[Xen-devel] xl serial console 'o' crashes Xen.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

This is a non-debug built of Xen 4.3-unstable and after having
one HVM guest launched I pressed 'o' for fun on the serial console
and go this:

This is a SandyBridge ES-1220 CPU (Lenovo ThinkServer (TS130 11051CU))

(XEN) domain1 IOMMU p2m table: 
(XEN) p2m table has 4 levels
(XEN) Assertion 'pfn_to_pdx(ma >> PAGE_SHIFT) < (DIRECTMAP_SIZE >> PAGE_SHIFT)' 
failed at /home/konrad/ssd/konrad/xtt-x86_64/bootstrap/xen/x:101
(XEN) ----[ Xen-4.3-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    0
(XEN) RIP:    e008:[<ffff82c48014c2e8>] map_vtd_domain_page+0x38/0x6d
(XEN) RFLAGS: 0000000000010216   CONTEXT: hypervisor
(XEN) rax: 0000000000000000   rbx: f000eef3f000e000   rcx: 0000000000000000
(XEN) rdx: 000f000eef3f000e   rsi: 000f000eef3f000e   rdi: f000eef3f000e000
(XEN) rbp: ffff82c4802bfd60   rsp: ffff82c4802bfd60   r8:  f000eef3f000e2c3
(XEN) r9:  00000000a589c275   r10: 00000000fffffffd   r11: ffff82c480224e40
(XEN) r12: 00000000000001ff   r13: ffff830000000000   r14: 0000000000000003
(XEN) r15: 0000008000000000   cr0: 000000008005003b   cr4: 00000000000426f0
(XEN) cr3: 00000000c6a70000   cr2: ffffffffff600400
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: e008
(XEN) Xen stack trace from rsp=ffff82c4802bfd60:
(XEN)    ffff82c4802bfdb0 ffff82c4801453b2 00000001802bfe00 0000000000000000
(XEN)    0000000000000200 0000000000000001 00000000000001ff ffff830000000000
(XEN)    0000000000000003 0000000000000000 ffff82c4802bfe00 ffff82c48014542f
(XEN)    0000000080303a20 0000002700000001 0000000000000004 ffff83022d9fa000
(XEN)    ffff82c480263180 ffff82c48023f16e ffff82c480248ea0 ffff82c480303a48
(XEN)    ffff82c4802bfe20 ffff82c4801454c8 ffff82c48023f16e ffff83022d9fa000
(XEN)    ffff82c4802bfe50 ffff82c4801421da ffff82c480277d40 000000000000006f
(XEN)    0000000000000000 ffff82c480303a60 ffff82c4802bfe80 ffff82c48011042c
(XEN)    ffff82c4802bfe80 ffff82c480277620 ffff82c480277620 0000000000000000
(XEN)    ffff82c4802bfe90 ffff82c48011046d ffff82c4802bfeb0 ffff82c4801272af
(XEN)    ffff82c480303ad0 ffff82c480303af0 ffff82c4802bfee0 ffff82c4801273d9
(XEN)    ffff82c480260f80 ffff82c4802b8000 ffff82c480260f80 ffff82c4802b8000
(XEN)    ffff82c4802bff10 ffff82c48015b5d5 0000000000026c00 ffff8300c6d4a000
(XEN)    ffff8300c6d4a000 ffffffffffffffff ffff82c4802bfdf0 0000000000026c00
(XEN)    0000000000000000 ffffffff81a00000 0000000000000000 ffffffff81a01ea8
(XEN)    ffffffff81a00010 ffffffff81a01e08 0000001931fed8c8 ffff880079a0e800
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0140000000000000 0000000000000082 0000beef0000beef ffffffff8107b3a6
(XEN)    0000beef0000beef 0000000000000246 ffffffff81a01ea8 000000000000beef
(XEN)    000000000000beef 000000000000beef 000000000000beef 000000000000beef
(XEN) Xen call trace:
(XEN)    [<ffff82c48014c2e8>] map_vtd_domain_page+0x38/0x6d
(XEN)    [<ffff82c4801453b2>] vtd_dump_p2m_table_level+0x2a/0xef
(XEN)    [<ffff82c48014542f>] vtd_dump_p2m_table_level+0xa7/0xef
(XEN)    [<ffff82c4801454c8>] vtd_dump_p2m_table+0x51/0x58
(XEN)    [<ffff82c4801421da>] iommu_dump_p2m_table+0xb8/0xca
(XEN)    [<ffff82c48011042c>] handle_keypress+0x70/0x9c
(XEN)    [<ffff82c48011046d>] keypress_action+0x15/0x17
(XEN)    [<ffff82c4801272af>] do_tasklet_work+0x8e/0xc6
(XEN)    [<ffff82c4801273d9>] do_tasklet+0x66/0x96
(XEN)    [<ffff82c48015b5d5>] idle_loop+0x6e/0x75
(XEN)    
(XEN) 
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Assertion 'pfn_to_pdx(ma >> PAGE_SHIFT) < (DIRECTMAP_SIZE >> PAGE_SHIFT)' 
failed at 
/home/konrad/ssd/konrad/xtt-x86_64/bootstra****************************************
(XEN) 
(XEN) Manual reset required ('noreboot' specified)

Any ideas?


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