From nobody Mon Mar 07 10:38:59 2022 X-Original-To: freebsd-arm@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id EB43819FDE01; Mon, 7 Mar 2022 10:39:03 +0000 (UTC) (envelope-from SRS0=34E+=TS=klop.ws=ronald-lists@realworks.nl) Received: from smtp-relay-int.realworks.nl (smtp-relay-int.realworks.nl [194.109.157.24]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4KBw1L53S7z3sbn; Mon, 7 Mar 2022 10:39:02 +0000 (UTC) (envelope-from SRS0=34E+=TS=klop.ws=ronald-lists@realworks.nl) Date: Mon, 7 Mar 2022 11:38:59 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=klop.ws; s=rw2; t=1646649539; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+qQZYHdB3YNrYW6YzD6SgwhJkJg6yyGjGAPj2WC58aE=; b=bpEOvOrCbEoRyPHrp/lk8ojpayCo+NS/oLWUlUbadR+pgAnyYovx5lSh0KSctQsZhNs71D t6Nsmg0LmZamQcZEGj9GfYwgHbOQ6Fd6Bf3KEbUABX+OCz7YpUdD0e6+luDljMEw0eZ74F 9TXQ8klZWK2AKiYDyJMefhXl9HcCWc9lB3/P9rDPt+Wf6HlwiSbAL4FOhKKjb7fETRuVJe m1IgAa6fF59ci8zDtxyzfWOzcE8hC2ff0R8uZhi+Xi4J6dogTubYwFDq2xWNkMq21odRK5 wbcD277oDjJaew3c92VIdWi+0Wd/tNJB9KZsPXxXbUTVkKLlGZ0Df3n8J6j2Pw== From: Ronald Klop To: Mark Millard Cc: bob prohaska , freebsd-current , freebsd-arm@freebsd.org Message-ID: <1800459695.1.1646649539521@mailrelay> In-Reply-To: References: Subject: Re: panic: data abort in critical section or under mutex (was: Re: panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64 Feb 28)) List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_0_597764175.1646649539431" X-Mailer: Realworks (599.211.aa1e011) Importance: Normal X-Priority: 3 (Normal) X-Rspamd-Queue-Id: 4KBw1L53S7z3sbn X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=klop.ws header.s=rw2 header.b=bpEOvOrC; dmarc=pass (policy=quarantine) header.from=klop.ws; spf=pass (mx1.freebsd.org: domain of "SRS0=34E@realworks.nl" designates 194.109.157.24 as permitted sender) smtp.mailfrom="SRS0=34E@realworks.nl" X-Spamd-Result: default: False [-3.15 / 15.00]; ARC_NA(0.00)[]; FORGED_SENDER(0.30)[ronald-lists@klop.ws,SRS0=34E@realworks.nl]; R_DKIM_ALLOW(-0.20)[klop.ws:s=rw2]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:194.109.157.0/24]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; NEURAL_HAM_LONG(-1.00)[-1.000]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[klop.ws:+]; DMARC_POLICY_ALLOW(-0.50)[klop.ws,quarantine]; HAS_X_PRIO_THREE(0.00)[3]; NEURAL_HAM_SHORT(-0.95)[-0.953]; MLMMJ_DEST(0.00)[freebsd-arm,freebsd-current]; FREEMAIL_TO(0.00)[yahoo.com]; RCVD_COUNT_ZERO(0.00)[0]; MIME_TRACE(0.00)[0:+,1:+,2:~]; MID_RHS_NOT_FQDN(0.50)[]; ASN(0.00)[asn:3265, ipnet:194.109.0.0/16, country:NL]; TAGGED_FROM(0.00)[=TS=klop.ws=ronald-lists]; FROM_NEQ_ENVFROM(0.00)[ronald-lists@klop.ws,SRS0=34E@realworks.nl] X-ThisMailContainsUnwantedMimeParts: N ------=_Part_0_597764175.1646649539431 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Yes, I spoke to soon too. Often it crashes as soon as I start a parallel po= udriere build. But this time it went very far. As soon as nightly backups k= icked in it was game over again. I had read the mail of Bob on the arm@ ML. But I wanted to let the conclusi= on that it is about the same problem to the developers. (Have seen enough o= f wrong guessing of causes in my work. =F0=9F=98=89) I will need to go further into the binary search of working kernels. This was: FreeBSD 14.0-CURRENT #0 912df91: Wed Mar 2 00:36:35 UTC 2022 Fatal data abort: = =20 x0: ffff000000f1efd8 x0: ffff000000f1efd8 (mac_policy_rm + 0) (mac_polic= y_rm + 0) =20 = =20 x1: 2 x1: 2 = =20 = =20 x2: ffff00000087dcf2 x2: ffff00000087dcf2 (cam_status_table + 2f28a) = =20 (cam_status_table + 2f28a) x3: ffff00000087dcf2 = =20 x3: ffff00000087dcf2 (cam_status_table + 2f28a) (cam_status_table + 2f28a= ) =20 = =20 x4: 102 x4: 102 = =20 = =20 x5: 7 x5: 1 = =20 = =20 x6: 0 x6: ff = =20 = =20 x7: 0 x7: ffffa00011fc2800 = =20 x8: 1 = =20 = =20 x8: 1 x9: ffff000000f37c10 = =20 x9: ffff0000419d9090 (pcpu0 + 90) (g_ctx + 40278fe4) = =20 = =20 x10: ffffa0017be2a600 x10: ffffa000010fa600 = =20 x11: 394aed08d0003a48 = =20 = =20 x12: 350001a8b946a108 x11: 0 = =20 = =20 x12: ffff000000f37c10 x13: badecce4 (pcpu0 + 90) = =20 = =20 x13: ffffa0001fbde6b0 x14: 0 = =20 = =20 x14: 4965ae49 x15: 1 = =20 = =20 x15: 1000193 x16: ffff0000016a4238 = =20 x16: ffff000100482d38 (__stop_set_modmetadata_set + d00) (__stop_set_modme= tadata_set + 448) =20 = =20 x17: ffff00000044a998 x17: ffff00000058ff30 (free + 0) (if_inc_counter + 0= ) =20 = =20 x18: ffff0000b49a23c0 x18: ffff000103f11b80 (g_ctx + b3242314) = =20 (next_index + 3a228c0) x19: 102 = =20 = =20 x19: 102 x20: ffff0000b49a2428 = =20 x20: ffff000103f11be8 (g_ctx + b324237c) (next_index + 3a22928) = =20 x21: ffff00000087dcf2 x21: ffff00000087dcf2 (cam_status_table + 2f28a) (ca= m_status_table + 2f28a) x22: ffff000000f1efd8 x22: ffff000000f1efd8 (mac_policy_rm + 0) (mac_polic= y_rm + 0) x23: ffff00000086f107 x23: 0 (cam_status_table + 2069f) x24: