fatal kernel trap: exception = 0x380 (data segment exception) virtual address = 0xdeadc0dedeadc0de dsisr = 0x42000000 srr0 = 0xc000000002c1146c (0x91146c) srr1 = 0x9000000000009032 current msr = 0x9000000000009032 lr = 0xc000000002b29280 (0x829280) curthread = 0xc00000012b302000 pid = 1322, comm = dumpon asid: 15164 [ thread pid 1322 tid 100665 ] Stopped at 0xc000000002c1146c = m_tag_delete_chain+0x38: ld r4, r30, 0x0 db> bt Tracing pid 1322 tid 100665 td 0xc00000012b302000 0xc008003cb8d36f70: at 0xc000000002b2927c = malloc_type_list+0x14fc 0xc008003cb8d36ff0: at 0xc000000002ee0014 = uma_zfree_arg+0x58c 0xc008003cb8d370b0: at 0xc000000002b2a158 = netdump_mbuf_drain+0x120 0xc008003cb8d37130: at 0xc000000002dd1a00 = netdump_reinit+0xca8 0xc008003cb8d371e0: at 0xc0000000029b92f4 = fiodgname_buf_get_ptr+0x138 0xc008003cb8d37290: at 0xc000000002f9e068 = VOP_IOCTL_APV+0xc4 0xc008003cb8d37310: at 0xc000000002c772c4 = _vn_lock+0x3f0 0xc008003cb8d37430: at 0xc0000000029b487c = devfs_unmount_final+0x1fc 0xc008003cb8d37470: at 0xc000000002be4ba4 = kern_ioctl+0x390 0xc008003cb8d37530: at 0xc000000002be4e28 = sys_ioctl+0x168 0xc008003cb8d37660: at 0xc000000002f87634 = trap+0x9a8 0xc008003cb8d37790: at 0xc000000002f78b60 = powerpc_interrupt+0x110 0xc008003cb8d37820: user SC trap by 0x81052feb8: srr1=0x900000000000f032 r1=0xfffffbfffdf00 cr=0x24042042 xer=0 ctr=0x81052feb0 r2=0x81058b950 db>