On Tue, 2026-11-10 at 10:14 +0100, Christian Brauner wrote: > Initialize all kernfs based filesystems as pseudo filesystems in > kernfs_get_tree() instead of raising SB_I_NOEXEC and SB_I_NODEV by > hand > in kernfs_fill_super(). This adds SB_I_PSEUDO for sysfs, cgroupfs and > resctrl. > > Signed-off-by: Christian Brauner (Amutable) <[email protected]>
Reviewed-by: Alexander Mikhalitsyn <[email protected]> > --- > fs/kernfs/mount.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c > index a0be784bfb06..6b60d212b003 100644 > --- a/fs/kernfs/mount.c > +++ b/fs/kernfs/mount.c > @@ -8,6 +8,7 @@ > */ > > #include <linux/fs.h> > +#include <linux/pseudo_fs.h> > #include <linux/mount.h> > #include <linux/init.h> > #include <linux/magic.h> > @@ -298,8 +299,6 @@ static int kernfs_fill_super(struct super_block > *sb, struct kernfs_fs_context *k > struct dentry *root; > > info->sb = sb; > - /* Userspace would break if executables or devices appear on > sysfs */ > - sb->s_iflags |= SB_I_NOEXEC | SB_I_NODEV; > sb->s_blocksize = PAGE_SIZE; > sb->s_blocksize_bits = PAGE_SHIFT; > sb->s_magic = kfc->magic; > @@ -388,6 +387,7 @@ int kernfs_get_tree(struct fs_context *fc) > info->ns = kfc->ns_tag; > INIT_LIST_HEAD(&info->node); > > + fc_init_pseudo(fc); > fc->s_fs_info = info; > sb = sget_fc(fc, kernfs_test_super, kernfs_set_super); > if (IS_ERR(sb))
