Matthew Wilcox <willy@xxxxxxxxxxxxx> 于2021年10月7日周四 下午10:20写道： > > On Thu, Oct 07, 2021 at 02:40:29PM +0800, Hao Sun wrote: > > Hello, > > > > This crash can still be triggered repeatedly on the latest kernel. > > I asked you three days ago to try a patch and report the results: > > https://lore.kernel.org/linux-mm/YVtWhVNFhLbA9+Tl@xxxxxxxxxxxxxxxxxxxx/ Sorry, I missed that. Here are the results. Used reproducer: https://paste.ubuntu.com/p/yrYsn4zpcn/ Kernel log *before* applying the patch: https://paste.ubuntu.com/p/WtkFKB6Vy9/ Kernel log *after* applying the patch: https://paste.ubuntu.com/p/S2VrtDdggp/ Symbolized log: https://paste.ubuntu.com/p/RwXjCXDxB8/ In summary, the reproducer can crash the kernel with the same backtrace before applying the patch. After applying the patch, the reproducer program took about 3 minutes to crash the kernel and the backtrace seems different (RIP points to create_empty_buffers now). All the above tests were done on commit 60a9483534ed (Merge tag 'warning-fixes-20211005'). Regards Hao
