Date: Tue, 7 Jun 2022 20:06:03 -0700 From: David Wolfskill <david@catwhisker.org> To: Oleg Lelchuk <oleglelchuk@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: A kernel crash after compiling a fresh kernel Message-ID: <YqASGx83Iv9QT27u@albert.catwhisker.org> In-Reply-To: <CA%2BGqWgsTOu5qY-5yKdp_zJ2ThYxf1ucr%2BAqxOg_21AMhD%2BDbLg@mail.gmail.com> References: <CA%2BGqWgsTOu5qY-5yKdp_zJ2ThYxf1ucr%2BAqxOg_21AMhD%2BDbLg@mail.gmail.com>
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On Tue, Jun 07, 2022 at 09:37:52PM -0400, Oleg Lelchuk wrote:
> The 14-CURRENT running a fresh kernel crashes with these messages:
>=20
> __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
> 55 __asm("movq %%gs:%P1,%0" : "=3Dr" (td) : "n" (offsetof(st=
ruct
> pcpu,
> (kgdb) #0 __curthread () at
> /usr/src/sys/amd64/include/pcpu_aux.h:55
> #1 dump_savectx () at /usr/src/sys/kern/kern_shutdown.c:401
> #2 0xffffffff80be8ba5 in dumpsys (di=3D0x0)
> at /usr/src/sys/x86/include/dump.h:87
> #3 doadump (textdump=3D1) at /usr/src/sys/kern/kern_shutdown.c:430
> #4 kern_reboot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c:537
> #5 0xffffffff80be8fee in vpanic (fmt=3D<optimized out>,
> ap=3Dap@entry=3D0xfffffe01042395a0) at
> /usr/src/sys/kern/kern_shutdown.c:975
> #6 0xffffffff80be8d53 in panic (fmt=3D<unavailable>)
> at /usr/src/sys/kern/kern_shutdown.c:899
> #7 0xffffffff810c0877 in trap_fatal (frame=3D0xfffffe0104239690, eva=3D0)
> at /usr/src/sys/amd64/amd64/trap.c:942
> #8 0xffffffff810c092b in trap_pfault (frame=3D0xfffffe0104239690,
> usermode=3Dfalse, signo=3D<optimized out>, ucode=3D<optimized out=
>)
> at /usr/src/sys/amd64/amd64/trap.c:761
> #9 <signal handler called>
> #10 tcp_sack_output (tp=3Dtp@entry=3D0xfffffe0187312140,
> sack_bytes_rexmt=3Dsack_bytes_rexmt@entry=3D0xfffffe010423983c)
> at /usr/src/sys/netinet/tcp_sack.c:970
> #11 0xffffffff80dd47a2 in tcp_default_output (tp=3D0xfffffe0187312140)
> at /usr/src/sys/netinet/tcp_output.c:310
> #12 0xffffffff80dcd240 in tcp_output (tp=3Dtp@entry=3D0xfffffe0187312140)
> at /usr/src/sys/netinet/tcp_var.h:407
> #13 0xffffffff80dcc81a in tcp_do_segment (m=3D0xfffff80203467700,
> th=3D0xfffff8001f190022, so=3D0xfffff80015d0fb40,
> tp=3D0xfffffe0187312140,
> drop_hdrlen=3D64, tlen=3D<optimized out>, iptos=3D0 '\000=
')
> at /usr/src/sys/netinet/tcp_input.c:2788
> #14 0xffffffff80dc8def in tcp_input_with_port (mp=3D<optimized out>,
> offp=3D<optimized out>, proto=3D<optimized out>, port=3Dp=
ort@entry
> =3D0)
> at /usr/src/sys/netinet/tcp_input.c:1397
> #15 0xffffffff80dc9c8b in tcp_input (mp=3D0xfffff8011c764010, offp=3D0x4,
> proto=3D-2128851986) at /usr/src/sys/netinet/tcp_input.c:=
1492
> #16 0xffffffff80db8cd7 in ip_input (m=3D0x0)
> at /usr/src/sys/netinet/ip_input.c:840
> #17 0xffffffff80d3842f in netisr_dispatch_src (proto=3D1,
> source=3Dsource@entry=3D0, m=3D0xfffff80203467700)
> at /usr/src/sys/net/netisr.c:1153
> #18 0xffffffff80d3878f in netisr_dispatch (proto=3D477511696,
> m=3D0xffffffff811c4bee) at /usr/src/sys/net/netisr.c:1244
> #19 0xffffffff80d1a7cc in ether_demux (ifp=3Difp@entry=3D0xfffff800028738=
00,
> m=3D0x4) at /usr/src/sys/net/if_ethersubr.c:925
