I got a hard failure on AWS m1.small, while running the seccomp tests:
* Starting xinetd daemon [74G[ OK ] [ 3726.335940] general protection fault: 0000 [#1] SMP [ 3726.335961] Modules linked in: iptable_filter ip_tables x_tables acpiphp [last unloaded: signpost] [ 3726.335976] [ 3726.335981] Pid: 24386, comm: seccomp_tests Not tainted 3.0.0-23-virtual #39-Ubuntu [ 3726.335992] EIP: 0061:[<c010372d>] EFLAGS: 00010202 CPU: 0 [ 3726.336004] EIP is at xen_write_cr4+0xd/0x20 [ 3726.336010] EAX: 00000664 EBX: 00000016 ECX: c08b4740 EDX: 00000000 [ 3726.336010] ESI: eb011980 EDI: b76e4bb0 EBP: eb00ff60 ESP: eb00ff60 [ 3726.336010] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069 [ 3726.336010] Process seccomp_tests (pid: 24386, ti=eb00e000 task=eb011980 task.ti=eb00e000) [ 3726.336010] Stack: [ 3726.336010] eb00ff68 c0110bc6 eb00ff70 c01116f5 eb00ff7c c01b6868 00000001 eb00ffac [ 3726.336010] c01676cc b76e4bb0 00000000 c10a0680 000003e8 eb00ffac c016646a 4a13f267 [ 3726.336010] 00000016 b76e4bb0 00000000 eb00e000 c065f644 00000016 00000001 0804bd41 [ 3726.336010] Call Trace: [ 3726.336010] [<c0110bc6>] hard_disable_TSC+0x16/0x20 [ 3726.336010] [<c01116f5>] disable_TSC+0x25/0x30 [ 3726.336010] [<c01b6868>] prctl_set_seccomp+0x38/0x60 [ 3726.336010] [<c01676cc>] sys_prctl+0xbc/0x300 [ 3726.336010] [<c016646a>] ? sys_setresuid+0x10a/0x150 [ 3726.336010] [<c065f644>] syscall_call+0x7/0xb [ 3726.336010] Code: e5 3e 8d 74 26 00 5d c3 8d b6 00 00 00 00 55 89 e5 3e 8d 74 26 00 31 c0 5d c3 8d 74 26 00 55 89 e5 3e 8d 74 26 00 25 6f ff fb ff <0f> 22 e0 5d c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 [ 3726.336010] EIP: [<c010372d>] xen_write_cr4+0xd/0x20 SS:ESP 0069:eb00ff60 [ 3726.336259] ---[ end trace d66d75245de68efa ]--- [ 3726.337986] general protection fault: 0000 [#2] SMP [ 3726.337997] Modules linked in: iptable_filter ip_tables x_tables acpiphp [last unloaded: signpost] [ 3726.338011] [ 3726.338016] Pid: 494, comm: rs:main Q:Reg Tainted: G D 3.0.0-23-virtual #39-Ubuntu [ 3726.338027] EIP: 0061:[<c010372d>] EFLAGS: 00010002 CPU: 0 [ 3726.338033] EIP is at xen_write_cr4+0xd/0x20 [ 3726.338039] EAX: 00000664 EBX: eb011980 ECX: 00000000 EDX: 00000001 [ 3726.338045] ESI: eb016600 EDI: c1388000 EBP: eb00fd74 ESP: eb00fd74 [ 3726.338052] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069 [ 3726.338058] Process rs:main Q:Reg (pid: 494, ti=eb00e000 task=eb016600 task.ti=c1388000) [ 3726.338065] Stack: [ 3726.338069] eb00fd7c c0110bc6 eb00fd9c c011182f eb00fd9c ec693a00 00000000 eb011980 [ 3726.338084] eb016600 00000000 eb00fdc4 c0109145 0119b000 00000000 eb011c84 00000000 [ 3726.338098] ec693a00 4a13f267 eb08da00 00000000 c1389e5c c065d237 eb00fe54 00000286 [ 3726.338113] Call Trace: [ 3726.338119] [<c0110bc6>] hard_disable_TSC+0x16/0x20 [ 3726.338126] [<c011182f>] __switch_to_xtra+0x8f/0x130 [ 3726.338134] [<c0109145>] __switch_to+0x1d5/0x1f0 [ 3726.338141] [<c065d237>] __schedule+0x2d7/0x620 [ 3726.338149] [<c0106fae>] ? __raw_callee_save_xen_restore_fl+0x6/0x8 [ 3726.338158] [<c0151161>] ? vprintk+0x151/0x430 [ 3726.338165] [<c065f45d>] ? _raw_spin_lock_irqsave+0x2d/0x40 [ 3726.338173] [<c014a21b>] ? __cond_resched+0x1b/0x30 [ 3726.338180] [<c065d5f9>] ? _cond_resched+0x29/0x30 [ 3726.338187] [<c065e770>] ? down_read+0x10/0x1f [ 3726.338194] [<c0194684>] ? acct_collect+0x44/0x180 [ 3726.338202] [<c0154bf9>] ? do_exit+0x2b9/0x3a0 [ 3726.338209] [<c064b7e0>] ? printk+0x2d/0x2f [ 3726.338217] [<c0660886>] ? oops_end+0x96/0xd0 [ 3726.338224] [<c010caa4>] ? die+0x54/0x80 [ 3726.338231] [<c0660306>] ? do_general_protection+0xa6/0x220 [ 3726.338239] [<c0106fae>] ? __raw_callee_save_xen_restore_fl+0x6/0x8 [ 3726.338247] [<c0660260>] ? default_do_nmi+0x290/0x290 [ 3726.338254] [<c065fd2f>] ? error_code+0x67/0x6c [ 3726.338261] [<c010372d>] ? xen_write_cr4+0xd/0x20 [ 3726.338268] [<c0110bc6>] ? hard_disable_TSC+0x16/0x20 [ 3726.338275] [<c01116f5>] ? disable_TSC+0x25/0x30 [ 3726.338282] [<c01b6868>] ? prctl_set_seccomp+0x38/0x60 [ 3726.338289] [<c01676cc>] ? sys_prctl+0xbc/0x300 [ 3726.338296] [<c016646a>] ? sys_setresuid+0x10a/0x150 [ 3726.338303] [<c065f644>] ? syscall_call+0x7/0xb [ 3726.338309] Code: e5 3e 8d 74 26 00 5d c3 8d b6 00 00 00 00 55 89 e5 3e 8d 74 26 00 31 c0 5d c3 8d 74 26 00 55 89 e5 3e 8d 74 26 00 25 6f ff fb ff <0f> 22 e0 5d c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 [ 3726.338383] EIP: [<c010372d>] xen_write_cr4+0xd/0x20 SS:ESP 0069:eb00fd74 [ 3726.338394] ---[ end trace d66d75245de68efb ]---
I got a hard failure on AWS m1.small, while running the seccomp tests:
* Starting xinetd daemon cr4+0xd/ 0x20 TSC+0x16/ 0x20 TSC+0x25/ 0x30 seccomp+ 0x38/0x60 0xbc/0x300 0x10a/0x150 call+0x7/ 0xb cr4+0xd/ 0x20 SS:ESP 0069:eb00ff60 cr4+0xd/ 0x20 TSC+0x16/ 0x20 to_xtra+ 0x8f/0x130 to+0x1d5/ 0x1f0 0x2d7/0x620 save_xen_ restore_ fl+0x6/ 0x8 lock_irqsave+ 0x2d/0x40 resched+ 0x1b/0x30 0x29/0x30 0x44/0x180 protection+ 0xa6/0x220 save_xen_ restore_ fl+0x6/ 0x8 do_nmi+ 0x290/0x290 0x67/0x6c cr4+0xd/ 0x20 TSC+0x16/ 0x20 TSC+0x25/ 0x30 seccomp+ 0x38/0x60 0xbc/0x300 0x10a/0x150 call+0x7/ 0xb cr4+0xd/ 0x20 SS:ESP 0069:eb00fd74
[74G[ OK ]
[ 3726.335940] general protection fault: 0000 [#1] SMP
[ 3726.335961] Modules linked in: iptable_filter ip_tables x_tables acpiphp [last unloaded: signpost]
[ 3726.335976]
[ 3726.335981] Pid: 24386, comm: seccomp_tests Not tainted 3.0.0-23-virtual #39-Ubuntu
[ 3726.335992] EIP: 0061:[<c010372d>] EFLAGS: 00010202 CPU: 0
[ 3726.336004] EIP is at xen_write_
[ 3726.336010] EAX: 00000664 EBX: 00000016 ECX: c08b4740 EDX: 00000000
[ 3726.336010] ESI: eb011980 EDI: b76e4bb0 EBP: eb00ff60 ESP: eb00ff60
[ 3726.336010] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[ 3726.336010] Process seccomp_tests (pid: 24386, ti=eb00e000 task=eb011980 task.ti=eb00e000)
[ 3726.336010] Stack:
[ 3726.336010] eb00ff68 c0110bc6 eb00ff70 c01116f5 eb00ff7c c01b6868 00000001 eb00ffac
[ 3726.336010] c01676cc b76e4bb0 00000000 c10a0680 000003e8 eb00ffac c016646a 4a13f267
[ 3726.336010] 00000016 b76e4bb0 00000000 eb00e000 c065f644 00000016 00000001 0804bd41
