Date: Fri, 1 Jan 1999 10:14:36 -0800 (PST) From: Chris Timmons <skynyrd@opus.cts.cwu.edu> To: freebsd-current@FreeBSD.ORG Subject: odd mkdir & softdep death; coincidence? Message-ID: <Pine.BSF.3.96.990101100906.26439A-100000@opus.cts.cwu.edu>
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I've been happily building and installing worlds in -current (elf, elf
kernel) for some time on my ostensibly hardware-solid thrash machine.
Yesterday it crashed and by chance I noticed a recent call to free(3)
added to mkdir.c. I can't see how userland could affect this, so it is
probably a coincidence. This happened yesterday, and the
softupdates-enabled filesystem was implemented on a ccd device.
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x19
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf01db5dc
stack pointer = 0x10:0xf4616bd0
frame pointer = 0x10:0xf4616bdc
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 = 37724 (mkdir)
interrupt mask = bio
panic: from debugger
panic: from debugger
#0 boot (howto=260) at ../../kern/kern_shutdown.c:285
#1 0xf0147ef5 in panic (fmt=0xf021f514 "from debugger") at
../../kern/kern_shutdown.c:446
#2 0xf0127cdd in db_panic (addr=-266488356, have_addr=0, count=-1,
modif=0xf4616a50 "") at ../../ddb/db_command.c:432
#3 0xf0127c7d in db_command (last_cmdp=0xf0239ac8, cmd_table=0xf0239928,
aux_cmd_tablep=0xf024d838) at ../../ddb/db_command.c:332
#4 0xf0127d42 in db_command_loop () at ../../ddb/db_command.c:454
#5 0xf012a093 in db_trap (type=12, code=0) at ../../ddb/db_trap.c:71
#6 0xf01fa2c6 in kdb_trap (type=12, code=0, regs=0xf4616b94) at
../../i386/i386/db_interface.c:157
#7 0xf020438c in trap_fatal (frame=0xf4616b94, eva=25) at
../../i386/i386/trap.c:908
#8 0xf020406b in trap_pfault (frame=0xf4616b94, usermode=0, eva=25) at
../../i386/i386/trap.c:806
#9 0xf0203c82 in trap (frame={tf_es = 16, tf_ds = 16, tf_edi =
-259539968, tf_esi = -259741284, tf_ebp = -194941988,
tf_isp = -194942020, tf_ebx = 1, tf_edx = -253479424, tf_ecx =
-238359604, tf_eax = 284202, tf_trapno = 12, tf_err = 0,
tf_eip = -266488356, tf_cs = 8, tf_eflags = 66050, tf_esp =
-258222480, tf_ss = -255705984}) at ../../i386/i386/trap.c:437
#10 0xf01db5dc in pagedep_lookup (ip=0xf0e43600, lbn=0, flags=1,
pagedeppp=0xf4616c00) at ../../ufs/ffs/ffs_softdep.c:759
#11 0xf01dbe6f in softdep_setup_allocdirect (ip=0xf0e43600, lbn=0,
newblkno=1244167, oldblkno=0, newsize=1024, oldsize=0,
bp=0xf1caeaa8) at ../../ufs/ffs/ffs_softdep.c:1205
#12 0xf01d98eb in ffs_balloc (ap=0xf4616d24) at
../../ufs/ffs/ffs_balloc.c:175
#13 0xf01e80c4 in ufs_mkdir (ap=0xf4616e98) at vnode_if.h:1015
#14 0xf01e8f79 in ufs_vnoperate (ap=0xf4616e98) at
../../ufs/ufs/ufs_vnops.c:2303
#15 0xf016d9ce in mkdir (p=0xf451c2c0, uap=0xf4616f94) at vnode_if.h:611
#16 0xf020460f in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 18,
tf_esi = 1, tf_ebp = -272641184, tf_isp = -194940956,
tf_ebx = -272640740, tf_edx = -1, tf_ecx = 2, tf_eax = 136,
tf_trapno = 12, tf_err = 2, tf_eip = 134516284, tf_cs = 31,
tf_eflags = 514, tf_esp = -272641316, tf_ss = 39}) at
../../i386/i386/trap.c:1064
#17 0xf01fac1c in Xint0x80_syscall ()
#18 0x804823b in ?? ()
#19 0x80480e9 in ?? ()
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