Date: Tue, 16 Sep 2014 11:22:50 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 193681] kernel panic: dhclient NULL pointer in ether_output_frame() when using dummynet at layer2 Message-ID: <bug-193681-8-rnRqOA9BJc@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-193681-8@https.bugs.freebsd.org/bugzilla/> References: <bug-193681-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193681 --- Comment #2 from Kate <kate@elide.org> --- In both cases, I can confirm the presence of dummynet's pipe at layer2 is requisite for producing the symptoms: # # sysctl net.link.ether.ipfw=1 net.link.ether.ipfw: 0 -> 1 # sysctl net.link.bridge.ipfw=1 net.link.bridge.ipfw: 0 -> 1 # # dhclient arge0 DHCPDISCOVER on arge0 to 255.255.255.255 port 67 interval 3 DHCPOFFER from 10.0.0.1 DHCPREQUEST on arge0 to 255.255.255.255 port 67 DHCPACK from 10.0.0.1 bound to 10.0.0.12 -- renewal in 300 seconds. # # # ps auxww|grep dhclient root 281 1.0 3.1 10644 2004 u0 S 7:17PM 0:00.04 grep dhclient root 268 0.0 1.8 10428 1180 - Is 7:16PM 0:00.02 dhclient: arge0 [priv] (dhclient) _dhcp 276 0.0 1.6 10428 1032 - Is 7:16PM 0:00.00 dhclient: arge0 (dhclient) # kill 268 # kill 276 # # 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 DHCPREQUEST on arge0 to 255.255.255.255 port 67 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> -- You are receiving this mail because: You are the assignee for the bug.
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