
> Mark Millard
> marklmi at yahoo.com
> 


I'm having this issue again.

No debugging symbols found in lsof)
(gdb) run
Starting program: /usr/local/sbin/lsof

Program received signal SIGSEGV, Segmentation fault.
Invalid permissions for mapped object.
memcpy () at /home/ronald/dev/freebsd/src/contrib/arm-optimized-routines/string/aarch64/memcpy.S:171
bt
171             stp     B_l, B_h, [dst, 32]
(gdb) bt
#0  memcpy () at /home/ronald/dev/freebsd/src/contrib/arm-optimized-routines/string/aarch64/memcpy.S:171
#1  0x0000000000218be4 in ?? ()
#2  0x0000000400000000 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)


Some output of "truss -o /tmp/lsof.txt lsof":

__sysctl("kern.proc.filedesc.1",4,0x0,0x80ba06f0,0x0,0) = 0 (0x0)
__sysctl("kern.proc.filedesc.1",4,0x851d6000,0x80ba06f0,0x0,0) = 0 (0x0)
__sysctl("kern.proc.filedesc.385",4,0x0,0x80ba06f0,0x0,0) = 0 (0x0)
__sysctl("kern.proc.filedesc.385",4,0x8516ec00,0x80ba06f0,0x0,0) = 0 (0x0)
__sysctl("kern.proc.filedesc.97537",4,0x0,0x80ba06f0,0x0,0) = 0 (0x0)
__sysctl("kern.proc.filedesc.97537",4,0x8516ec00,0x80ba06f0,0x0,0) = 0 (0x0)
statfs("/data/jails/jail13/_root/home/root/dev/workspace/FreeBSD-Ports-13/_root/usr/local/poudriere/data/.m/freebsd13-custom/04/bin/sh",{ fstypename=nullfs,mntonname=/data/jails/jail13/_root/home,mntfromname=/data/jails/_home,fsid=3cff022929000000 }) = 0 (0x0)
statfs("/data/jails/jail13/_root",{ fstypename=nullfs,mntonname=/data/jails/jail13/_root,mntfromname=/data/jails/freebsd13,fsid=37ff022929000000 }) = 0 (0x0)
statfs("/data/jails/_home3root/dev/workspace/FreeBSD-Ports-13/_root/usr/local/poudriere/data/.m/freebsd13-custom/04/bin/sh",0x80b9ef40) ERR#2 'No such file or directory'
statfs("/data/jails/_home3root/dev/workspace/FreeBSD-Ports-13/_root/usr/local/poudriere/data/.m/freebsd13-custom/04/wrkdirs/usr/ports/devel/cmake-core/work/cmake-3.24.3/Source",0x80b9ef40) ERR#2 'No such file or directory'
statfs("/data/jails/_home3root/dev/workspace/FreeBSD-Ports-13/_root/usr/local/poudriere/data/.m/freebsd13-custom/04",0x80b9ef40) ERR#2 'No such file or directory'
statfs("/data/jails/freebsd13ovt",0x80b9ef40)    ERR#2 'No such file or directory'
SIGNAL 11 (SIGSEGV) code=SEGV_MAPERR trapno=36 addr=0x80ba1000
process killed, signal = 11 (core dumped)


I'm surprised that the path names in the truss output are corrupted: _home3root should be _home/root.

NB: I'm using lsof while running poudriere in a jail in a Jenkins agent.

Regards,
Ronald.