On 2019/12/1 16:40, Gao Xiang wrote: > From: Gao Xiang <gaoxiang25@xxxxxxxxxx> > > As David reported [1], ENODATA returns when attempting > to modify files by using EROFS as a overlayfs lower layer. > > The root cause is that listxattr could return unexpected > -ENODATA by mistake for inodes without xattr. That breaks > listxattr return value convention and it can cause copy > up failure when used with overlayfs. > > Resolve by zeroing out if no xattr is found for listxattr. > > [1] https://lore.kernel.org/r/CAEvUa7nxnby+rxK-KRMA46=exeOMApkDMAV08AjMkkPnTPV4CQ@xxxxxxxxxxxxxx > Fixes: cadf1ccf1b00 ("staging: erofs: add error handling for xattr submodule") > Cc: <stable@xxxxxxxxxxxxxxx> # 4.19+ > Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx> Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx> Thanks,
