From: Richard Weinberger Date: Wed, 17 Jan 2018 18:12:42 +0000 (+0100) Subject: ubifs: Check ubifs_wbuf_sync() return code X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=aac17948a7ce01fb60b9ee6cf902967a47b3ce26;p=linux.git ubifs: Check ubifs_wbuf_sync() return code 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: Fixes: 1e51764a3c2a ("UBIFS: add new flash file system") Signed-off-by: Richard Weinberger --- diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index b16ef162344ab..6c397a389105a 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1737,8 +1737,11 @@ 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); @@ -1804,8 +1807,11 @@ 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