Date: Fri, 12 Dec 2003 12:58:40 -0500 (EST) From: Robert Watson <rwatson@freebsd.org> To: Alexander Motin <mav@alkar.net> Cc: freebsd-current@freebsd.org Subject: netgraph calling VFS from network swi (was: Re: 5.2-RC fatal trap 12) Message-ID: <Pine.NEB.3.96L.1031212125624.19730A-100000@fledge.watson.org> In-Reply-To: <3FD9E5A9.3090009@alkar.net>
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On Fri, 12 Dec 2003, Alexander Motin wrote: > Same problem on other hardware but on system booted from same HDD: This is a really scary stack trace -- it looks like netgraph is calling into the kernel linker from the network swi, and that in turn is hitting VFS. I may have missed earlier messages in this thread, but do you have a precise list of userland activities you're performing to trigger this? It looks like you're doing something that causes netgraph to load additional modules... Which would probably not be such a bad thing if it happened in a different thread context. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Senior Research Scientist, McAfee Research > > Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 00 > fault virtual address = 0x0 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xc056cbd3 > stack pointer = 0x10:0xd2a3e79c > frame pointer = 0x10:0xd2a3e7b8 > 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 = 29 (swi1: net) > trap number = 12 > panic: page fault > cpuid = 0; > > (kgdb) bt > #0 0xc057601b in doadump () > #1 0xc0576661 in boot () > #2 0xc0576a3e in panic () > #3 0xc06d32cc in trap_fatal () > #4 0xc06d2f72 in trap_pfault () > #5 0xc06d2b83 in trap () > #6 0xc06bfd78 in calltrap () > #7 0xc05d2c2c in vref () > #8 0xc05cb7c8 in namei () > #9 0xc05ddc11 in vn_open_cred () > #10 0xc05dd9b3 in vn_open () > #11 0xc0568dd4 in linker_hints_lookup () > #12 0xc05692ea in linker_search_module () > #13 0xc05694cb in linker_load_module () > #14 0xc3de0a36 in ng_make_node () from /boot/kernel/netgraph.ko > #15 0xc3de2ab1 in ng_mkpeer () from /boot/kernel/netgraph.ko > #16 0xc3de4861 in ng_generic_msg () from /boot/kernel/netgraph.ko > #17 0xc3de44c5 in ng_apply_item () from /boot/kernel/netgraph.ko > #18 0xc3de6944 in ngintr () from /boot/kernel/netgraph.ko > #19 0xc05e99d9 in swi_net () > #20 0xc05631f2 in ithread_loop () > #21 0xc05621a4 in fork_exit () > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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