Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] debugfs: Make debugfs_allow RO after init | Date | Mon, 5 Apr 2021 14:39:59 -0700 |
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Since debugfs_allow is only set at boot time during __init, make it read-only after being set.
Cc: Peter Enderborg <peter.enderborg@sony.com> Fixes: a24c6f7bc923 ("debugfs: Add access restriction option") Signed-off-by: Kees Cook <keescook@chromium.org> --- fs/debugfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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 -- 2.25.1
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