If ubifs_wbuf_sync() fails we must not write a master node with the dirty marker cleared. Otherwise it is possible that in case of an IO error while syncing we mark the filesystem as clean and UBIFS refuses to recover upon next mount.

Cc: stable@vger.kernel.org Fixes: 1e51764a3c2a ("UBIFS: add new flash file system") Signed-off-by: Richard Weinberger richard@nod.at --- fs/ubifs/super.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 0beb285b143d..468bca452d0a 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1739,8 +1739,11 @@ static void ubifs_remount_ro(struct ubifs_info *c)

dbg_save_space_info(c);

- for (i = 0; i < c->jhead_cnt; i++) - ubifs_wbuf_sync(&c->jheads[i].wbuf); + for (i = 0; i < c->jhead_cnt; i++) { + err = ubifs_wbuf_sync(&c->jheads[i].wbuf); + if (err) + ubifs_ro_mode(c, err); + }

c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY); c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS); @@ -1806,8 +1809,11 @@ static void ubifs_put_super(struct super_block *sb) int err;

/* Synchronize write-buffers */ - for (i = 0; i < c->jhead_cnt; i++) - ubifs_wbuf_sync(&c->jheads[i].wbuf); + for (i = 0; i < c->jhead_cnt; i++) { + err = ubifs_wbuf_sync(&c->jheads[i].wbuf); + if (err) + ubifs_ro_mode(c, err); + }

/* * We are being cleanly unmounted which means the