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Date:      Sun, 10 Oct 2021 11:56:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 259039] kernel panic in if_io_tqg_4
Message-ID:  <bug-259039-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259039

            Bug ID: 259039
           Summary: kernel panic in if_io_tqg_4
           Product: Base System
           Version: 13.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: iron.udjin@gmail.com

OS: stable/13-n247434-bcff2fdf8ee4

Fatal trap 12: page fault while in kernel mode
cpuid =3D 4; apic id =3D 04
fault virtual address   =3D 0x8
fault code              =3D supervisor read data, page not present
instruction pointer     =3D 0x20:0xffffffff80646df8
stack pointer          =3D 0x0:0xfffffe0201c61d10
frame pointer          =3D 0x0:0xfffffe0201c61d50
code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                        =3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
current process         =3D 0 (if_io_tqg_4)
trap number             =3D 12
panic: page fault
cpuid =3D 4
time =3D 1633865509
KDB: stack backtrace:
#0 0xffffffff805fa385 at kdb_backtrace+0x65
#1 0xffffffff805af417 at vpanic+0x187
#2 0xffffffff805af283 at panic+0x43
#3 0xffffffff8085c187 at trap_fatal+0x387
#4 0xffffffff8085c1df at trap_pfault+0x4f
#5 0xffffffff8085b87a at trap+0x25a
#6 0xffffffff808342d8 at calltrap+0x8
#7 0xffffffff80647007 at sbdrop+0x37
#8 0xffffffff80713946 at tcp_do_segment+0x2f86
#9 0xffffffff8070fdad at tcp_input_with_port+0x91d
#10 0xffffffff8071092b at tcp_input+0xb
#11 0xffffffff807042a4 at ip_input+0xc4
#12 0xffffffff806dc2ce at netisr_dispatch_src+0x9e
#13 0xffffffff806c1088 at ether_demux+0x118
#14 0xffffffff806c22ee at ether_nh_input+0x30e
#15 0xffffffff806dc2ce at netisr_dispatch_src+0x9e
#16 0xffffffff806c1459 at ether_input+0x39
#17 0xffffffff80719341 at tcp_lro_flush+0x321
Uptime: 13d12h0m25s
Dumping 23901 out of 196241
MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%

