Bug 13087

IdlePTD 3018752
initial pcb at 26e100
panicstr: page fault
panic messages:
---
panic: m_copym

syncing disks...

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x2a
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc015a515
stack pointer           = 0x10:0xc024d08c
frame pointer           = 0x10:0xc024d0bc
code segment            = base rx0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = Idle
interrupt mask          = bio
trap number             = 12
panic: page fault

dumping to dev (3,131073), offset 262168
dump 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 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
---
#0  boot (howto=260) at ../../kern/kern_shutdown.c:291
291                     dumppcb.pcb_cr3 = rcr3();

(kgdb) where
#0  boot (howto=260) at ../../kern/kern_shutdown.c:291
#1  0xc01392d9 in panic (fmt=0xc024464f "page fault")
    at ../../kern/kern_shutdown.c:505
#2  0xc021149e in trap_fatal (frame=0xc024d04c, eva=42)
    at ../../i386/i386/trap.c:907
#3  0xc0211151 in trap_pfault (frame=0xc024d04c, usermode=0, eva=42)
    at ../../i386/i386/trap.c:800
#4  0xc0210dbf in trap (frame={tf_fs = -1071382512, tf_es = -1071382512,
      tf_ds = -1071841264, tf_edi = 0, tf_esi = -1060157696,
      tf_ebp = -1071329092, tf_isp = -1071329160, tf_ebx = -1071328976,
      tf_edx = 1074315328, tf_ecx = 1, tf_eax = 0, tf_trapno = 12, tf_err = 0,
      tf_eip = -1072323307, tf_cs = 8, tf_eflags = 66050,
      tf_esp = -1071328976, tf_ss = -1060157696}) at ../../i386/i386/trap.c:426
#5  0xc015a515 in getblk (vp=0xc7c63ec0, blkno=196688, size=8192, slpflag=0,
    slptimeo=0) at ../../kern/vfs_bio.c:1996
#6  0xc0158a26 in bread (vp=0xc7c63ec0, blkno=196688, size=8192, cred=0x0,
    bpp=0xc024d130) at ../../kern/vfs_bio.c:477
#7  0xc01cc86a in ffs_update (vp=0xc876aac0, waitfor=0)
    at ../../ufs/ffs/ffs_inode.c:98
#8  0xc01d5ef2 in ffs_fsync (ap=0xc024d190) at ../../ufs/ffs/ffs_vnops.c:264
#9  0xc01d447f in ffs_sync (mp=0xc09e8c00, waitfor=2, cred=0xc074a880,
    p=0xc0282a40) at vnode_if.h:499
#10 0xc016259f in sync (p=0xc0282a40, uap=0x0) at ../../kern/vfs_syscalls.c:543
#11 0xc0138d7f in boot (howto=256) at ../../kern/kern_shutdown.c:207
#12 0xc01392d9 in panic (fmt=0xc022dd64 "m_copym")
    at ../../kern/kern_shutdown.c:505
#13 0xc01518bf in m_copym (m=0xc07e7f80, off0=1460, len=934, wait=1)
    at ../../kern/uipc_mbuf.c:457
#14 0xc0189e7f in tcp_output (tp=0xc7bff840) at ../../netinet/tcp_output.c:511
#15 0xc018911a in tcp_input (m=0xc07e6e00, iphlen=20)
    at ../../netinet/tcp_input.c:1763
#16 0xc018492c in ip_input (m=0xc07e6e00) at ../../netinet/ip_input.c:679
#17 0xc018498b in ipintr () at ../../netinet/ip_input.c:706

Fix: 

not sure
How-To-Repeat: not sure