Hi, finally had the time to test this patch (well I'm on FreeBSD 8.0-BETA2 #28 r195968M now which includes the patch), but VLC still crashes using SAP service discovery. But I also finally got a saved kernel dump, so here are the details: Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0x8 fault code = supervisor read, page not present instruction pointer = 0x20:0xc071c9a0 stack pointer = 0x28:0xc737983c frame pointer = 0x28:0xc73798cc 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 = 12 (swi4: clock) trap number = 12 panic: page fault cpuid = 1 Uptime: 2m14s Physical memory: 3551 MB Dumping 222 MB: 207 191 175 159 143 127 111 95 79 63 47 31 15 Reading symbols from /boot/kernel/snd_hda.ko...Reading symbols from /boot/kernel/snd_hda.ko.symbols...done. done. Loaded symbols for /boot/kernel/snd_hda.ko Reading symbols from /boot/kernel/sound.ko...Reading symbols from /boot/kernel/sound.ko.symbols...done. done. Loaded symbols for /boot/kernel/sound.ko Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done. done. Loaded symbols for /boot/kernel/linprocfs.ko Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done. done. Loaded symbols for /boot/kernel/linux.ko Reading symbols from /boot/kernel/i915.ko...Reading symbols from /boot/kernel/i915.ko.symbols...done. done. Loaded symbols for /boot/kernel/i915.ko Reading symbols from /boot/kernel/drm.ko...Reading symbols from /boot/kernel/drm.ko.symbols...done. done. Loaded symbols for /boot/kernel/drm.ko #0 doadump () at pcpu.h:246 246 __asm __volatile("movl %%fs:0,%0" : "=r" (td)); Some more details: (kgdb) list *0xc071c9a0 0xc071c9a0 is in lpoutput (/usr/src/sys/dev/ppbus/if_plip.c:669). 664 665 static __inline int 666 lpoutbyte(u_char byte, int spin, device_t ppbus) 667 { 668 669 ppb_wdtr(ppbus, txmith[byte]); 670 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 671 if (--spin == 0) 672 return (1); 673 ppb_wdtr(ppbus, txmitl[byte]); And the backtrace: (kgdb) bt #0 doadump () at pcpu.h:246 #1 0xc088c5c7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:419 #2 0xc088c8f2 in panic (fmt=Variable "fmt" is not available. ) at /usr/src/sys/kern/kern_shutdown.c:575 #3 0xc0bc75b3 in trap_fatal (frame=0xc73797fc, eva=8) at /usr/src/sys/i386/i386/trap.c:933 #4 0xc0bc7810 in trap_pfault (frame=0xc73797fc, usermode=0, eva=8) at /usr/src/sys/i386/i386/trap.c:846 #5 0xc0bc8223 in trap (frame=0xc73797fc) at /usr/src/sys/i386/i386/trap.c:528 #6 0xc0baad0b in calltrap () at /usr/src/sys/i386/i386/exception.s:165 #7 0xc071c9a0 in lpoutput (ifp=0xc782b400, m=0xc86f2400, dst=0xc7379a58, ro=0x0) at /usr/src/sys/dev/ppbus/if_plip.c:669 #8 0xc0a39018 in nd6_output_lle (ifp=0xc782b400, origifp=0xc782b400, m0=0xc86f2400, dst=0xc7379a58, rt0=0x0, lle=0x0, chain=0x0) at /usr/src/sys/netinet6/nd6.c:1914 #9 0xc0a3912d in nd6_output (ifp=0xc782b400, origifp=0xc782b400, m0=0xc86f2400, dst=0xc7379a58, rt0=0x0) at /usr/src/sys/netinet6/nd6.c:1691 #10 0xc0a33ac8 in ip6_output (m0=0xc7dab500, opt=0xc0dda6a0, ro=0xc7379a50, flags=1, im6o=0xc7379b30, ifpp=0xc7379b50, inp=0x0) at /usr/src/sys/netinet6/ip6_output.c:905 #11 0xc0a34833 in mld_dispatch_packet (m=Variable "m" is not available. ) at /usr/src/sys/netinet6/mld6.c:3074 #12 0xc0a34b48 in mld_dispatch_queue (ifq=0xc7379bdc, limit=0) at /usr/src/sys/netinet6/mld6.c:409 #13 0xc0a375e9 in mld_fasttimo () at /usr/src/sys/netinet6/mld6.c:1421 #14 0xc0a19588 in icmp6_fasttimo () at /usr/src/sys/netinet6/icmp6.c:2231 #15 0xc08e1d49 in pffasttimo (arg=0x0) at /usr/src/sys/kern/uipc_domain.c:522 #16 0xc089f50c in softclock (arg=0xc0dc1b80) at /usr/src/sys/kern/kern_timeout.c:411 #17 0xc08635eb in intr_event_execute_handlers (p=0xc755a7f8, ie=0xc75a0d80) at /usr/src/sys/kern/kern_intr.c:1165 #18 0xc0864b8b in ithread_loop (arg=0xc75591d0) at /usr/src/sys/kern/kern_intr.c:1178 #19 0xc0860e81 in fork_exit (callout=0xc0864b20 <ithread_loop>, arg=0xc75591d0, frame=0xc7379d38) at /usr/src/sys/kern/kern_fork.c:838 #20 0xc0baad80 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:270 (kgdb) up #1 0xc088c5c7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:419 