[PATCH v2 5/6] samples/landlock: Add support for LANDLOCK_ACCESS_FS_IOCTL
From: "Günther Noack" <gnoack@google.com>
Date: 2023-06-23 14:44:53
Also in:
linux-fsdevel
Subsystem:
landlock security module, the rest · Maintainers:
Mickaël Salaün, Linus Torvalds
Add ioctl support to the Landlock sample tool. The ioctl right is grouped with the read-write rights in the sample tool, as some ioctl requests provide features that mutate state. Signed-off-by: Günther Noack <gnoack@google.com> --- samples/landlock/sandboxer.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c
index e2056c8b902c..c70d96d15c70 100644
--- a/samples/landlock/sandboxer.c
+++ b/samples/landlock/sandboxer.c@@ -77,7 +77,8 @@ static int parse_path(char *env_path, const char ***const path_list) LANDLOCK_ACCESS_FS_EXECUTE | \ LANDLOCK_ACCESS_FS_WRITE_FILE | \ LANDLOCK_ACCESS_FS_READ_FILE | \ - LANDLOCK_ACCESS_FS_TRUNCATE) + LANDLOCK_ACCESS_FS_TRUNCATE | \ + LANDLOCK_ACCESS_FS_IOCTL) /* clang-format on */
@@ -162,11 +163,12 @@ static int populate_ruleset(const char *const env_var, const int ruleset_fd, LANDLOCK_ACCESS_FS_MAKE_BLOCK | \ LANDLOCK_ACCESS_FS_MAKE_SYM | \ LANDLOCK_ACCESS_FS_REFER | \ - LANDLOCK_ACCESS_FS_TRUNCATE) + LANDLOCK_ACCESS_FS_TRUNCATE | \ + LANDLOCK_ACCESS_FS_IOCTL) /* clang-format on */ -#define LANDLOCK_ABI_LAST 3 +#define LANDLOCK_ABI_LAST 4 int main(const int argc, char *const argv[], char *const *const envp) {
@@ -255,6 +257,10 @@ int main(const int argc, char *const argv[], char *const *const envp) case 2: /* Removes LANDLOCK_ACCESS_FS_TRUNCATE for ABI < 3 */ ruleset_attr.handled_access_fs &= ~LANDLOCK_ACCESS_FS_TRUNCATE; + __attribute__((fallthrough)); + case 3: + /* Removes LANDLOCK_ACCESS_FS_IOCTL for ABI < 4 */ + ruleset_attr.handled_access_fs &= ~LANDLOCK_ACCESS_FS_IOCTL; fprintf(stderr, "Hint: You should update the running kernel "
--
2.41.0.162.gfafddb0af9-goog