Serious issue with serial console in 5.4
kris at obsecurity.org
Thu Jul 21 05:00:53 GMT 2005
On Mon, Jul 18, 2005 at 11:58:54AM +0200, Eirik ?verby wrote:
> I reported this before, but I am very surprised that it is still the
> (This is from the last time it happened; this time the box rebooted
> and cleared the serial console before I had time to cut/paste it.
> >Fatal trap 12: page fault while in kernel mode
> >cpuid = 1; apic id = 00
> >fault virtual address = 0x1c
> >fault code = supervisor write, page not present
> >instruction pointer = 0x8:0xc0620b5f
> >stack pointer = 0x10:0xdadbd988
> >frame pointer = 0x10:0xdadbd994
> >code segment = base 0x0, limit 0xfffff, type 0x1b
> > = DPL 0, pres 1, def32 1, gran 1
> >processor eflags = interrupt enabled, resume, IOPL = 0
> >current process = 51999 (getty)
> >trap number = 12
> >panic: page fault
> >cpuid = 1
> >boot() called on cpu#0
> >Uptime: 66d11h24m50s
> The above panic will show up occasionally when logging out from a
> serial console (i.e. ctrl-D, logout, exit, whatever). This is
> EXTREMELY BAD, as it will crash an otherwise perfectly healthy box at
> random - and renders the serial console useless.
> Robert Watson confirmed this to be an issue on the 10th of April.
You might have to wait until 6.0-R since fixing it seems to require
infrastructure changes that cannot easily be backported to 5.x.
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