Xen project Mailing List

Re: [Xen-devel] PaX Security w/ Kernel.org DomU 2.6.31.7

To: Ian Campbell <Ian.Campbell@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>

From: Andrew Lyon <andrew.lyon@xxxxxxxxx>

Date: Mon, 4 Jan 2010 20:18:12 +0000

Cc:

Delivery-date: Mon, 04 Jan 2010 12:18:40 -0800

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List-id: Xen developer discussion <xen-devel.lists.xensource.com>

On Mon, Jan 4, 2010 at 7:47 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote: > On Mon, 2010-01-04 at 19:13 +0000, Andrew Lyon wrote: >> Daft question, how can I check if the Xen I am running was build with >> debug=y or not? > > Not daft at all, I've got no idea... I think it is printed as part of > Xen's oops messages but that's not terribly useful if you haven't got > one. > > Aha, Xen's "d" debug key includes debug=<y|n> in its output. Not > terribly elegant but it works... > > Ian. > > Thanks Ian, indeed it does show if Xen was built with debug, unfortunately it also crashed the entire system, and although there was a message "Reboot in 5 seconds" it did not reboot :(, I will see if I can replicate this but I believe I tested all of the Xen debug keys recently as I discovered that dumping dom0 registers triggered the watchdog and submitted a patch to fix that. Running Xen 3.4.2, here is the log d (XEN) 'd' pressed -> dumping registers (XEN) (XEN) *** Dumping CPU5 host state: *** (XEN) ----[ Xen-3.4.2 x86_64 debug=y Not tainted ]---- (XEN) CPU: 5 (XEN) RIP: e008:[<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) RFLAGS: 0000000000010292 CONTEXT: hypervisor (XEN) rax: 0000000000000000 rbx: 0000000000000064 rcx: 0000000000000000 (XEN) rdx: 0000000000000000 rsi: 000000000000000a rdi: 0000000000000000 (XEN) rbp: ffff83043ff97c48 rsp: ffff83043ff97c38 r8: 0000000000000004 (XEN) r9: 0000000000000004 r10: 00000000fffffffc r11: 0000000000000001 (XEN) r12: ffff83043ff97dd8 r13: ffff828c80203b78 r14: 0000000000000282 (XEN) r15: ffff83043ff97dd8 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 00000000bfc6c000 cr2: 00007f5cf492d8d0 (XEN) ds: 002b es: 002b fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff83043ff97c38: (XEN) ffff83043ff97dd8 0000000000000064 ffff83043ff97c88 ffff828c8010e1bc (XEN) ffff83043ff97c78 0000000000000064 ffff83043ff97dd8 ffff828c80203b78 (XEN) 0000000000000282 ffff83043ff97dd8 ffff83043ff97ca8 ffff828c8010e34b (XEN) ffff83043ff97dd8 0000000000000064 ffff83043ff97cb8 ffff828c80127d98 (XEN) ffff83043ff97cd8 ffff828c80127e65 ffff828c80203b00 ffff828c80127ddc (XEN) ffff83043ff97d28 ffff828c8012924e ffff83043ff97cf8 ffff828c8012859d (XEN) 64ff83043ff97d28 0000000000000061 ffff828c80284340 ffff828c80203b00 (XEN) ffff83043ff97dd8 ffff828c80284368 ffff83043ff97d58 ffff828c8012885c (XEN) ffff828c80294f80 ffff83043ff97dd8 ffff83043ff97f28 ffff828c8027e900 (XEN) ffff83043ff97dc8 ffff828c80148d99 00000000000000f1 0000000000000005 (XEN) 0000000000000006 ffff828c80294fa4 000000f18011cb8e 0000000000000005 (XEN) 0000000000000000 000000000072f524 000000000072ef9d ffff83042e1d35f0 (XEN) ffff83042e1d3590 ffff828c8021a760 00007cfbc0068207 ffff828c801423b6 (XEN) ffff828c8021a760 ffff83042e1d3590 ffff83042e1d35f0 000000000072ef9d (XEN) ffff83043ff97ed0 000000000072f524 000052b9b64e72e4 ffff830093724060 (XEN) 0000000000000006 0000000000000004 000000000072f524 0000000000000001 (XEN) 0000000000001008 0000000000000001 0000000000000000 000000f100000000 (XEN) ffff828c801791df 000000000000e008 0000000000000283 ffff83043ff97e80 (XEN) 000000000000e010 ffff828c8027e900 ffff828c8027f900 ffff83043ff97ed0 (XEN) 000000008011af48 ffffffffffffffff ffff83043ff97f28 ffff83043ff97f28 (XEN) Xen call trace: (XEN) [<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) [<ffff828c8010e1bc>] dump_registers+0x5d/0x135 (XEN) [<ffff828c8010e34b>] handle_keypress+0x76/0x9b (XEN) [<ffff828c80127d98>] __serial_rx+0x16/0x5a (XEN) [<ffff828c80127e65>] serial_rx+0x89/0x8e (XEN) [<ffff828c8012924e>] serial_rx_interrupt+0xa9/0xbf (XEN) [<ffff828c8012885c>] ns16550_interrupt+0x47/0x61 (XEN) [<ffff828c80148d99>] do_IRQ+0x3e7/0x42e (XEN) [<ffff828c801423b6>] common_interrupt+0x26/0x30 (XEN) [<ffff828c801791df>] acpi_processor_idle+0x1fe/0x42f (XEN) [<ffff828c8013e7db>] idle_loop+0xbe/0xc5 (XEN) (XEN) *** Dumping CPU5 guest state: *** (XEN) No guest context (CPU is idle). (XEN) (XEN) *** Dumping CPU0 host state: *** (XEN) ----[ Xen-3.4.2 x86_64 debug=y Not tainted ]---- (XEN) CPU: 0 (XEN) RIP: e008:[<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) RFLAGS: 0000000000010092 CONTEXT: hypervisor (XEN) rax: ffff83043ff97bf8 rbx: 0000000000a13d97 rcx: 0000000000000001 (XEN) rdx: ffff828c8027e900 rsi: ffff83043ff97bf8 rdi: 0000000000000000 (XEN) rbp: ffff828c80267db8 rsp: ffff828c80267da8 r8: ffff828c8010e0e7 (XEN) r9: 0000000000000006 r10: ffff828c8023c560 r11: 000052b9d8788566 (XEN) r12: 0000000000a13779 r13: ffff83042e1d8210 r14: ffff83042e1d81b0 (XEN) r15: ffff828c8021a760 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 0000000080804000 cr2: 00007f9695f32315 (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff828c80267da8: (XEN) 00000000000000ff 0000000000a13d97 ffff828c80267dc8 ffff828c8015942c (XEN) 00007d737fd98207 ffff828c80143470 ffff828c8021a760 ffff83042e1d81b0 (XEN) ffff83042e1d8210 0000000000a13779 ffff828c80267ed0 0000000000a13d97 (XEN) 000052b9d8788566 ffff828c8023c560 0000000000000006 0000000000000004 (XEN) 0000000000a13d97 0000000000000001 0000000000001008 0000000000000001 (XEN) 0000000000000000 000000fb00000000 ffff828c801791df 000000000000e008 (XEN) 0000000000000287 ffff828c80267e80 000000000000e010 ffff828c8027e900 (XEN) ffff828c8027f900 ffff828c80267ed0 000000008011af48 ffffffffffffffff (XEN) ffff828c80267f28 ffff828c80267f28 ffff828c8027ad80 ffff828c8027e900 (XEN) ffff828c8021a760 ffff828c80267f20 ffff828c8013e7db ffff828c8011af79 (XEN) ffff828c80267f28 ffff828c8023c5b0 ffff8300bfafc000 0000000000000000 (XEN) ffff8300beb62000 000052b9d6ab2f39 ffff828c8023c100 ffff828c80267dc8 (XEN) 0000000000000000 ffffffff808500d0 ffffffff8084f6d0 ffffffffffffffff (XEN) 0000000000000000 0000000000000000 0000000000000246 ffff88005ce1d938 (XEN) ffff88007f5bc108 0000000000000000 0000000000000000 ffffffff802063aa (XEN) 00000000deadbeef 00000000deadbeef 00000000deadbeef 0000010000000000 (XEN) ffffffff802063aa 000000000000e033 0000000000000246 ffffffff80781f30 (XEN) 000000000000e02b 000000000000beef 000000000000beef 000000000000beef (XEN) 000000000000beef 0000000000000000 ffff8300bfafc000 (XEN) Xen call trace: (XEN) [<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) [<ffff828c8015942c>] smp_call_function_interrupt+0x99/0xe8 (XEN) [<ffff828c80143470>] call_function_interrupt+0x30/0x40 (XEN) [<ffff828c801791df>] acpi_processor_idle+0x1fe/0x42f (XEN) [<ffff828c8013e7db>] idle_loop+0xbe/0xc5 (XEN) (XEN) *** Dumping CPU0 guest state: *** (XEN) No guest context (CPU is idle). (XEN) (XEN) *** Dumping CPU1 host state: *** (XEN) ----[ Xen-3.4.2 x86_64 debug=y Not tainted ]---- (XEN) CPU: 1 (XEN) RIP: e008:[<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) RFLAGS: 0000000000010092 CONTEXT: hypervisor (XEN) rax: ffff83043ff97bf8 rbx: 0000000000c881c7 rcx: 0000000000000001 (XEN) rdx: ffff828c8027e900 rsi: ffff83043ff97bf8 rdi: 0000000000000000 (XEN) rbp: ffff83043ffd7db8 rsp: ffff83043ffd7da8 r8: ffff828c8010e0e7 (XEN) r9: 0000000000000003 r10: ffff83040ef14a88 r11: 000052ba2e8e2eda (XEN) r12: 0000000000c843b5 r13: ffff83042e1d8660 r14: ffff83042e1d8600 (XEN) r15: ffff828c8021a760 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 000000022394c000 cr2: 00007f9695f32315 (XEN) ds: 002b es: 002b fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff83043ffd7da8: (XEN) 0000000000c8437d 0000000000c881c7 ffff83043ffd7dc8 ffff828c8015942c (XEN) 00007cfbc0028207 ffff828c80143470 ffff828c8021a760 ffff83042e1d8600 (XEN) ffff83042e1d8660 0000000000c843b5 ffff83043ffd7ed0 0000000000c881c7 (XEN) 000052ba2e8e2eda ffff83040ef14a88 0000000000000003 0000000000000004 (XEN) 0000000000c881c7 0000000000000001 0000000000001008 0000000000000001 (XEN) 0000000000000000 000000fb00000000 ffff828c801791df 000000000000e008 (XEN) 0000000000000297 ffff83043ffd7e80 000000000000e010 ffff828c8027e900 (XEN) ffff828c8027f900 ffff83043ffd7ed0 000000018011af48 ffffffffffffffff (XEN) ffff83043ffd7f28 ffff83043ffd7f28 ffff828c8027ad80 ffff828c8027e900 (XEN) ffff828c8021a760 ffff83043ffd7f20 ffff828c8013e7db ffff828c8011af79 (XEN) ffff83043ffd7f28 ffff828c8023c5b0 ffff8300bff40000 0000000000000001 (XEN) ffff8300beb60000 000052b9fb24146d ffff828c8023d100 ffff83043ffd7dc8 (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 (XEN) 0000000000000000 0000000000000001 0000000000000246 0000979700000000 (XEN) 0000000000000000 ffff8803e98c9ea0 0000000000000000 ffffffff802063aa (XEN) 00000000deadbeef 00000000deadbeef 00000000deadbeef 0000010000000000 (XEN) ffffffff802063aa 000000000000e033 0000000000000246 ffff8803e98c9ed8 (XEN) 000000000000e02b 000000000000beef 000000000000beef 000000000000beef (XEN) 000000000000beef 0000000000000001 ffff8300bff40000 (XEN) Xen call trace: (XEN) [<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) [<ffff828c8015942c>] smp_call_function_interrupt+0x99/0xe8 (XEN) [<ffff828c80143470>] call_function_interrupt+0x30/0x40 (XEN) [<ffff828c801791df>] acpi_processor_idle+0x1fe/0x42f (XEN) [<ffff828c8013e7db>] idle_loop+0xbe/0xc5 (XEN) (XEN) *** Dumping CPU1 guest state: *** (XEN) No guest context (CPU is idle). (XEN) (XEN) *** Dumping CPU2 host state: *** (XEN) ----[ Xen-3.4.2 x86_64 debug=y Not tainted ]---- (XEN) CPU: 2 (XEN) RIP: e008:[<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) RFLAGS: 0000000000010092 CONTEXT: hypervisor (XEN) rax: ffff83043ff97bf8 rbx: 0000000000efc5ce rcx: 0000000000000001 (XEN) rdx: ffff828c8027e900 rsi: ffff83043ff97bf8 rdi: 0000000000000000 (XEN) rbp: ffff83043ffc7db8 rsp: ffff83043ffc7da8 r8: ffff828c8010e0e7 (XEN) r9: 0000000000000004 r10: ffff83041a9bc718 r11: 000052ba2cce99f9 (XEN) r12: 0000000000efa19d r13: ffff83042e1d8ab0 r14: ffff83042e1d8a50 (XEN) r15: ffff828c8021a760 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 