io_uring: reference ->nsproxy for file table commands

If we don't get and assign the namespace for the async work, then certain
paths just don't work properly (like /dev/stdin, /proc/mounts, etc).
Anything that references the current namespace of the given task should
be assigned for async work on behalf of that task.

Cc: stable@vger.kernel.org # v5.5+
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/io-wq.h b/fs/io-wq.h
index ddaf9614cf9b..2519830c8c55 100644
--- a/fs/io-wq.h
+++ b/fs/io-wq.h
@@ -88,6 +88,7 @@ struct io_wq_work {
 	struct files_struct *files;
 	struct mm_struct *mm;
 	const struct cred *creds;
+	struct nsproxy *nsproxy;
 	struct fs_struct *fs;
 	unsigned long fsize;
 	unsigned flags;