XPost: linux.debian.bugs.dist
From:
waldi@debian.org
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 <
lizhi.xu@windriver.com>
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:
syzbot+6af973a3b8dfd2faefdc@syzkaller.appspotmail.com
Closes:
https://syzkaller.appspot.com/bug?extid=6af973a3b8dfd2faefdc
Signed-off-by: Lizhi Xu <
lizhi.xu@windriver.com>
Reviewed-by: Christoph Hellwig <
hch@lst.de>
Link:
https://lore.kernel.org/r/20250428143626.3318717-1-lizhi.xu@windriver.com
Signed-off-by: Jens Axboe <
axboe@kernel.dk>
Signed-off-by: Sasha Levin <
sashal@kernel.org>
Bastian
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