0000000080804000 cr2: 00000000119e3000 (XEN) ds: 002b es: 002b fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff83043ffc7da8: (XEN) 0000000000000282 0000000000efc5ce ffff83043ffc7dc8 ffff828c8015942c (XEN) 00007cfbc0038207 ffff828c80143470 ffff828c8021a760 ffff83042e1d8a50 (XEN) ffff83042e1d8ab0 0000000000efa19d ffff83043ffc7ed0 0000000000efc5ce (XEN) 000052ba2cce99f9 ffff83041a9bc718 0000000000000004 0000000000000004 (XEN) 0000000000efc5ce 0000000000000001 0000000000001008 0000000000000001 (XEN) 0000000000000000 000000fb00000000 ffff828c801791df 000000000000e008 (XEN) 0000000000000297 ffff83043ffc7e80 000000000000e010 ffffffffffffffff (XEN) ffff83043ffc7ed8 ffff828c8011d137 00000001bfafa000 ffffffffffffffff (XEN) ffff83043ffc7f28 ffff83043ffc7f28 ffff828c8027ad80 ffff828c8027e900 (XEN) ffff828c8021a760 ffff83043ffc7f20 ffff828c8013e7db ffff828c8011af79 (XEN) ffff83043ffc7f28 ffff828c8023c5b0 ffff8300bfafa000 0000000000000002 (XEN) ffff8300bfaf6000 000052ba2c40dc61 ffff828c8023e100 ffff83043ffc7dc8 (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 (XEN) 0000000000000000 0000000000000002 0000000000000246 ffff8803e99afcf0 (XEN) ffff8803e99ad988 0000000000000000 0000000000000000 ffffffff802063aa (XEN) 00000000deadbeef 00000000deadbeef 00000000deadbeef 0000010000000000 (XEN) ffffffff802063aa 000000000000e033 0000000000000246 ffff8803e98cbed8 (XEN) 000000000000e02b 000000000000beef 000000000000beef 000000000000beef (XEN) 000000000000beef 0000000000000002 ffff8300bfafa000 (XEN) Xen call trace: (XEN) [<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) [<ffff828c8015942c>] smp_call_function_interrupt+0x99/0xe8 (XEN) [<ffff828c80143470>] call_function_interrupt+0x30/0x40 (XEN) [<ffff828c801791df>] acpi_processor_idle+0x1fe/0x42f (XEN) [<ffff828c8013e7db>] idle_loop+0xbe/0xc5 (XEN) (XEN) *** Dumping CPU2 guest state: *** (XEN) No guest context (CPU is idle). (XEN) (XEN) *** Dumping CPU3 host state: *** (XEN) ----[ Xen-3.4.2 x86_64 debug=y Not tainted ]---- (XEN) CPU: 3 (XEN) RIP: e008:[<ffff828c8010e0f0>] __dump_execstate+0x9/0x78 (XEN) RFLAGS: 0000000000010092 CONTEXT: hypervisor (XEN) rax: ffff83043ff97bf8 rbx: 0000000000000003 rcx: 0000000000000001 (XEN) rdx: ffff828c8027e900 rsi: ffff83043ff97bf8 rdi: 0000000000000000 (XEN) rbp: ffff83043ffb7dd8 rsp: ffff83043ffb7dc8 r8: ffff828c8010e0e7 (XEN) r9: 0000000000000004 r10: ffff8300beb456d8 r11: 000052ba60111156 (XEN) r12: ffff83043ffb7f28 r13: ffff83043ffb7f28 r14: ffff828c8027e900 (XEN) r15: ffff828c8027f900 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 000000008b7db000 cr2: 000000000333cd38 (XEN) ds: 002b es: 002b fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff83043ffb7dc8: (XEN) ffff828c801075a7 0000000000000003 ffff83043ffb7de8 ffff828c8015942c (XEN) 00007cfbc00481e7 ffff828c80143470 ffff828c8027f900 ffff828c8027e900 (XEN) ffff83043ffb7f28 ffff83043ffb7f28 ffff83043ffb7ed0 0000000000000003 (XEN) 000052ba60111156 ffff8300beb456d8 0000000000000004 0000000000000002 (XEN) ffff828c8027ea80 0000000000000001 0000000000000001 ffff828c8023f5c0 (XEN) 0000000000003fff828c8011b157>] _spin_unlock_irqrestore+0xc/0x24 (XEN) RFLAGS: 0000000000010002 CONTEXT: hypervisor (XEN) rax: 0000000000000001 rbx: 0000000000000000 rcx: 0000000000000020 (XEN) rdx: 00000000000003f8 rsi: 0000000000000082 rdi: ffff828c80203b80 (XEN) rbp: ffff83043ff90b48 rsp: ffff83043ff90b48 