Apr  2 17:19:29.174309 (XEN) Xen BUG at mm.c:221
Apr  2 17:19:29.178473 (XEN) CPU0: Unexpected Trap: Undefined Instruction
Apr  2 17:19:29.184037 (XEN) ----[ Xen-4.3-unstable  arm32  debug=y  Tainted:    C ]----
Apr  2 17:19:29.186113 (XEN) CPU:    0
Apr  2 17:19:29.189591 (XEN) PC:     0023c520 __bug+0x2c/0x44
Apr  2 17:19:29.193063 (XEN) CPSR:   200001da MODE:Hypervisor
Apr  2 17:19:29.198551 (XEN)      R0: 0025b70c R1: 00000000 R2: 00000000 R3: 00000fff
Apr  2 17:19:29.203649 (XEN)      R4: 00258140 R5: 002594d0 R6: 000000dd R7: 00000018
Apr  2 17:19:29.210694 (XEN)      R8: 7ffdfd50 R9: 0000000b R10:000001e0 R11:7ffdf70c R12:00000001
Apr  2 17:19:29.214061 (XEN) HYP: SP: 7ffdf704 LR: 0023c520
Apr  2 17:19:29.214768 (XEN)
Apr  2 17:19:29.216235 (XEN) HTTBR bfeca000
Apr  2 17:19:29.218191 (XEN) HDFAR f8820f00
Apr  2 17:19:29.219590 x(XEN) HIFAR 0
Apr  2 17:19:29.221688 (XEN) HPFAR 104810
Apr  2 17:19:29.223049 (XEN) HCR 00002835
Apr  2 17:19:29.224466 (XEN) HSR   0
Apr  2 17:19:29.226668 (XEN) VTTBR 10000bfdfe000
Apr  2 17:19:29.227314 (XEN)
Apr  2 17:19:29.230110 (XEN) DFSR 17 DFAR b6f05ee4
Apr  2 17:19:29.232199 (XEN) IFSR 7 IFAR b6ddb024
Apr  2 17:19:29.232855 (XEN)
Apr  2 17:19:29.237048 (XEN) Xen stack trace from sp=7ffdf704:
Apr  2 17:19:29.243968 (XEN)    00000001 7ffdf71c 00242b04 cf2d7e20 00000018 7ffdf73c 00244a64 7ffdf810
Apr  2 17:19:29.250900 (XEN)    00000005 cf2d7e20 7ffdf750 0000000b 0000000b 7ffdfd8c 0020a1d0 002cf60c
Apr  2 17:19:29.257903 (XEN)    002ce500 002ce500 00000000 4fb6a000 00000000 00000000 00000000 00000000
Apr  2 17:19:29.265481 (XEN)    00000000 0000001e 00020000 00063e4e 7ffef0f0 7ffd7000 ffffffff 4fb6b000
Apr  2 17:19:29.272414 (XEN)    00000000 00000000 00000000 00000000 00000000 0000003f 00020000 00063e4f
Apr  2 17:19:29.279368 (XEN)    7ffef1f8 7ffd7000 ffffffff 4fab0000 00000000 00000000 00000000 00000000
Apr  2 17:19:29.286326 (XEN)    00000000 0000000a 00020000 00063e50 7ffef050 7ffd7000 ffffffff 4fab1000
Apr  2 17:19:29.293291 (XEN)    00000000 00000000 00000000 00000000 00000000 0000000b 00020000 00063e51
Apr  2 17:19:29.301048 (XEN)    7ffef058 7ffd7000 ffffffffl 4fab2000 00000000 00000000 00000000 0000000
Apr  2 17:19:29.301096 0
Apr  2 17:19:29.307922 (XEN)    00000000 0000000c 00020000 00063e52 7ffef060 7ffd7000 ffffffff 4fab3000
Apr  2 17:19:29.314869 (XEN)    00000000 00000000 00000000 00000000 00000000 00000008 00020000 00063e53
Apr  2 17:19:29.322530 (XEN)    7ffef040 7ffd7000 ffffffff 4f9f8000 00000000 00000000 00000000 00000000
Apr  2 17:19:29.329497 (XEN)    00000000 0000000c 00020000 00063e52 7ffef060 7ffd7000 ffffffff 4f9f9000
Apr  2 17:19:29.336438 (XEN)    00000000 00000000 00000000 00000000 00000000 0000000b 00020000 00063e51
Apr  2 17:19:29.343382 (XEN)    7ffef058 7ffd7000 ffffffff 4f9fa000 00000000 00000000 00000000 00000000
Apr  2 17:19:29.350359 (XEN)    00000000 0000000a 00020000 00063e50 7ffef050 7ffd7000 ffffffff 4f9fb000
Apr  2 17:19:29.358207 (XEN)    00000000 00000000 00000000 00000000 00000000 0000003f 00020000 00063e4f
Apr  2 17:19:29.365178 (XEN)    7ffef1f8 7ffd7000 ffffffff 4f078000 00000000 00000000 00000000 00000000
Apr  2 17:19:29.372128 (XEN)    00000000 0000001e 00020000 00063e4e 7ffef0f0 7ffd7000 ffffffff ffffffff
Apr  2 17:19:29.378810 (XEN)    ffffffff ffffffff ffffffff ffffffff ffffffff  ffffffff ffffffff fffffff
Apr  2 17:19:29.379475 f
Apr  2 17:19:29.380931 (XEN) Xen call trace:
Apr  2 17:19:29.384459 (XEN)    [<0023c520>] __bug+0x2c/0x44
Apr  2 17:19:29.389315 (XEN)    [<00242b04>] unmap_domain_page+0x98/0xc8
Apr  2 17:19:29.393484 (XEN)    [<00244a64>] raw_copy_from_guest+0xa0/0xc0
Apr  2 17:19:29.398335 (XEN)    [<0020a1d0>] gnttab_unmap_grant_ref+0x9c/0x23c
Apr  2 17:19:29.403130 (XEN)    [<0020bc2c>] do_grant_table_op+0xaf8/0x2af8
Apr  2 17:19:29.408056 (XEN)    [<00246ce0>] do_trap_hypervisor+0x6d0/0xa8c
Apr  2 17:19:29.412225 (XEN)    [<00249130>] return_from_trap+0/0x4
Apr  2 17:19:29.413012 (XEN)