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Miklos Szeredi 1025281622 ovl: fix encoding fid for lower only root

commit 004b8d1491b4bcbb7da1a3206d1e7e66822d47c6 upstream.

ovl_check_encode_origin() should return a positive number if the lower
dentry is to be encoded, zero otherwise.  If there's no upper layer at all
(read-only overlay), then it obviously needs to return positive.

This was broken by commit 16aac5ad1fa9 ("ovl: support encoding
non-decodable file handles"), which didn't take the lower-only
configuration into account.

Fix by checking the no-upper-layer case up-front.

Reported-and-tested-by: Youzhong Yang <youzhong@gmail.com>
Closes: https://lore.kernel.org/all/CADpNCvaBimi+zCYfRJHvCOhMih8OU0rmZkwLuh24MKKroRuT8Q@mail.gmail.com/
Fixes: 16aac5ad1fa9 ("ovl: support encoding non-decodable file handles")
Cc: <stable@vger.kernel.org> # v6.6
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-06-27 13:49:12 +02:00

copy_up.c

v6.6-rc4.vfs.fixes

2023-09-26 08:50:30 -07:00

dir.c

ovl: remove upper umask handling from ovl_create_upper()

2024-06-12 11:12:24 +02:00

export.c

ovl: fix encoding fid for lower only root

2024-06-27 13:49:12 +02:00

file.c

ovl: fix file reference leak when submitting aio