i386/36850

[Kris Kennaway]

The following reply was made to PR i386/36850; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: freebsd-gnats-submit at FreeBSD.org, ondrechenj at whiteice.com
Cc:  
Subject: Re: i386/36850
Date: Mon, 14 Jul 2003 02:36:39 -0700

 Including the contents of the URL referenced in the PR incase it
 disappears at some point.
 
 See also kern/37015 which is a similar panic in the write() syscall
 path.
 
 Kris
 
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 IdlePTD at phsyical address 0x004a1000
 initial pcb at physical address 0x003e0880
 panicstr: page fault
 panic messages:
 ---
 Fatal trap 12: page fault while in kernel mode
 fault virtual address	= 0x0
 fault code		= supervisor read, page not present
 instruction pointer	= 0x8:0xc030de4f
 stack pointer	        = 0x10:0xcde34bd4
 frame pointer	        = 0x10:0xcde34c04
 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		= 131 (ppp)
 interrupt mask		= tty 
 trap number		= 12
 panic: page fault
 
 syncing disks... 27 3 2 2 1 
 done
 Uptime: 48m14s
 
 dumping to dev #ad/0x20001, offset 531984
 dump ata0: resetting devices .. done
 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241 240 239 238 237 236 235 234 233 232 231 230 229 228 227 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129  128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 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  0xc01bc4f2 in dumpsys ()
 (kgdb) backtrace
 #0  0xc01bc4f2 in dumpsys ()
 #1  0xc01bc307 in boot ()
 #2  0xc01bc6e8 in poweroff_wait ()
 #3  0xc030f1fa in trap_fatal ()
 #4  0xc030eecd in trap_pfault ()
 #5  0xc030eab7 in trap ()
 #6  0xc030de4f in generic_bcopy ()
 #7  0xc01d2f03 in ttread ()
 #8  0xc047deb6 in ?? ()
 #9  0xc01f4743 in spec_read ()
 #10 0xc028dfec in ufsspec_read ()
 #11 0xc028e651 in ufs_vnoperatespec ()
 #12 0xc01f0898 in vn_read ()
 #13 0xc01cab6c in dofileread ()
 #14 0xc01caa32 in read ()
 #15 0xc030f4a9 in syscall2 ()
 #16 0xc0303b15 in Xint0x80_syscall ()
 #17 0x807001f in ?? ()
 #18 0x805aa93 in ?? ()
 #19 0x804cf98 in ?? ()
 #20 0x806c3f3 in ?? ()
 #21 0x806bfd3 in ?? ()
 #22 0x804b305 in ?? ()