> #20 0xffffffff80d1be53 in ether_input_internal (ifp=3D0xfffff80002873800,
> m=3D0x4)
> at /usr/src/sys/net/if_ethersubr.c:711
> #21 ether_nh_input (m=3D<optimized out>) at
> /usr/src/sys/net/if_ethersubr.c:741
> #22 0xffffffff80d3842f in netisr_dispatch_src (proto=3Dproto@entry=3D5,
> source=3Dsource@entry=3D0, m=3Dm@entry=3D0xfffff802034677=
00)
> at /usr/src/sys/net/netisr.c:1153
> #23 0xffffffff80d3878f in netisr_dispatch (proto=3D477511696, proto@entry=
=3D5,
> m=3D0xffffffff811c4bee, m@entry=3D0xfffff80203467700)
> at /usr/src/sys/net/netisr.c:1244
> #24 0xffffffff80d1ac89 in ether_input (ifp=3D0xfffff80002873800,
> m=3D0xfffff80203467700) at /usr/src/sys/net/if_ethersubr.=
c:832
> #25 0xffffffff808f41f7 in re_rxeof (sc=3Dsc@entry=3D0xfffffe00e1cce000,
> rx_npktsp=3D0x0) at /usr/src/sys/dev/re/if_re.c:2386
> #26 0xffffffff808f1a16 in re_intr_msi (xsc=3D0xfffffe00e1cce000)
> at /usr/src/sys/dev/re/if_re.c:2682
> #27 0xffffffff80ba3d49 in intr_event_execute_handlers
> (ie=3D0xfffff800020fde00,
> p=3D<optimized out>) at /usr/src/sys/kern/kern_intr.c:1205
> #28 ithread_execute_handlers (ie=3D0xfffff800020fde00, p=3D<optimized out=
>)
> at /usr/src/sys/kern/kern_intr.c:1218
> #29 ithread_loop (arg=3Darg@entry=3D0xfffff800020fbf80)
> at /usr/src/sys/kern/kern_intr.c:1306
> #30 0xffffffff80ba03e0 in fork_exit (
> callout=3D0xffffffff80ba3ad0 <ithread_loop>,
> arg=3D0xfffff800020fbf80,
> frame=3D0xfffffe0104239f40) at
> /usr/src/sys/kern/kern_fork.c:1102
> #31 <signal handler called>
I had a ... vaguely-similar panic on one laptop, after updating sources
=66rom main-n256013-85d7875d4291 to main-n256025-91d6afe6e2a9. I placed
a screenshot of the backtrace at
https://www.catwhisker.org/~david/FreeBSD/head/n256025/console.jpg
The files updated were:
Updating 85d7875d4291..91d6afe6e2a9
Fast-forward
contrib/bsddialog/lib/lib_util.c | 7 +--
sys/arm64/arm64/identcpu.c | 85 +++++++++++++++++++++++++++++=
++++
sys/arm64/include/armreg.h | 30 ++++++++++++
sys/dev/alc/if_alc.c | 5 +-
sys/dev/hwpmc/hwpmc_logging.c | 21 ++++----
sys/dev/hwpmc/hwpmc_mod.c | 17 ++++---
sys/dev/iommu/iommu_gas.c | 13 ++++-
sys/fs/fdescfs/fdesc_vnops.c | 10 +++-
sys/kern/subr_smp.c | 4 +-
sys/kern/uipc_usrreq.c | 37 ++++++--------
sys/netinet/tcp_sack.c | 12 +++++
sys/sys/pmc.h | 4 ++
tests/sys/kern/unix_passfd_test.c | 37 ++++++++++----
usr.bin/gcore/elfcore.c | 29 ++---------
usr.sbin/bsdinstall/scripts/docsinstall | 3 +-
15 files changed, 223 insertions(+), 91 deletions(-)
Command exit status: 0
I noted that there was a subsequent commit to sys/netinet/tcp_sack.c
(231e0dd5d1fb7778b1cb285e5ebee5502d5ad253, to avoid a NULL dereference);
while I don't believe I was using SACK, I went ahead and hand-applied
that small change & rebuilt; that did not seem to help (as I got a
similar-looking panic after the rebuild).
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
"Putin is a paranoid dictator. Putin must go. He started a senseless war
and is leading Russia into a ditch." - Egor Polyakov & Alexandra Miroshniko=
va
See https://www.catwhisker.org/~david/publickey.gpg for my public key.
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