[ 3726.336010] Call Trace:
[ 3726.336010] [<c0110bc6>] hard_disable_
[ 3726.336010] [<c01116f5>] disable_
[ 3726.336010] [<c01b6868>] prctl_set_
[ 3726.336010] [<c01676cc>] sys_prctl+
[ 3726.336010] [<c016646a>] ? sys_setresuid+
[ 3726.336010] [<c065f644>] syscall_
[ 3726.336010] Code: e5 3e 8d 74 26 00 5d c3 8d b6 00 00 00 00 55 89 e5 3e 8d 74 26 00 31 c0 5d c3 8d 74 26 00 55 89 e5 3e 8d 74 26 00 25 6f ff fb ff <0f> 22 e0 5d c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89
[ 3726.336010] EIP: [<c010372d>] xen_write_
[ 3726.336259] ---[ end trace d66d75245de68efa ]---
[ 3726.337986] general protection fault: 0000 [#2] SMP
[ 3726.337997] Modules linked in: iptable_filter ip_tables x_tables acpiphp [last unloaded: signpost]
[ 3726.338011]
[ 3726.338016] Pid: 494, comm: rs:main Q:Reg Tainted: G D 3.0.0-23-virtual #39-Ubuntu
[ 3726.338027] EIP: 0061:[<c010372d>] EFLAGS: 00010002 CPU: 0
[ 3726.338033] EIP is at xen_write_
[ 3726.338039] EAX: 00000664 EBX: eb011980 ECX: 00000000 EDX: 00000001
[ 3726.338045] ESI: eb016600 EDI: c1388000 EBP: eb00fd74 ESP: eb00fd74
[ 3726.338052] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[ 3726.338058] Process rs:main Q:Reg (pid: 494, ti=eb00e000 task=eb016600 task.ti=c1388000)
[ 3726.338065] Stack:
[ 3726.338069] eb00fd7c c0110bc6 eb00fd9c c011182f eb00fd9c ec693a00 00000000 eb011980
[ 3726.338084] eb016600 00000000 eb00fdc4 c0109145 0119b000 00000000 eb011c84 00000000
[ 3726.338098] ec693a00 4a13f267 eb08da00 00000000 c1389e5c c065d237 eb00fe54 00000286
[ 3726.338113] Call Trace:
[ 3726.338119] [<c0110bc6>] hard_disable_
[ 3726.338126] [<c011182f>] __switch_
[ 3726.338134] [<c0109145>] __switch_
[ 3726.338141] [<c065d237>] __schedule+
[ 3726.338149] [<c0106fae>] ? __raw_callee_
[ 3726.338158] [<c0151161>] ? vprintk+0x151/0x430
[ 3726.338165] [<c065f45d>] ? _raw_spin_
[ 3726.338173] [<c014a21b>] ? __cond_
[ 3726.338180] [<c065d5f9>] ? _cond_resched+
[ 3726.338187] [<c065e770>] ? down_read+0x10/0x1f
[ 3726.338194] [<c0194684>] ? acct_collect+
[ 3726.338202] [<c0154bf9>] ? do_exit+0x2b9/0x3a0
[ 3726.338209] [<c064b7e0>] ? printk+0x2d/0x2f
[ 3726.338217] [<c0660886>] ? oops_end+0x96/0xd0
[ 3726.338224] [<c010caa4>] ? die+0x54/0x80
[ 3726.338231] [<c0660306>] ? do_general_
[ 3726.338239] [<c0106fae>] ? __raw_callee_
[ 3726.338247] [<c0660260>] ? default_
[ 3726.338254] [<c065fd2f>] ? error_code+
[ 3726.338261] [<c010372d>] ? xen_write_
[ 3726.338268] [<c0110bc6>] ? hard_disable_
[ 3726.338275] [<c01116f5>] ? disable_
[ 3726.338282] [<c01b6868>] ? prctl_set_
[ 3726.338289] [<c01676cc>] ? sys_prctl+
[ 3726.338296] [<c016646a>] ? sys_setresuid+
[ 3726.338303] [<c065f644>] ? syscall_
[ 3726.338309] Code: e5 3e 8d 74 26 00 5d c3 8d b6 00 00 00 00 55 89 e5 3e 8d 74 26 00 31 c0 5d c3 8d 74 26 00 55 89 e5 3e 8d 74 26 00 25 6f ff fb ff <0f> 22 e0 5d c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89
[ 3726.338383] EIP: [<c010372d>] xen_write_
[ 3726.338394] ---[ end trace d66d75245de68efb ]---