Randolph Chung wrote:
Helge Deller wrote:
Any user on existing parisc 32- and 64bit-kernels can easily crash
the kernel and as such enforce a DSO.
A simple testcase is available here:
http://gsyprf10.external.hp.com/~deller/crash.tgz
The problem is introduced by the fact, that the handle_interruption()
crash handler calls the show_regs() function, which in turn tries
to unwind the stack by calling parisc_show_stack().
Since the stack contains userspace addresses, a try to unwind the
stack is dangerous and useless and leads to the crash.
Helge,
I think this is ok, but can you preserve the printing of IAOQ/RP even
for user processes?
Thanks Randolph,
You are probably right. It's better to stay consistent for debugging and
you'll see the important registers at once.
I'll respin a new patch.
Helge
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