ffffa0001fbde6c8 x24: ffffa0008cba0d00 x25: 0 x25: ffff00000088aa11 x26: 4 (do_execve.fexecv_proc_title += 76b7) x27: 0 x26: ffffa0017be2a600 x28: ffff00010209fcf0 x27: ffffa00025626a80 (next_index + 1bb0a30) x28: ffff000103f11ce0 x29: ffff0000b49a23e0 (next_index + 3a22a20) (g_ctx = + b3242334) x29: ffff000103f11ba0 sp: ffff0000b49a23c0 (next_index + 3a228e0) lr: ffff00000046ef98 sp: ffff000103f11b80 (_rm_runlock_debug + 60) lr: ffff00000046ef98 elr: ffff00000046dc0c (_rm_runlock_debug + 60) (_rm_assert + a4) elr: ffff00000046dc0cspsr: 45 (_rm_assert + a4) far: 10 esr: 96000004 spsr: 45 panic: data abort in critical section or under mutex cpuid =3D 1 time =3D 1646609483 KDB: stack backtrace: db_trace_self() at db_trace_self db_trace_self_wrapper() at db_trace_self_wrapper+0x30 vpanic() at vpanic+0x174 panic() at panic+0x44 data_abort() at data_abort+0x2d4 handle_el1h_sync() at handle_el1h_sync+0x10 --- exception, esr 0x96000004 _rm_assert() at _rm_assert+0xa4 _rm_runlock_debug() at _rm_runlock_debug+0x5c mac_inpcb_check_deliver() at mac_inpcb_check_deliver+0x74 tcp_input_with_port() at tcp_input_with_port+0xab4 tcp_input() at tcp_input+0xc ip_input() at ip_input+0x2e8 netisr_dispatch_src() at netisr_dispatch_src+0xe4 ether_demux() at ether_demux+0x178 ether_nh_input() at ether_nh_input+0x3e8 netisr_dispatch_src() at netisr_dispatch_src+0xe4 ether_input() at ether_input+0x80 if_input() at if_input+0xc gen_intr() at gen_intr+0x444 ithread_loop() at ithread_loop+0x2a0 fork_exit() at fork_exit+0x74 fork_trampoline() at fork_trampoline+0x14 KDB: enter: panic [ thread pid 12 tid 100063 ] Stopped at kdb_enter+0x44: undefined f902011f db> NB: db> reboot/reset/halt does not work on my RPI4. Luckily I have a wifi c= onnected power switch on it. Regards, Ronald. =20 Van: Mark Millard Datum: maandag, 7 maart 2022 02:01 Aan: Ronald Klop CC: freebsd-current , bob prohaska Onderwerp: Re: panic: data abort in critical section or under mutex (was: R= e: panic: Unknown kernel exception 0 esr_el1 2000000 (on 14-CURRENT/aarch64= Feb 28)) >=20 > From: Ronald Klop wrote on > Date: Sun, 6 Mar 2022 23:22:42 +0100 (CET) : >=20 > > Did some binary search with kernels from artifact.ci.freebsd.org. > > > > I suspect "rmlock: Micro-optimize read locking" as cause. > > > > https://cgit.freebsd.org/src/commit/?id=3Dc84bb8cd771ce4bed58152e47a32d= da470bef23a > > > > > > And "rmlock: Add required compiler barriers to _rm_runlock()" as soluti= on. > > > > https://cgit.freebsd.org/src/commit/?id=3D89ae8eb74e87ac19aa2d7abe4ba16= bcccd32bb9f > > > > > > So I probably just had a bad day. >=20 > Well, there is a report of a buildkernel crash after that pair: >=20 > https://lists.freebsd.org/archives/freebsd-arm/2022-March/001078.html >=20 > that references additional information at: >=20 > http://www.zefox.net/~fbsd/rpi3/crashes/20220304/readme >=20 > and reported: >=20 > QUOTE > The console connection dropped before the crash (unrelated) I didn't > get the preamble, all I have is the backtrace and buildkernel log. > Here's the backtrace: > db> bt > Tracing pid 14795 tid 100098 td 0xffffa00017815600 > db_trace_self() at db_trace_self > db_stack_trace() at db_stack_trace+0x11c > db_command() at db_command+0x368 > db_command_loop() at db_command_loop+0x54 > db_trap() at db_trap+0xf8 > kdb_trap() at kdb_trap+0x1cc > handle_el1h_sync() at handle_el1h_sync+0x10 > --- exception, esr 0xf2000000 > kdb_enter() at kdb_enter+0x44 > vpanic() at vpanic+0x1b0 > panic() at panic+0x44 > data_abort() at data_abort+0x2e8 > handle_el1h_sync() at handle_el1h_sync+0x10 > --- exception, esr 0x96000004 > _rm_rlock_debug() at _rm_rlock_debug+0x8c > sysctl_root_handler_locked() at sysctl_root_handler_locked+0x140 > sysctl_root() at sysctl_root+0x1ac > userland_sysctl() at userland_sysctl+0x140 > sys___sysctl() at sys___sysctl+0x68 > do_el0_sync() at do_el0_sync+0x520 > handle_el0_sync() at handle_el0_sync+0x40 > --- exception, esr 0x56000000 > END QUOTE >=20 > The above material does reference _rm_rlock_debug . Might be > related? >=20 > The readme reports: >=20 > main-n253603-0b25cbc79d3: Thu Mar 3 22:48:31 PST 2022 >=20 > for the system doing the buildkernel. This is after > 89ae8eb74e8 . >=20 > (It also mentions another panic earlier in the week, > apparently not reported to the lists at the time.) >=20 > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > =20 >=20 >=20 >=20 ------=_Part_0_597764175.1646649539431 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Yes, I spoke to soon too. Often it crashes as soon= as I start a parallel poudriere build. But this time it went very far. As = soon as nightly backups kicked in it was game over again.
I had read the mail of Bob on the arm@ ML. But I wanted to let the conclusi= on that it is about the same problem to the developers. (Have seen enough o= f wrong guessing of causes in my work. =F0=9F=98=89)

