ocfs2: fix hung task in orphan recovery

A crafted OCFS2 image with corrupted orphan-directory extent metadata can
make umount hang.

During unmount, ocfs2_recovery_disable() waits for the
ocfs2_complete_recovery work item to finish.  The worker scans the orphan
directory through ocfs2_queue_orphans() and ocfs2_dir_foreach().  If
ocfs2_read_dir_block() fails on a corrupted directory block,
ocfs2_dir_foreach_blk_el() skips the block and continues walking.  On a
badly corrupted directory this can keep orphan recovery busy for a long
time, leaving umount blocked while flushing osb->ocfs2_wq.

Return the read error immediately for full directory scans and propagate
the error from ocfs2_dir_foreach().  When ocfs2_empty_dir() receives such
an error, report the directory as non-empty so unlink/rmdir does not
proceed on an unreadable directory.

Link: https://lore.kernel.org/20260702090507.446517-1-r772577952@gmail.com
Closes: https://lore.kernel.org/lkml/CANypQFbWH76Y6LWHEwAvTP7aQL04uMJ=dDyL6YDmxa3fv3Tyjg@mail.gmail.com/
Assisted-by: Codex:gpt-5.5-xhigh
Signed-off-by: Jiaming Zhang <r772577952@gmail.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Heming Zhao <heming.zhao@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions