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@xxxxxxxxxx>
---
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 "
--
2.41.0.694.ge786442a9b-goog
