On Mon, May 19, 2025 at 12:15:10PM +0200, Roland Clobus wrote: > It appears that the loopback device cannot be used any more with the mount > /run/live/medium (which is on /dev/sr0).
/run/live/medium is isofs? I would expect this commit: commit 184b147b9f7f07577567a80fcc9314f2bd0b0b00 Author: Lizhi Xu <[email protected]> Date: Mon Apr 28 22:36:26 2025 +0800 loop: Add sanity check for read/write_iter [ Upstream commit f5c84eff634ba003326aa034c414e2a9dcb7c6a7 ] Some file systems do not support read_iter/write_iter, such as selinuxfs in this issue. So before calling them, first confirm that the interface is supported and then call it. It is releavant in that vfs_iter_read/write have the check, and removal of their used caused szybot to be able to hit this issue. Fixes: f2fed441c69b ("loop: stop using vfs_iter__{read,write} for buffered I/O") Reported-by: [email protected] Closes: https://syzkaller.appspot.com/bug?extid=6af973a3b8dfd2faefdc Signed-off-by: Lizhi Xu <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jens Axboe <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Bastian -- Earth -- mother of the most beautiful women in the universe. -- Apollo, "Who Mourns for Adonais?" stardate 3468.1
