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Message-Id: <20180422135104.464853640@linuxfoundation.org> Date: Sun, 22 Apr 2018 15:50:24 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Richard Weinberger <richard@....at> Subject: [PATCH 4.16 004/196] ubifs: Check ubifs_wbuf_sync() return code 4.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Richard Weinberger <richard@....at> commit aac17948a7ce01fb60b9ee6cf902967a47b3ce26 upstream. 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@...r.kernel.org> Fixes: 1e51764a3c2a ("UBIFS: add new flash file system") Signed-off-by: Richard Weinberger <richard@....at> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- fs/ubifs/super.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1737,8 +1737,11 @@ static void ubifs_remount_ro(struct ubif 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 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
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