From: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx> commit 723ac751208f6d6540191689cfbf6c77135a7a1b upstream. If creation or finalization of a checkpoint fails due to anomalies in the checkpoint metadata on disk, a kernel warning is generated. This patch replaces the WARN_ONs by nilfs_error, so that a kernel, booted with panic_on_warn, does not panic. A nilfs_error is appropriate here to handle the abnormal filesystem condition. This also replaces the detected error codes with an I/O error so that neither of the internal error codes is returned to callers. Link: https://lkml.kernel.org/r/20220929123330.19658-1-konishi.ryusuke@xxxxxxxxx Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx> Reported-by: syzbot+fbb3e0b24e8dae5a16ee@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/nilfs2/segment.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -875,9 +875,11 @@ static int nilfs_segctor_create_checkpoi nilfs_mdt_mark_dirty(nilfs->ns_cpfile); nilfs_cpfile_put_checkpoint( nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); - } else - WARN_ON(err == -EINVAL || err == -ENOENT); - + } else if (err == -EINVAL || err == -ENOENT) { + nilfs_error(sci->sc_super, + "checkpoint creation failed due to metadata corruption."); + err = -EIO; + } return err; } @@ -891,7 +893,11 @@ static int nilfs_segctor_fill_in_checkpo err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 0, &raw_cp, &bh_cp); if (unlikely(err)) { - WARN_ON(err == -EINVAL || err == -ENOENT); + if (err == -EINVAL || err == -ENOENT) { + nilfs_error(sci->sc_super, + "checkpoint finalization failed due to metadata corruption."); + err = -EIO; + } goto failed_ibh; } raw_cp->cp_snapshot_list.ssl_next = 0;