I will need to go further into the binary search of working kernels.

This was: FreeBSD 14.0-CURRENT #0 912df91: Wed Mar  2 00:36:35 UTC 202= 2 
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 x22: ffff000000f1efd8 x22: ffff000000f1efd8 (mac_policy_rm + 0) (mac_=
policy_rm + 0)

 x23: ffff00000086f107 x23:       &=
nbsp;        0 (cam_status_table + 2069f=
)

 x24: ffffa0001fbde6c8 x24: ffffa0008cba0d00
 x25:           =
;     0

 x25: ffff00000088aa11 x26:       &=
nbsp;        4 (do_execve.fexecv_proc_ti=
tle + 76b7)

 x27:           =
;     0 x26: ffffa0017be2a600
 x28: ffff00010209fcf0
 x27: ffffa00025626a80 (next_index + 1bb0a30)

 x28: ffff000103f11ce0 x29: ffff0000b49a23e0 (next_index + 3a22a20) (g=
_ctx + b3242334)

 x29: ffff000103f11ba0  sp: ffff0000b49a23c0
 (next_index + 3a228e0)  lr: ffff00000046ef98
  sp: ffff000103f11b80
 (_rm_runlock_debug + 60)  lr: ffff00000046ef98
 elr: ffff00000046dc0c (_rm_runlock_debug + 60) (_rm_assert + a4)

