diff options
| author | Kees Cook <keescook@chromium.org> | 2021-04-06 00:39:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-19 11:56:44 +0300 |
| commit | 1ba874161ac34c0d1e8e4d4c6db8911b78896a91 (patch) | |
| tree | 6706a8ef4d98afebab4f6603c7734bc2ff476e17 | |
| parent | d9df1dce5090f087e55cee15c822be66b5c05fce (diff) | |
| download | linux-1ba874161ac34c0d1e8e4d4c6db8911b78896a91.tar.xz | |
debugfs: Make debugfs_allow RO after init
commit 312723a0b34d6d110aa4427a982536bb36ab8471 upstream.
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.c | 2 |
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 |