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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: G=C3=BCnther Noack --- samples/landlock/sandboxer.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c index 08596c0ef070..c5228e8c4817 100644 --- a/samples/landlock/sandboxer.c +++ b/samples/landlock/sandboxer.c @@ -81,7 +81,8 @@ 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_DEV) =20 /* clang-format on */ =20 @@ -199,11 +200,12 @@ static int populate_ruleset_net(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_DEV) =20 /* clang-format on */ =20 -#define LANDLOCK_ABI_LAST 4 +#define LANDLOCK_ABI_LAST 5 =20 int main(const int argc, char *const argv[], char *const *const envp) { @@ -317,6 +319,11 @@ int main(const int argc, char *const argv[], char *con= st *const envp) ruleset_attr.handled_access_net &=3D ~(LANDLOCK_ACCESS_NET_BIND_TCP | LANDLOCK_ACCESS_NET_CONNECT_TCP); + __attribute__((fallthrough)); + case 4: + /* Removes LANDLOCK_ACCESS_FS_IOCTL_DEV for ABI < 5 */ + ruleset_attr.handled_access_fs &=3D ~LANDLOCK_ACCESS_FS_IOCTL_DEV; + fprintf(stderr, "Hint: You should update the running kernel " "to leverage Landlock features " --=20 2.44.0.278.ge034bb2e1d-goog