On Sat, Dec 05, 2020 at 08:48:15PM +0100, Thomas Gleixner wrote: > Corentin, > > On Sat, Dec 05 2020 at 19:43, Corentin Labbe wrote: > > On Fri, Dec 04, 2020 at 09:58:21PM +0100, Thomas Gleixner wrote: > >> Can you please replace the debug patch with the one below and try again? > >> That stops the trace right on the condition. > > > > Hello, the result could be found at http://kernel.montjoie.ovh/130739.log > > Thanks for providing this. This is clearly showing where stuff goes > wrong. It starts here at 729.550001. I removed the uninteresting parts: > > 0d..2 147103293us : __kmap_local_page_prot <-sg_miter_next > 0d..3 147103308us :__kmap_local_pfn_prot: kmap_local_pfn: 1 ffefd000 > > 0d..3 147103311us : __kmap_local_page_prot <-sg_miter_next > 0d..4 147103325us : __kmap_local_pfn_prot: kmap_local_pfn: 3 ffefb000 > > 0d..3 147103429us : kunmap_local_indexed <-sg_miter_stop > 0d..4 147103433us : kunmap_local_indexed: kunmap_local: 3 ffefd000 > > So this maps two pages and unmaps the first one. That's all called from > sun4i_ss_opti_poll() and the bug is clearly visible there: > > sg_miter_next(&mi); > sg_miter_next(&mo); > > release_ss: > sg_miter_stop(&mi); > sg_miter_stop(&mo); > > Written by yourself :) Same issue in sun4i_ss_cipher_poll() > > Fix below. > Unfortunatly, the crash still happen with the fix. See http://kernel.montjoie.ovh/131321.log