 elr: ffff00000046dc0cspsr:       &=
nbsp;       45
 (_rm_assert + a4) far:        =
;       10

 esr:         96000004
spsr:           &nbs=
p;   45

panic: data abort in critical section or under mutex
cpuid =3D 1
time =3D 1646609483
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
vpanic() at vpanic+0x174
panic() at panic+0x44
data_abort() at data_abort+0x2d4
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0x96000004
_rm_assert() at _rm_assert+0xa4
_rm_runlock_debug() at _rm_runlock_debug+0x5c
mac_inpcb_check_deliver() at mac_inpcb_check_deliver+0x74
tcp_input_with_port() at tcp_input_with_port+0xab4
tcp_input() at tcp_input+0xc
ip_input() at ip_input+0x2e8
netisr_dispatch_src() at netisr_dispatch_src+0xe4
ether_demux() at ether_demux+0x178
ether_nh_input() at ether_nh_input+0x3e8
netisr_dispatch_src() at netisr_dispatch_src+0xe4
ether_input() at ether_input+0x80
if_input() at if_input+0xc
gen_intr() at gen_intr+0x444
ithread_loop() at ithread_loop+0x2a0
fork_exit() at fork_exit+0x74
fork_trampoline() at fork_trampoline+0x14
KDB: enter: panic
[ thread pid 12 tid 100063 ]
Stopped at      kdb_enter+0x44: undefined &nb=
sp;     f902011f
db>

NB: db> reboot/reset/halt does not work on my RPI4. Luckily I have a wif= i connected power switch on it.

Regards,
Ronald.

 

Van: Mark Millard <marklmi@yahoo.com>
Datum: maandag, 7 maart 2022 02:01
Aan: Ronald Klop <ronald-lists@klop.ws>
CC: freebsd-current <freebsd-current@freebsd.org>, b= ob prohaska <fbsd@www.zefox.net>
Onderwerp: Re: panic: data abort in critical section or un= der mutex (was: Re: panic: Unknown kernel exception 0 esr_el1 2000000 (on 1= 4-CURRENT/aarch64 Feb 28))

From: Ronald Klop <ronald-list= s_at_klop.ws> wrote on
Date: Sun, 6 Mar 2022 23:22:42 +0100 (CET) :

> Did some binary search with kernels from artifact.ci.freebsd.org.
>
> I suspect "rmlock: Micro-optimize read locking" as cause. >
> https://cgit.freebsd.org/src/commit/?id=3Dc84bb8cd= 771ce4bed58152e47a32dda470bef23a
>
>
> And "rmlock: Add required compiler barriers to _rm_runlock()"= ; as solution.
>
> https://cgit.freebsd.org/src/commit/?id=3D89ae8eb7= 4e87ac19aa2d7abe4ba16bcccd32bb9f
>
>
> So I probably just had a bad day.

Well, there is a report of a buildkernel crash after that pair:

https://lists.freebsd.org/archives/freebsd-arm/2022-March/001078.htm= l

that references additional information at:

http://= www.zefox.net/~fbsd/rpi3/crashes/20220304/readme

and reported:

QUOTE
The console connection dropped before the crash (unrelated) I didn't
get the preamble, all  I have is the backtrace and buildkernel log. Here's the backtrace:
db> bt
Tracing pid 14795 tid 100098 td 0xffffa00017815600
db_trace_self() at db_trace_self
db_stack_trace() at db_stack_trace+0x11c
db_command() at db_command+0x368
db_command_loop() at db_command_loop+0x54
db_trap() at db_trap+0xf8
kdb_trap() at kdb_trap+0x1cc
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0xf2000000
kdb_enter() at kdb_enter+0x44
vpanic() at vpanic+0x1b0
panic() at panic+0x44
data_abort() at data_abort+0x2e8
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0x96000004
_rm_rlock_debug() at _rm_rlock_debug+0x8c
sysctl_root_handler_locked() at sysctl_root_handler_locked+0x140
sysctl_root() at sysctl_root+0x1ac
userland_sysctl() at userland_sysctl+0x140
sys___sysctl() at sys___sysctl+0x68
do_el0_sync() at do_el0_sync+0x520
handle_el0_sync() at handle_el0_sync+0x40
--- exception, esr 0x56000000
END QUOTE

The above material does reference _rm_rlock_debug . Might be
related?

The readme reports:

main-n253603-0b25cbc79d3: Thu Mar  3 22:48:31 PST 2022

for the system doing the buildkernel. This is after
89ae8eb74e8 .

(It also mentions another panic earlier in the week,
apparently not reported to the lists at the time.)

=3D=3D=3D
Mark Millard
marklmi at yahoo.com
 
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