Date: Tue, 16 Sep 2014 11:17:38 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 193681] New: kernel panic: dhclient NULL pointer in ether_output_frame() when using dummynet at layer2 Message-ID: <bug-193681-8@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193681 Bug ID: 193681 Summary: kernel panic: dhclient NULL pointer in ether_output_frame() when using dummynet at layer2 Product: Base System Version: 11.0-CURRENT Hardware: Any OS: Any Status: Needs Triage Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: kate@elide.org # ifconfig bridge0 bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 ether 9e:e1:ad:03:c9:45 id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200 root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0 member: arge1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP> ifmaxaddr 0 port 6 priority 128 path cost 2000000 member: arge0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP> ifmaxaddr 0 port 5 priority 128 path cost 200000 # # # sysctl net.link.ether.ipfw=1 net.link.ether.ipfw: 0 -> 1 # sysctl net.link.bridge.ipfw=1 net.link.bridge.ipfw: 0 -> 1 # ipfw add 100 pipe 1 ip from any to any layer2 00100 pipe 1 ip from any to any layer2 # ipfw pipe 1 config # # # dhclient arge0 DHCPDISCOVER on arge0 to 255.255.255.255 port 67 interval 6 Trap cause = 2 (TLB miss (load or instr. fetch) - kernel mode) [ thread pid 11 tid 100024 ] Stopped at ether_output_frame+0x50: lw v0,680(s0) db> db> db> db> db> bt Tracing pid 11 tid 100024 td 0x8077b000 db_trace_thread+30 (?,?,?,?) ra c232f58800000018 sp 0 sz 0 80085a94+114 (0,?,ffffffff,?) ra c232f5a000000020 sp 100000000 sz 1 80085170+388 (?,?,?,?) ra c232f5c0000000a8 sp 0 sz 0 db_command_loop+70 (?,?,?,?) ra c232f66800000018 sp 0 sz 0 80087cb0+f4 (?,?,?,?) ra c232f680000001a8 sp 0 sz 0 kdb_trap+110 (?,?,?,?) ra c232f82800000030 sp 0 sz 0 trap+13c0 (?,?,?,?) ra c232f858000000c0 sp 0 sz 0 MipsKernGenException+134 (805823b4,8077b000,40000000,0) ra c232f918000000c8 sp 100000001 sz 1 ether_output_frame+50 (?,80995900,?,?) ra c232f9e000000020 sp 1 sz 0 8039d150+14c (?,?,?,?) ra c232fa0000000030 sp 0 sz 0 dummynet_io+454 (?,?,?,?) ra c232fa3000000038 sp 0 sz 0 ipfw_check_frame+290 (?,?,?,?) ra c232fa6800000140 sp 0 sz 0 pfil_run_hooks+9c (?,?,?,?) ra c232fba800000060 sp 0 sz 0 ether_demux+50 (?,80995900,?,?) ra c232fc0800000028 sp 1 sz 0 802f9814+4e0 (80995900,?,?,?) ra c232fc3000000030 sp 100000000 sz 0 netisr_dispatch_src+f0 (?,?,?,?) ra c232fc6000000038 sp 0 sz 0 netisr_dispatch+14 (?,?,?,?) ra c232fc9800000018 sp 0 sz 0 802f941c+20 (?,?,?,?) ra c232fcb000000018 sp 0 sz 0 802f5d4c+3bc (?,80d74e00,?,?) ra c232fcc800000038 sp 1 sz 0 802f9814+40c (80d74e00,?,?,?) ra c232fd0000000030 sp 100000000 sz 0 netisr_dispatch_src+f0 (?,?,?,?) ra c232fd3000000038 sp 0 sz 0 netisr_dispatch+14 (?,?,?,?) ra c232fd6800000018 sp 0 sz 0 802f941c+20 (?,?,?,?) ra c232fd8000000018 sp 0 sz 0 80450f4c+348 (?,?,?,?) ra c232fd9800000048 sp 0 sz 0 intr_event_execute_handlers+1c0 (?,?,?,?) ra c232fde000000030 sp 0 sz 0 801e7344+b4 (?,?,?,?) ra c232fe1000000048 sp 0 sz 0 fork_exit+a0 (?,?,?,?) ra c232fe5800000028 sp 0 sz 0 fork_trampoline+10 (?,?,?,?) ra c232fe8000000000 sp 0 sz 0 pid 11 db> db> show reg at 0 v0 0x80995900 v1 0 a0 0x805823b4 pfil_lock a1 0x8077b000 a2 0x40000000 a3 0 t0 0 t1 0 t2 0 t3 0x807081e0 t4 0 t5 0 t6 0 t7 0 s0 0 s1 0x80995900 s2 0 s3 0x4b3cc420 s4 0x804913a0 tcprexmtthresh+0x43c s5 0x4 _DYNAMIC_LINKING+0x3 s6 0x805820a0 link_pfil_hook s7 0xc232fc34 t8 0x1c _DYNAMIC_LINKING+0x1b t9 0x4055ce10 k0 0xc232fbc0 k1 0x80560120 pcpu_space+0x120 gp 0 sp 0xc232f9e0 s8 0x808c3074 ra 0x8039d29c dn_enqueue+0x6bc sr 0xcc03 _DYNAMIC_LINKING+0xcc02 lo 0x7c389600 hi 0x2916c bad 0x2a8 _DYNAMIC_LINKING+0x2a7 cs 0x8 _DYNAMIC_LINKING+0x7 pc 0x802f94e8 ether_output_frame+0x50 ether_output_frame+0x50: lw v0,680(s0) db> According to kdb, ether_output_frame+0x50 is: (kgdb) list *ether_output_frame+0x50 0x802f94e8 is in ether_output_frame (/usr/home/kate/src/freebsd/sys/net/if_ethersubr.c:374). which is: return ((ifp->if_transmit)(ifp, m)); I am using a Carambola 2, with 11.0-CURRENT r269949 built using Adrian's freebsd-wifi-build. I've no reason to believe this is specific to mips, but I don't have any other architectures around to test. -- You are receiving this mail because: You are the assignee for the bug.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-193681-8>