On Wed, Oct 23, 2019 at 08:05:49PM +0200, Thomas Gleixner wrote:
> Cyrill reported the following crash:
>
> BUG: unable to handle page fault for address: 1ff0
> #PF: supervisor read access in kernel mode
> RIP: 0010:get_stack_info+0xb3/0x148
>
> It turns out that if the stack
On Wed, Oct 23, 2019 at 11:31:40AM -0700, Matthew Wilcox wrote:
> On Wed, Oct 23, 2019 at 08:05:49PM +0200, Thomas Gleixner wrote:
> > Prevent this by checking the validity of the cea_exception_stack base
> > address and bailing out if it is zero.
>
> Could also initialise cea_exception_stack to
On Wed, Oct 23, 2019 at 08:05:49PM +0200, Thomas Gleixner wrote:
> Prevent this by checking the validity of the cea_exception_stack base
> address and bailing out if it is zero.
Could also initialise cea_exception_stack to -1? That would lead to it
being caught by ...
> end = begin +
Cyrill reported the following crash:
BUG: unable to handle page fault for address: 1ff0
#PF: supervisor read access in kernel mode
RIP: 0010:get_stack_info+0xb3/0x148
It turns out that if the stack tracer is invoked before the exception stack
mappings are initialized
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