root@bbb:~ # uname -a
FreeBSD bbb.highfell.local 12.0-CURRENT FreeBSD 12.0-CURRENT #7 r321601M: Thu Aug 17 22:13:21 PDT 2017     russellh@prescott.highfell.local:/usr/home/russellh/FreeBSD/rh-armv6/obj/arm.armv6/usr/home/russellh/FreeBSD/rh-armv6/src/sys/BEAGLEBONE-MMCCAM  arm


root@bbb:~ # panic: m_dup: bogus m_pkthdr.len
time = 1503192270
KDB: stack backtrace:
db_trace_self() at db_trace_self
         pc = 0xc067b73c  lr = 0xc025db7c (db_trace_self_wrapper+0x30)
         sp = 0xdce1dac0  fp = 0xdce1dbd8
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
         pc = 0xc025db7c  lr = 0xc03c1fc4 (vpanic+0xe0)
         sp = 0xdce1dbe0  fp = 0xdce1dc00
         r4 = 0x00000100  r5 = 0xdce1dc24
         r6 = 0xc071a3d2  r7 = 0x00000001
vpanic() at vpanic+0xe0
         pc = 0xc03c1fc4  lr = 0xc03c1ee4 (vpanic)
         sp = 0xdce1dc08  fp = 0xdce1dc1c
         r4 = 0xc071a3d2  r5 = 0xdce1dc24
         r6 = 0xc2d39c00  r7 = 0x000000b8
         r8 = 0x000000b8  r9 = 0xdce1dc48
        r10 = 0xc2f2e100
vpanic() at vpanic
         pc = 0xc03c1ee4  lr = 0xc0443454 (m_dup+0x33c)
         sp = 0xdce1dc24  fp = 0xdce1dc70
         r4 = 0xdce1dc1c  r5 = 0xc03c1ee4
         r6 = 0xdce1dc24  r7 = 0xffffffa4
         r8 = 0x000000b8  r9 = 0xc2d39c00
        r10 = 0xc2f2e100
m_dup() at m_dup+0x33c
         pc = 0xc0443454  lr = 0xc30c3bc8 (bridge_broadcast+0x1c4)
         sp = 0xdce1dc78  fp = 0xdce1dca0
         r4 = 0xc2729000  r5 = 0xc2729200
         r6 = 0xc2ca0c00  r7 = 0xc2ca1c00
         r8 = 0xc2728e00  r9 = 0x00000001
        r10 = 0xc272921c
bridge_broadcast() at bridge_broadcast+0x1c4
         pc = 0xc30c3bc8  lr = 0xc30c6960 (bridge_forward+0x238)
         sp = 0xdce1dca8  fp = 0xdce1dcd8
         r4 = 0x00000001  r5 = 0xc09ad6b4
         r6 = 0xc2729000  r7 = 0xc09abc44
         r8 = 0xc2ca1000  r9 = 0x00000000
        r10 = 0xc2729200
bridge_forward() at bridge_forward+0x238
         pc = 0xc30c6960  lr = 0xc30c5a5c (bridge_input+0x3c8)
         sp = 0xdce1dce0  fp = 0xdce1dd18
         r4 = 0xc2d9b806  r5 = 0x00000000
         r6 = 0xc2729000  r7 = 0xc2d9b800
         r8 = 0xc272921c  r9 = 0xc09ab804
        r10 = 0xc2d39c00
bridge_input() at bridge_input+0x3c8
         pc = 0xc30c5a5c  lr = 0xc04b5534 (ether_nh_input+0x2f0)
         sp = 0xdce1dd20  fp = 0xdce1dd40
         r4 = 0xc2ca1c00  r5 = 0xc2d39c00
         r6 = 0xc09ab890  r7 = 0xc2d39c10
         r8 = 0x00008590  r9 = 0xc0722cc0
        r10 = 0x00000005
ether_nh_input() at ether_nh_input+0x2f0
         pc = 0xc04b5534  lr = 0xc04bb094 (netisr_dispatch_src+0xb4)
         sp = 0xdce1dd48  fp = 0xdce1dd70
         r4 = 0xc09a02f4  r5 = 0xc2d39c00
         r6 = 0x00000637  r7 = 0x00000000
         r8 = 0xc0722c98 r10 = 0x00000005
netisr_dispatch_src() at netisr_dispatch_src+0xb4
         pc = 0xc04bb094  lr = 0xc04b4abc (ether_input+0x6c)
         sp = 0xdce1dd78  fp = 0xdce1dd98
         r4 = 0xc2ca1c00  r5 = 0xc2d39c00
         r6 = 0x00000000  r7 = 0x00000000
         r8 = 0xc0722c98  r9 = 0xc0722cc0
        r10 = 0xc2cd2c00
ether_input() at ether_input+0x6c
         pc = 0xc04b4abc  lr = 0xc06aa7a0 (cpsw_intr_rx+0xec)
         sp = 0xdce1dda0  fp = 0xdce1ddb0
         r4 = 0xc2ca1c00  r5 = 0x00000000
         r6 = 0xc2d39c00  r7 = 0x00000000
         r8 = 0xc09ab214  r9 = 0xc0706833
cpsw_intr_rx() at cpsw_intr_rx+0xec
         pc = 0xc06aa7a0  lr = 0xc038d850 (intr_event_execute_handlers+0xc4)
         sp = 0xdce1ddb8  fp = 0xdce1ddd8
         r4 = 0xc2a5f5c0  r5 = 0xc2cd2c48
         r6 = 0xc2a5f5ec  r7 = 0x00000000
intr_event_execute_handlers() at intr_event_execute_handlers+0xc4
         pc = 0xc038d850  lr = 0xc038dfa8 (ithread_loop+0x134)
         sp = 0xdce1dde0  fp = 0xdce1de20
         r4 = 0xc2cd2c70  r5 = 0x00000000
         r6 = 0xc2cd2c00  r7 = 0xc2c1c740
         r8 = 0xc2cd2c6c  r9 = 0xc07fc3a8
        r10 = 0xc2c03eac
ithread_loop() at ithread_loop+0x134
         pc = 0xc038dfa8  lr = 0xc038a9f0 (fork_exit+0x84)
         sp = 0xdce1de28  fp = 0xdce1de40
         r4 = 0xc2c1c740  r5 = 0xc2bc6730
         r6 = 0xc038de74  r7 = 0xc2c03ea0
         r8 = 0xdce1de48  r9 = 0x00000000
        r10 = 0x00000000
fork_exit() at fork_exit+0x84
         pc = 0xc038a9f0  lr = 0xc067e04c (swi_exit)
         sp = 0xdce1de48  fp = 0x00000000
         r4 = 0xc038de74  r5 = 0xc2c03ea0
         r6 = 0x00000000  r7 = 0x00000000
         r8 = 0x00000000 r10 = 0x00000000
swi_exit() at swi_exit
         pc = 0xc067e04c  lr = 0xc067e04c (swi_exit)
         sp = 0xdce1de48  fp = 0x00000000
KDB: enter: panic
[ thread pid 11 tid 100039 ]
Stopped at      $d.3:   ldrb    r15, [r15, r15, ror r15]!
db>