__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
55              __asm("movq %%gs:%P1,%0" : "=3Dr" (td) : "n" (offsetof(stru=
ct
pcpu,
(kgdb) bt
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=3D<optimized out>) at /usr/src/sys/kern/kern_shutdown=
.c:399
#2  0xffffffff805af015 in kern_reboot (howto=3D260) at
/usr/src/sys/kern/kern_shutdown.c:486
#3  0xffffffff805af486 in vpanic (fmt=3D0xffffffff808bd1a3 "%s", ap=3D<opti=
mized
out>) at /usr/src/sys/kern/kern_shutdown.c:919
#4  0xffffffff805af283 in panic (fmt=3D<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:843
#5  0xffffffff8085c187 in trap_fatal (frame=3D0xfffffe0201c61c50, eva=3D8) =
at
/usr/src/sys/amd64/amd64/trap.c:941
#6  0xffffffff8085c1df in trap_pfault (frame=3Dframe@entry=3D0xfffffe0201c6=
1c50,
usermode=3Dfalse, signo=3D<optimized out>, signo@entry=3D0x0, ucode=3D<opti=
mized out>,
ucode@entry=3D0x0) at /usr/src/sys/amd64/amd64/trap.c:760
#7  0xffffffff8085b87a in trap (frame=3D0xfffffe0201c61c50) at
/usr/src/sys/amd64/amd64/trap.c:438
#8  <signal handler called>
#9  sbcut_internal (sb=3Dsb@entry=3D0xfffff812a9e02260, len=3Dlen@entry=3D7=
94) at
/usr/src/sys/kern/uipc_sockbuf.c:1515
#10 0xffffffff80647007 in sbdrop (sb=3Dsb@entry=3D0xfffff812a9e02260, len=
=3D794) at
/usr/src/sys/kern/uipc_sockbuf.c:1624
#11 0xffffffff80713946 in tcp_do_segment (m=3D0xfffff808ffa67300, th=3D<opt=
imized
out>, so=3D<optimized out>, tp=3D0xfffffe04453ce950, drop_hdrlen=3D<optimiz=
ed out>,
tlen=3D<optimized out>, iptos=3D0 '\000') at /usr/src/sys/netinet/tcp_input=
.c:1852
#12 0xffffffff8070fdad in tcp_input_with_port (mp=3D<optimized out>,
offp=3D<optimized out>, proto=3D<optimized out>, port=3D<optimized out>,
port@entry=3D0) at /usr/src/sys/netinet/tcp_input.c:1400
#13 0xffffffff8071092b in tcp_input (mp=3D0xfffff812a9e02260, offp=3D0x31a,
proto=3D30) at /usr/src/sys/netinet/tcp_input.c:1496
#14 0xffffffff807042a4 in ip_input (m=3D0x0) at
/usr/src/sys/netinet/ip_input.c:834
#15 0xffffffff806dc2ce in netisr_dispatch_src (proto=3D1, source=3D<optimiz=
ed out>,
source@entry=3D0, m=3D0x0) at /usr/src/sys/net/netisr.c:1143
#16 0xffffffff806dc5bf in netisr_dispatch (proto=3D2850038368, m=3D0x1e) at
/usr/src/sys/net/netisr.c:1234
#17 0xffffffff806c1088 in ether_demux (ifp=3Difp@entry=3D0xfffff801062c5000,
m=3D0x31a) at /usr/src/sys/net/if_ethersubr.c:921
#18 0xffffffff806c22ee in ether_input_internal (ifp=3D0xfffff801062c5000,
m=3D0x31a) at /usr/src/sys/net/if_ethersubr.c:707
#19 ether_nh_input (m=3D<optimized out>) at /usr/src/sys/net/if_ethersubr.c=
:737
#20 0xffffffff806dc2ce in netisr_dispatch_src (proto=3Dproto@entry=3D5,
source=3D<optimized out>, source@entry=3D0, m=3D0x0, m@entry=3D0xfffff808ff=
a67300) at
/usr/src/sys/net/netisr.c:1143
#21 0xffffffff806dc5bf in netisr_dispatch (proto=3D2850038368, proto@entry=
=3D5,
m=3D0x1e, m@entry=3D0xfffff808ffa67300) at /usr/src/sys/net/netisr.c:1234
#22 0xffffffff806c1459 in ether_input (ifp=3D<optimized out>,
m=3D0xfffff808ffa67300) at /usr/src/sys/net/if_ethersubr.c:828
#23 0xffffffff80719341 in tcp_lro_flush (lc=3Dlc@entry=3D0xfffffe014d16a6b0,
le=3D0xfffffe015050e690) at /usr/src/sys/netinet/tcp_lro.c:1350
#24 0xffffffff80719e7b in tcp_lro_rx_done (lc=3D0xfffffe014d16a6b0) at
/usr/src/sys/netinet/tcp_lro.c:562
#25 tcp_lro_flush_all (lc=3Dlc@entry=3D0xfffffe014d16a6b0) at
/usr/src/sys/netinet/tcp_lro.c:1506
#26 0xffffffff806d42a2 in iflib_rxeof (rxq=3D<optimized out>, budget=3D<opt=
imized
out>) at /usr/src/sys/net/iflib.c:3056
#27 _task_fn_rx (context=3D<optimized out>) at /usr/src/sys/net/iflib.c:3988
#28 0xffffffff805f8dfd in gtaskqueue_run_locked
(queue=3Dqueue@entry=3D0xfffff80104cf8300) at
/usr/src/sys/kern/subr_gtaskqueue.c:371
#29 0xffffffff805f8a63 in gtaskqueue_thread_loop (arg=3D<optimized out>,
arg@entry=3D0xfffffe014d880068) at /usr/src/sys/kern/subr_gtaskqueue.c:547
#30 0xffffffff8056f269 in fork_exit (callout=3D0xffffffff805f89a0
<gtaskqueue_thread_loop>, arg=3D0xfffffe014d880068, frame=3D0xfffffe0201c62=
480) at
/usr/src/sys/kern/kern_fork.c:1084
#31 <signal handler called>

I don't know how to reproduce this panic.

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