On Tue, Oct 15, 2019 at 4:50 AM Tom Lane <t...@sss.pgh.pa.us> wrote: > > Filed at > > https://bugzilla.kernel.org/show_bug.cgi?id=205183
For the curious-and-not-subscribed, there's now a kernel patch proposed for this. We guessed pretty close, but the problem wasn't those dodgy looking magic numbers, it was that the bad stack expansion check only allows for user space to expand the stack (FAULT_FLAG_USER), and here the kernel itself wants to build a stack frame.
