4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Amir Goldstein <amir73il@xxxxxxxxx>
commit b02a16e6413a2f782e542ef60bad9ff6bf212f8a upstream.
This fixes a regression with readdir of impure dir in overlayfs
that is shared to VM via 9p fs.
Reported-by: Miguel Bernal Marin <miguel.bernal.marin@xxxxxxxxxxxxxxx>
Fixes: 4edb83bb1041 ("ovl: constant d_ino for non-merge dirs")
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Tested-by: Miguel Bernal Marin <miguel.bernal.marin@xxxxxxxxxxxxxxx>
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/overlayfs/readdir.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -645,7 +645,10 @@ static int ovl_iterate_real(struct file
return PTR_ERR(rdt.cache);
}
- return iterate_dir(od->realfile, &rdt.ctx);
+ err = iterate_dir(od->realfile, &rdt.ctx);
+ ctx->pos = rdt.ctx.pos;
+
+ return err;
}