Date: Fri, 21 Apr 1995 16:52:01 +0200 From: Andras Olah <olah@cs.utwente.nl> To: current@FreeBSD.org Subject: Fatal trap 12: page fault while in kernel mode Message-ID: <25511.798475921@utis156.cs.utwente.nl>
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I keep on getting these using a current kernel for about a week or two. The system usually panics when I use Netscape (and/or perhaps tcpdump?) on it. I'm not at all sure that it's really netscape, just a guess. A few days ago I made a make world on the machine without any troubles. Here's the panic message from the log and a stack trace. The machine is a 486/66MHz, 8MB mem, 340MB IDE system. The system was supped at Wed Apr 19 05:01:02 1995 and I recompiled everything. Does anybody have a clue? Andras Apr 21 16:03:54 utip007 /kernel: Apr 21 16:03:54 utip007 /kernel: Apr 21 16:03:54 utip007 /kernel: Fatal trap 12: page fault while in kernel mode Apr 21 16:03:55 utip007 /kernel: fault virtual address = 0xf037d0fa Apr 21 16:03:55 utip007 /kernel: fault code = supervisor write, page not present Apr 21 16:03:55 utip007 /kernel: instruction pointer = 0x8:0xf016992d Apr 21 16:03:55 utip007 /kernel: code segment = base 0x0, limit 0xfffff, type 0x1b Apr 21 16:03:55 utip007 /kernel: = DPL 0, pres 1, def32 1, gran 1 Apr 21 16:03:55 utip007 /kernel: processor eflags = interrupt enabled, resume, IOPL = 0 Apr 21 16:03:55 utip007 /kernel: current process = 256 (netscape) Apr 21 16:03:55 utip007 /kernel: interrupt mask = net Apr 21 16:03:55 utip007 /kernel: panic: from debugger Apr 21 16:03:55 utip007 /kernel: (kgdb) bt #0 0xf0165ff8 in boot () #1 0xf0113175 in panic () #2 0xf010123d in db_panic () #3 0xf0101126 in db_command (-266851596, -266852012, -267382206) #4 0xf01012a5 in db_command_loop () #5 0xf0103c28 in db_trap () #6 0xf016328a in kdb_trap (12, 0, -272630724, -266949882) #7 0xf016ad97 in trap_fatal () #8 0xf016a914 in trap_pfault () #9 0xf016a5a3 in trap () #10 0xf0163b31 in exception:calltrap (-266750324, -267546876, -264790014, 65535) #11 0xf01721c4 in if_ed:ed_get_packet () #12 0xf0171d5a in edintr () #13 0xf0164a1d in exception:Xresume9 () #14 0xf013eeae in ip_output (-263761152, 0, -263767636, 0, 0) #15 0xf0143626 in tcp_output () #16 0xf014445e in tcp_usrreq () #17 0xf011cc92 in sosend () #18 0xf0115435 in soo_write () #19 0xf01144ff in write () #20 0xf016b005 in syscall () (kgdb)
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