[Xen-users] Strange Segmentation Faults

[Frank Isemann <f.isemann@xxxxxxxxxxx>]

hello there,

i've got strange segmentation faults on some programms, but only on
socket connections.

The first time i saw it on a UnrealIRCD Process, it "Segmentation
Faults" when i have tried to link the server with a another one.
(Connecting as "User" to the Server without Problems)

Now i have the same problems with a psybnc process. (Only if a user
wants to connect them)

The Guest OS is Debian Sarge ( amd64 ) .. details below


strace log from psybnc:
----
accept(3, {sa_family=AF_INET, sin_port=htons(63442),
sin_addr=inet_addr("85.16.47.195")}, [15201619075802333200]) = 8
rt_sigaction(SIGALRM, {0x41a1c0, [ALRM], SA_RESTART|0x4000000},
{SIG_IGN}, 8) = 0
alarm(10)                               = 0
socket(PF_FILE, SOCK_STREAM, 0)         = 9
connect(9, {sa_family=AF_FILE, path="/var/run/.nscd_socket"}, 110) = -1
ENOENT (No such file or directory)
close(9)                                = 0
open("/etc/hosts", O_RDONLY)            = -1 ENOENT (No such file or
directory)
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 9
connect(9, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("193.24.208.126")}, 28) = 0
sendto(9, "\3211\1\0\0\1\0\0\0\0\0\0\003195\00247\00216\00285\7in"...,
43, 0, NULL, 0) = 43
gettimeofday({1153005265, 443825}, NULL) = 0
poll([{fd=9, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
ioctl(9, FIONREAD, [263])               = 0
recvfrom(9, "\3211\201\200\0\1\0\1\0\4\0\4\003195\00247\00216\00285"...,
1024, 0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("193.24.208.126")}, [16]) = 263
close(9)                                = 0
rt_sigaction(SIGALRM, {SIG_IGN}, {0x41a1c0, [ALRM],
SA_RESTART|0x4000000}, 8) = 0
alarm(0)                                = 10
rt_sigaction(SIGALRM, {SIG_IGN}, {SIG_IGN}, 8) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
Process 2068 detached
-----


cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 47
model name      : AMD Athlon(tm) 64 Processor 3000+
stepping        : 0
cpu MHz         : 1808.330
cache size      : 512 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mca cmov pat pse36
clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow
pni lahf_lm
bogomips        : 3617.25
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc



lspci
0000:00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
0000:00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2)
0000:00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)
0000:00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)
0000:00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)
0000:00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
0000:00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)
0000:00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)
0000:00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
0000:00:04.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
0000:00:05.0 VGA compatible controller: nVidia Corporation C51PV
[GeForce 6150] (rev a2)
0000:00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
0000:00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a2)
0000:00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a2)
0000:00:0a.2 RAM memory: nVidia Corporation MCP51 Memory Controller 0
(rev a2)
0000:00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller
(rev a2)
0000:00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller
(rev a2)
0000:00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1)
0000:00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA
Controller (rev a1)
0000:00:0f.0 IDE interface: nVidia Corporation MCP51 Serial ATA
Controller (rev a1)
0000:00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
0000:00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a1)
0000:00:18.0 Host bridge: Advanced Micro Devices [AMD] K8
[Athlon64/Opteron] HyperTransport Technology Configuration
0000:00:18.1 Host bridge: Advanced Micro Devices [AMD] K8
[Athlon64/Opteron] Address Map
0000:00:18.2 Host bridge: Advanced Micro Devices [AMD] K8
[Athlon64/Opteron] DRAM Controller
0000:00:18.3 Host bridge: Advanced Micro Devices [AMD] K8
[Athlon64/Opteron] Miscellaneous Control
0000:03:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8169 Gigabit Ethernet (rev 10)


cat /etc/xen/vs100001-1.sxp

kernel = "/boot/vmlinuz-2.6.16-xenU"
#initrd = "/boot/initrd"
builder='linux'

memory = 128
name = "vs100001-1"
hostname = "vs100001-1.****"
vcpus = 1
disk =
['phy:/dev/vserver/vs100001-1--sda1,sda1,w','phy:/dev/vserver/vs100001-1--sda2,sda2,w']
root = "/dev/sda1 ro"
extra = "2"
#nics=1

# Vergabe der Mac Adresse, falls nicht gesetzt wird sie automatisch erzeugt.
#vif = [ 'mac=aa:00:00:00:00:11, bridge=xenbr0' ]
vif = [ '' ]

# DHCP?
dhcp="off"

# IP
ip="*****.3.100"

# Netzmaske
netmask="255.255.255.0"

# Gateway
gateway="****.3.1"
#----------------------------------------------------------------------------#








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