r8: 0000000000000004 (XEN) r9: 0000000000000004 r10: 00000000fffffffc r11: 0000000000000001 (XEN) r12: ffff828c801ec9cb r13: ffff828c80203b00 r14: 0000000000000000 (XEN) r15: 0000000000000000 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 00000000bfc6c000 cr2: 00007f5cf492d8d0 (XEN) ds: 002b es: 002b fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff83043ff90b48: (XEN) ffff83043ff90b98 ffff828c801290c4 000000083ff90b88 ffff828c80203b80 (XEN) 0000000000000082 ffff828c801ec9c5 ffff83043ff90c70 0000000000000082 (XEN) ffff83043ff90f58 0000000000000001 ffff83043ff90ba8 ffff828c801276ea (XEN) ffff83043ff90bc8 ffff828c8012771f ffff83043ff90bd8 0000000000000000 (XEN) ffff83043ff90c58 ffff828c80127776 ffff83043ff90c28 ffff828c801290c4 (XEN) 000000083ff90c58 ffff828c80203b80 0000000000000082 ffff828c801f3523 (XEN) ffff83043ff90c70 0000000000000082 ffff83043ff90f58 0000000000000001 (XEN) ffff83043ff90c38 ffff828c801276ea ffff83043ff90c58 ffff828c80127728 (XEN) ffff83043ff90f58 0000000000000000 ffff83043ff90d68 ffff828c80127cae (XEN) 0000000000000079 ffff828c8027fe8a 0000003000000010 ffff83043ff90d78 (XEN) ffff83043ff90c98 0000000000000000 0000000000000000 0000000000000005 (XEN) 0000000000000000 0000000000000000 0000000000000004 0000000000000004 (XEN) ffff83043ff90ce8 0000000000000020 ffff828c801ec9cb 0000000000000086 (XEN) ffff83043ff90d38 ffff828c801290c4 ffff83043ff90d18 0000000000000004 (XEN) ffff83043ff90d28 ffff828c801e92a9 ffff83043ff90d68 ffff828c801d55e5 (XEN) 6e69617420746f4e 0000000000646574 ffff83043ff90d48 ffff828c801285bb (XEN) ffff83043ff90d78 ffff83043ff97f28 0000000000000001290c4 (XEN) 000000008005003b ffff828c80203b80 00007f5cf492d8d0 00000000bfc6c000 (XEN) 00000000000026f0 0000000000000082 ffff828c8010e0e7 0000000000000001 (XEN) Xen call trace: (XEN) [<ffff828c8011b157>] _spin_unlock_irqrestore+0xc/0x24 (XEN) [<ffff828c801290c4>] serial_puts+0xea/0xf9 (XEN) [<ffff828c801276ea>] sercon_puts+0x25/0x27 (XEN) [<ffff828c8012771f>] __putstr+0x33/0x75 (XEN) [<ffff828c80127776>] printk_start_of_line+0x15/0x81 (XEN) [<ffff828c80127cae>] printk+0x19c/0x1cf (XEN) [<ffff828c801d59ec>] show_registers+0x29e/0x374 (XEN) [<ffff828c8015f4d4>] show_execution_state+0x11/0x20 (XEN) [<ffff828c8015fdeb>] fatal_trap+0x5d/0xd6 (XEN) [<ffff828c80156d74>] nmi_watchdog_tick+0xc4/0x1b4 (XEN) [<ffff828c8015ffa9>] do_nmi+0x5d/0xf9 (XEN) [<ffff828c801d2943>] handle_ist_exception+0x58/0x65 (XEN) [<ffff828c801595e6>] on_selected_cpus+0x10a/0x12f (XEN) [<ffff828c8010e24a>] dump_registers+0xeb/0x135 (XEN) [<ffff828c8010e34b>] handle_keypress+0x76/0x9b (XEN) [<ffff828c80127d98>] __serial_rx+0x16/0x5a (XEN) [<ffff828c80127e65>] serial_rx+0x89/0x8e (XEN) [<ffff828c8012924e>] serial_rx_interrupt+0xa9/0xbf (XEN) [<ffff828c8012885c>] ns16550_interrupt+0x47/0x61 (XEN) [<ffff828c80148d99>] do_IRQ+0x3e7/0x42e (XEN) [<ffff828c801423b6>] common_interrupt+0x26/0x30 (XEN) [<ffff828c801791df>] acpi_processor_idle+0x1fe/0x42f (XEN) [<ffff828c8013e7db>] idle_loop+0xbe/0xc5 (XEN) (XEN) (XEN) **************************************** (XEN) Panic on CPU 5: (XEN) Assertion '((lock)->lock <= 0)' failed at /var/tmp/portage/app-emulation/xen-3.4.2/work/xen-:18 (XEN) **************************************** (XEN) (XEN) Reboot in five seconds... Andy _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel

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