Enable the setfl() helper to handle idmapped mounts by passing down the mount's user namespace. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210112220124.837960-27-christian.brauner@xxxxxxxxxx Cc: Christoph Hellwig <hch@xxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: linux-fsdevel@xxxxxxxxxxxxxxx Reviewed-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx> --- /* v2 */ patch introduced /* v3 */ unchanged /* v4 */ unchanged /* v5 */ unchanged base-commit: 7c53f6b671f4aba70ff15e1b05148b10d58c2837 /* v6 */ base-commit: 19c329f6808995b142b3966301f217c831e7cf31 - Christoph Hellwig <hch@xxxxxx>: - Use file_mnt_user_ns() helper. --- fs/fcntl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/fcntl.c b/fs/fcntl.c index 74d99731fd43..f6ac5285060d 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -25,6 +25,7 @@ #include <linux/user_namespace.h> #include <linux/memfd.h> #include <linux/compat.h> +#include <linux/mount.h> #include <linux/poll.h> #include <asm/siginfo.h> @@ -46,7 +47,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg) /* O_NOATIME can only be set by the owner or superuser */ if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME)) - if (!inode_owner_or_capable(&init_user_ns, inode)) + if (!inode_owner_or_capable(file_mnt_user_ns(filp), inode)) return -EPERM; /* required for strict SunOS emulation */ -- 2.30.0
