On Tue, Nov 14, 2017 at 07:39:11AM +0800, Qu Wenruo wrote: > > - extend mount options to specify zlib compression level, -o compress=zlib:9 > > However the support for it has a big problem, it will cause wild memory > access for "-o compress" mount option. > > Kernel ASAN can detect it easily and we already have user report about > it. Btrfs/026 could also easily trigger it. > > The fixing patch is submitted some days ago: > https://patchwork.kernel.org/patch/10042553/ > > And the default compression level when not specified is zero, which > means no compression but directly memory copy.
This fix will go in next pull request. Thanks.
