Kernel Memory Fault Crash Analysis
I believe I am getting a fault caused by the _XentMM kernel routine.
This fault seems similar to one in 05/1998 answered by Tom Blinn but I have
a slightly different set of processes running .Whereas the previous fault
had a wsselect routine running pointing to an input device error , I have a
getf routine.
Does anyone know what type of code this particular routine relates to , so
that I can try and track down a cause ?
trap: invalid memory read access from kernel mode
faulting virtual address: 0x0100000000000000
pc of faulting instruction: 0xfffffc000044131c
ra contents at time of fault: 0xfffffc000024f47c
sp contents at time of fault: 0xffffffff905c7560
panic (cpu 0): kernel memory fault
1 panic(s = 0xfffffc0000652150 = "kernel memory fault")
["../../../../src/kernel/bsd/subr_prf.c":757, 0xfffffc0000456cb4]
2 trap() ["../../../../src/kernel/arch/alpha/trap.c":1243,
0xfffffc0000508724]
3 _XentMM(0x0, 0xfffffc000044131c, 0xfffffc000068fa20,
0xfffffc000d8af180, 0x0) ["../../../../src/kernel/arch/alpha/locore.s":1307,
0xfffffc00004f6d54]
4 getf(0xffffffff905c7738, 0xfffffc000728da80, 0x0, 0xfffffc0004ba5980,
0xfffffc0000a88be0) ["../../../../src/kernel/bsd/kern_descrip.c":1326,
0xfffffc0000441318]
5 ioctl_base(0xfffffc000603c210, 0xffffffff905c78c8, 0xffffffff905c78b8,
0x0, 0xfffffc0000507a98) ["../../../../src/kernel/bsd/sys_generic.c":373,
0xfffffc000024f478]
6 ioctl(0xffffffff905c78b8, 0x0, 0xfffffc0000507a98, 0xfffffc000050811c,
0xfffffc0000507508) ["../../../../src/kernel/bsd/sys_generic.c":344,
0xfffffc000024f41c]
7 syscall(0x3ffc0099170, 0x1, 0x0, 0x0, 0x36)
["../../../../src/kernel/arch/alpha/syscall_trap.c":519, 0xfffffc0000507504]
8 _Xsyscall(0x8, 0x3ff800db5d8, 0x3ffc0091560, 0x0, 0x40067408)
["../../../../src/kernel/arch/alpha/locore.s":1094, 0xfffffc00004f6b44]
End Trace for machine_slot[paniccpu].cpu_panic_thread:
Invalid character in input
_uptime: .35 hours
This crash has started happening regulary and its always the same faulting
instrcuction ( 0xfffffc000044131c ) ,The machine is a 2100A 4/275 running
3.2 G
OSFBIN350 & 375 and OSFBINCOM350 & 375 kernel patches are loaded , Am I
missing any other obvious patch to fix this fault ?
A full crash file is :
<<Kernel Fault Crash>>
Regards,
JASON.BUTTERWORTH_at_PERSEUS.CO.UK
Received on Fri Dec 04 1998 - 12:58:51 NZDT