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authorKees Cook <keescook@chromium.org>2021-04-05 14:39:59 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-04-09 16:58:15 +0200
commit312723a0b34d6d110aa4427a982536bb36ab8471 (patch)
tree09491e458150de425af70e214cec1719a5385f82
parentc2f3f755f5c717f3621b33ef06d974b9cec4a104 (diff)
downloadlinux-312723a0b34d6d110aa4427a982536bb36ab8471.tar.gz
debugfs: Make debugfs_allow RO after init
Since debugfs_allow is only set at boot time during __init, make it read-only after being set. Fixes: a24c6f7bc923 ("debugfs: Add access restriction option") Cc: Peter Enderborg <peter.enderborg@sony.com> Reviewed-by: Peter Enderborg <peter.enderborg@sony.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210405213959.3079432-1-keescook@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/debugfs/inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 22e86ae4dd5a..1d252164d97b 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -35,7 +35,7 @@
static struct vfsmount *debugfs_mount;
static int debugfs_mount_count;
static bool debugfs_registered;
-static unsigned int debugfs_allow = DEFAULT_DEBUGFS_ALLOW_BITS;
+static unsigned int debugfs_allow __ro_after_init = DEFAULT_DEBUGFS_ALLOW_BITS;
/*
* Don't allow access attributes to be changed whilst the kernel is locked down