smb1042: detached smb1106: detached smb1129: detached smb3: detached smb1043: detached smb1107: detached smb1130: detached smb4: detached smb1044: detached smb1108: detached smb1131: detached smb5: detached smb1045: detached smb1109: detached smb1132: detached smb6: detached smb1046: detached smb1110: detached smb1133: detached smb7: detached smb1047: detached smb1111: detached smb1134: detached smb8: detached smb1048: detached smb1112: detached smb1135: detached smb9: detached smb1049: detached smb1113: detached smb1136: detached smb10: detached smb1050: detached smb1114: detached smb1137: detached smbus0: detached [df5642] VETO: device_detach(smbus0)=0 <<< BUS DETACHED UNDER ITS OWNER (must be EBUSY=16) [df5642] VETO: post-detach softc=0 (NULL = freed under the owner) [df5642] RELFREE: calling smbus_release_bus(smbus0, fakesmbb0) with softc=0 ... Fatal user address access from kernel mode from df5642ctl at ffffffff805d8278 Fatal trap 12: page fault while in kernel mode cpuid = 3; lapic id = 3 fault virtual address = 0x0 fault code = supervisor read data, page not present instruction pointer = 0x8:0xffffffff805d8278 stack pointer = 0x10:0xfffff8011819b6d8 frame pointer = 0x10:0xfffff8011819b6f8 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 0, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 1551 current thread = pri 6 (CRIT) kernel: type 12 trap, code=0 CPU3 stopping CPUs: 0x00000037 stopped Stopped at smbus_release_bus+0x78: cmpq %r13,(%r12) db>