I recently experienced a bunch of panics and lock-ups while tcpdump-ing on an 8.1/amd64 machine over ssh. The net I was tracing was different from the one the ssh connection was on.
1. panic: tp->tlastm == NULL (in sshd) backtrace: breakpoint vpanic snprintf tcp_output tcp_send_wrapper sosend soo_write dofilewrite sys_write syscall 2. lock-up (in pid 0.3): wscons switching not working, numlock working, cursor flashes on keypresses. Could enter ddb: backtrace (before interrupt) sbappendadr udp4_sendup udp_input ipintr softint_dispatch DDB lost frame Xsoftintr I could cont from there and re-enter ddb, giving the same backtrace. 3. panic: m_copym: m == 0, len 152 [!COPYALL] (in squid) backtrace: breakpoint vpanic snprintf m_copym0 tcp_output tcp_send_wrapper sosend soo_write dofilewrite sys_write syscall I do have show reg output of all three incidents. Any clues?
