Date: Wed, 1 Aug 2001 17:41:09 +0400 (MSD) From: "Eugene L. Vorokov" <vel@bugz.infotecs.ru> To: freebsd-hackers@freebsd.org Subject: crash report Message-ID: <200108011341.f71DfAO00453@bugz.infotecs.ru>
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--ELM996673269-424-0_
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Hello,
here's my crash dump, something related to mbufs. If more information is
needed, tell me what to do, I'll provide it. This usually happens (but not
always) when someone is downloading something huge from ftp server on this
machine.
Regards,
Eugene
--ELM996673269-424-0_
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vel@bugz:/home/vel # uname -r
4.2-RELEASE
vel@bugz:/home/vel # gdb -k
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd".
(kgdb) symbol-file /kernel.debug
Reading symbols from /kernel.debug...done.
(kgdb) exec-file /kernel
(kgdb) core-file /var/crash/vmcore.0
IdlePTD 3186688
initial pcb at 291a40
panicstr: from debugger
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x60c0ff00
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc015b230
stack pointer = 0x10:0xc0271908
frame pointer = 0x10:0xc0271924
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = Idle
interrupt mask = net tty
panic: from debugger
panic: from debugger
Uptime: 3h11m4s
dumping to dev #ad/0x20001, offset 131072
dump ata0: resetting devices .. done
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
---
#0 dumpsys () at ../../kern/kern_shutdown.c:469
469 if (dumping++) {
(kgdb) where
#0 dumpsys () at ../../kern/kern_shutdown.c:469
#1 0xc014038b in boot (howto=260) at ../../kern/kern_shutdown.c:309
#2 0xc0140721 in panic (fmt=0xc02477d4 "from debugger") at ../../kern/kern_shutdown.c:556
#3 0xc011d879 in db_panic (addr=-1072319952, have_addr=0, count=1, modif=0xc0271774 "") at ../../ddb/db_command.c:433
#4 0xc011d819 in db_command (last_cmdp=0xc0272b38, cmd_table=0xc0272998, aux_cmd_tablep=0xc028df30) at ../../ddb/db_command.c:333
#5 0xc011d8de in db_command_loop () at ../../ddb/db_command.c:455
#6 0xc011f9eb in db_trap (type=12, code=0) at ../../ddb/db_trap.c:71
#7 0xc022643a in kdb_trap (type=12, code=0, regs=0xc02718c8) at ../../i386/i386/db_interface.c:158
#8 0xc0234d0c in trap_fatal (frame=0xc02718c8, eva=1623260928) at ../../i386/i386/trap.c:946
#9 0xc02349e5 in trap_pfault (frame=0xc02718c8, usermode=0, eva=1623260928) at ../../i386/i386/trap.c:844
#10 0xc0234587 in trap (frame={tf_fs = -970522608, tf_es = -1061421040, tf_ds = -970522608, tf_edi = -1067662336,
tf_esi = 6423552, tf_ebp = -1071179484, tf_isp = -1071179532, tf_ebx = 1, tf_edx = 1623260928, tf_ecx = 949,
tf_eax = 6423552, tf_trapno = 12, tf_err = 0, tf_eip = -1072319952, tf_cs = 8, tf_eflags = 66054, tf_esp = -970499232,
tf_ss = -971330368}) at ../../i386/i386/trap.c:443
#11 0xc015b230 in m_copym (m=0xc0627000, off0=7693, len=150, wait=1) at ../../kern/uipc_mbuf.c:621
#12 0xc019a521 in tcp_output (tp=0xc6275b60) at ../../netinet/tcp_output.c:590
#13 0xc0199719 in tcp_input (m=0xc059f100, off0=20, proto=6) at ../../netinet/tcp_input.c:2220
#14 0xc0194717 in ip_input (m=0xc059f100) at ../../netinet/ip_input.c:731
#15 0xc0194777 in ipintr () at ../../netinet/ip_input.c:759
#16 0xc02281e5 in swi_net_next ()
(kgdb) frame 11
#11 0xc015b230 in m_copym (m=0xc0627000, off0=7693, len=150, wait=1) at ../../kern/uipc_mbuf.c:621
621 n->m_pkthdr.len -= off0;
(kgdb) p n->m_pkthdr.len
There is no member named m_pkthdr.
(kgdb) p n
$1 = (struct mbuf *) 0x67063a
(kgdb) p off0
$2 = 7693
(kgdb) up
#12 0xc019a521 in tcp_output (tp=0xc6275b60) at ../../netinet/tcp_output.c:590
590 m->m_next = m_copy(so->so_snd.sb_mb, off, (int) len);
(kgdb) p so->so_snd.sb_mb
$3 = (struct mbuf *) 0xc0623c00
(kgdb) p off
$4 = 7693
(kgdb) p len
$5 = 1099
(kgdb) up
#13 0xc0199719 in tcp_input (m=0xc059f100, off0=20, proto=6) at ../../netinet/tcp_input.c:2220
2220 (void) tcp_output(tp);
(kgdb) p tp
$6 = (struct tcpcb *) 0xc6275b60
(kgdb)
--ELM996673269-424-0_--
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