Date: 08 May 2003 23:03:58 +0000 From: Pav Lucistnik <pav@oook.cz> To: freebsd-current@freebsd.org Subject: panic in g_conf_provider() Message-ID: <1052435038.963.10.camel@pav.oook.cz>
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Hi, I just got odd panic on -CURRENT from May 5. I typed this command
under normal user:
$ sysctl -a | grep dump
and system promptly panicked with:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x40
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01e4426
stack pointer = 0x10:0xcd277bf8
frame pointer = 0x10:0xcd277c14
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 = 2 (g_event)
trap number = 12
panic: page fault
I can't reproduce it now, the given command works fine now. There was no
disc activity in background. Earlier today, I was using Smartmedia USB
card reader (da0 device over umass0), disconnected few hours ago.
(kgdb) bt
#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:238
#1 0xc0216338 in boot (howto=256) at
/usr/src/sys/kern/kern_shutdown.c:370
#2 0xc021662b in panic () at /usr/src/sys/kern/kern_shutdown.c:543
#3 0xc0349db2 in trap_fatal (frame=0xcd277bb8, eva=0) at
/usr/src/sys/i386/i386/trap.c:834
#4 0xc0349a92 in trap_pfault (frame=0xcd277bb8, usermode=0, eva=64) at
/usr/src/sys/i386/i386/trap.c:748
#5 0xc034968d in trap (frame=
{tf_fs = 24, tf_es = 16, tf_ds = 16, tf_edi = -1020581888, tf_esi
= -1070031968, tf_ebp = -853050348, tf_isp = -853050396, tf_ebx = 0,
tf_edx = 8192, tf_ecx = 4953, tf_eax = -1012442624, tf_trapno = 12,
tf_err = 0, tf_eip = -1071758298, tf_cs = 8, tf_eflags = 66178, tf_esp =
-1020581888, tf_ss = -1012442624}) at /usr/src/sys/i386/i386/trap.c:433
#6 0xc033a3c8 in calltrap () at {standard input}:96
#7 0xc01e4cd4 in g_conf_provider (sb=0xc0389ba0, pp=0x0) at
/usr/src/sys/geom/geom_dump.c:187
#8 0xc01e4e07 in g_conf_geom (sb=0xc32b2800, gp=0xc32b2800, pp=0x0,
cp=0x0) at /usr/src/sys/geom/geom_dump.c:218
#9 0xc01e4ea2 in g_conf_class (sb=0xc32b2800, mp=0xc3a75a00, gp=0x0,
pp=0x0, cp=0x0) at /usr/src/sys/geom/geom_dump.c:233
#10 0xc01e4f39 in g_conf_specific (sb=0xc32b2800, mp=0x0, gp=0x0,
pp=0x0, cp=0x0) at /usr/src/sys/geom/geom_dump.c:248
#11 0xc01e4f9d in g_confxml (p=0x0, flag=0) at
/usr/src/sys/geom/geom_dump.c:260
#12 0xc01e54b4 in one_event () at /usr/src/sys/geom/geom_event.c:179
#13 0xc01e5575 in g_run_events () at /usr/src/sys/geom/geom_event.c:199
#14 0xc01e63d5 in g_event_procbody () at
/usr/src/sys/geom/geom_kern.c:133
#15 0xc020365e in fork_exit (callout=0xc01e63b0 <g_event_procbody>,
arg=0x0, frame=0x0) at /usr/src/sys/kern/kern_fork.c:792
(kgdb) up 7
#7 0xc01e4cd4 in g_conf_provider (sb=0xc0389ba0, pp=0x0) at
/usr/src/sys/geom/geom_dump.c:187
187 pp->geom->dumpconf(sb, "\t ", pp->geom, NULL,
pp);
(kgdb) list
182 sbuf_printf(sb, "\t <mediasize>%jd</mediasize>\n",
183 (intmax_t)pp->mediasize);
184 sbuf_printf(sb, "\t <sectorsize>%u</sectorsize>\n",
pp->sectorsize);
185 if (pp->geom->dumpconf != NULL) {
186 sbuf_printf(sb, "\t <config>\n");
187 pp->geom->dumpconf(sb, "\t ", pp->geom, NULL,
pp);
188 sbuf_printf(sb, "\t </config>\n");
189 }
190 sbuf_printf(sb, "\t</provider>\n");
191 }
(kgdb) print pp
$1 = (struct g_provider *) 0x0
(kgdb) up
#8 0xc01e4e07 in g_conf_geom (sb=0xc32b2800, gp=0xc32b2800, pp=0x0,
cp=0x0) at /usr/src/sys/geom/geom_dump.c:218
218 g_conf_provider(sb, pp2);
(kgdb) list
213 }
214
215 LIST_FOREACH(pp2, &gp->provider, provider) {
216 if (pp != NULL && pp != pp2)
217 continue;
218 g_conf_provider(sb, pp2);
219 }
220 sbuf_printf(sb, " </geom>\n");
221 }
222
--
Pav Lucistnik <pav@oook.cz>
<Fufie> snow should be on the tv and in the mountains, not here
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