419 doadump(); (kgdb) up #2 0xc088c8f2 in panic (fmt=Variable "fmt" is not available. ) at /usr/src/sys/kern/kern_shutdown.c:575 575 boot(bootopt); (kgdb) up #3 0xc0bc75b3 in trap_fatal (frame=0xc73797fc, eva=8) at /usr/src/sys/i386/i386/trap.c:933 933 panic("%s", trap_msg[type]); (kgdb) up #4 0xc0bc7810 in trap_pfault (frame=0xc73797fc, usermode=0, eva=8) at /usr/src/sys/i386/i386/trap.c:846 846 trap_fatal(frame, eva); (kgdb) up #5 0xc0bc8223 in trap (frame=0xc73797fc) at /usr/src/sys/i386/i386/trap.c:528 528 (void) trap_pfault(frame, FALSE, eva); (kgdb) up #6 0xc0baad0b in calltrap () at /usr/src/sys/i386/i386/exception.s:165 165 call trap Current language: auto; currently asm (kgdb) up #7 0xc071c9a0 in lpoutput (ifp=0xc782b400, m=0xc86f2400, dst=0xc7379a58, ro=0x0) at /usr/src/sys/dev/ppbus/if_plip.c:669 669 ppb_wdtr(ppbus, txmith[byte]); Current language: auto; currently c (kgdb) up #8 0xc0a39018 in nd6_output_lle (ifp=0xc782b400, origifp=0xc782b400, m0=0xc86f2400, dst=0xc7379a58, rt0=0x0, lle=0x0, chain=0x0) at /usr/src/sys/netinet6/nd6.c:1914 1914 error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst, NULL); (kgdb) up #9 0xc0a3912d in nd6_output (ifp=0xc782b400, origifp=0xc782b400, m0=0xc86f2400, dst=0xc7379a58, rt0=0x0) at /usr/src/sys/netinet6/nd6.c:1691 1691 return (nd6_output_lle(ifp, origifp, m0, dst, rt0, NULL, NULL)); (kgdb) up #10 0xc0a33ac8 in ip6_output (m0=0xc7dab500, opt=0xc0dda6a0, ro=0xc7379a50, flags=1, im6o=0xc7379b30, ifpp=0xc7379b50, inp=0x0) at /usr/src/sys/netinet6/ip6_output.c:905 905 error = nd6_output(ifp, origifp, m, dst, ro->ro_rt); (kgdb) up #11 0xc0a34833 in mld_dispatch_packet (m=Variable "m" is not available. ) at /usr/src/sys/netinet6/mld6.c:3074 3074 error = ip6_output(m0, &mld_po, NULL, IPV6_UNSPECSRC, &im6o, (kgdb) up #12 0xc0a34b48 in mld_dispatch_queue (ifq=0xc7379bdc, limit=0) at /usr/src/sys/netinet6/mld6.c:409 409 mld_dispatch_packet(m); (kgdb) up #13 0xc0a375e9 in mld_fasttimo () at /usr/src/sys/netinet6/mld6.c:1421 1421 mld_dispatch_queue(&scq, 0); (kgdb) up #14 0xc0a19588 in icmp6_fasttimo () at /usr/src/sys/netinet6/icmp6.c:2231 2231 mld_fasttimo(); (kgdb) up #15 0xc08e1d49 in pffasttimo (arg=0x0) at /usr/src/sys/kern/uipc_domain.c:522 522 (*pr->pr_fasttimo)(); (kgdb) up #16 0xc089f50c in softclock (arg=0xc0dc1b80) at /usr/src/sys/kern/kern_timeout.c:411 411 c_func(c_arg); (kgdb) up #17 0xc08635eb in intr_event_execute_handlers (p=0xc755a7f8, ie=0xc75a0d80) at /usr/src/sys/kern/kern_intr.c:1165 1165 ih->ih_handler(ih->ih_argument); (kgdb) up #18 0xc0864b8b in ithread_loop (arg=0xc75591d0) at /usr/src/sys/kern/kern_intr.c:1178 1178 intr_event_execute_handlers(p, ie); (kgdb) up #19 0xc0860e81 in fork_exit (callout=0xc0864b20 <ithread_loop>, arg=0xc75591d0, frame=0xc7379d38) at /usr/src/sys/kern/kern_fork.c:838 838 callout(arg, frame); (kgdb) up #20 0xc0baad80 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:270 270 call fork_exit Current language: auto; currently asm (kgdb) up Initial frame selected; you cannot go up. It really seems it has to do something with IPv6... Mat Bruce Simpson wrote: > Hi, > > If anyone is experiencing panics with IPv6 in the kernel, and > multicast applications active, please test this patch. I think some > folk here saw this with VLC. > > re_at_: If this patch is good (I'll try to test locally) then it should > go into HEAD ASAP. > > Some poorly behaved IPv6 multicast applications don't specify an > interface for the join, and this triggers a KASSERT I put in to catch > such corner cases. > > Multicast doesn't work unless apps are aware of the links active in > the system they're running on, and this is a glaring hole in the > Boost.ASIO API, sadly. This was caught by a Boost regression run on > ref8.freebsd.org. > > Thanks to simon_at_ for logging the panic from the cluster console servers. > > cheers, > BMS > > ------------------------------------------------------------------------ > > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"Received on Fri Jul 31 2009 - 05:47:49 UTC
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