On Wed, Dec 11, 2019 at 3:22 PM Thomas Munro <thomas.mu...@gmail.com> wrote: > 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.
Hehe, the dodgy looking magic numbers *were* wrong: - * The kernel signal delivery code writes up to about 1.5kB + * The kernel signal delivery code writes a bit over 4KB https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20200724092528.1578671-2-...@ellerman.id.au/
