Set mode 0600 on files in the cache so that cachefilesd can run as an unprivileged user rather than leaving the files all with 0. Directories are already set to 0700.
Userspace then needs to set the uid and gid before issuing the "bind" command and the cache must've been chown'd to those IDs. Signed-off-by: David Howells <[email protected]> cc: David Howells <[email protected]> cc: Jeff Layton <[email protected]> cc: [email protected] cc: [email protected] cc: [email protected] --- fs/cachefiles/namei.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index 82219a8f6084..66482c193e86 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -451,7 +451,8 @@ struct file *cachefiles_create_tmpfile(struct cachefiles_object *object) ret = cachefiles_inject_write_error(); if (ret == 0) { - file = vfs_tmpfile_open(&nop_mnt_idmap, &parentpath, S_IFREG, + file = vfs_tmpfile_open(&nop_mnt_idmap, &parentpath, + S_IFREG | 0600, O_RDWR | O_LARGEFILE | O_DIRECT, cache->cache_cred); ret = PTR_ERR_OR_ZERO(file); -- Linux-cachefs mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-cachefs
