[PATCH -next v2 5/6] landlock/samples: add chmod and chown support

update landlock sample to support the new flags LANDLOCK_ACCESS_FS_{CHMOD, CHGRP}

Signed-off-by: Xiu Jianfeng xiujianfeng@huawei.com --- samples/landlock/sandboxer.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c index 771b6b10d519..639ec39ebd0a 100644 --- a/samples/landlock/sandboxer.c +++ b/samples/landlock/sandboxer.c @@ -77,7 +77,9 @@ 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_CHMOD | \ + LANDLOCK_ACCESS_FS_CHGRP)

/* clang-format on */

@@ -162,7 +164,9 @@ 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_CHMOD | \ + LANDLOCK_ACCESS_FS_CHGRP)

/* clang-format on */

@@ -233,6 +237,11 @@ 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_{CHMOD, CHGRP} for ABI < 4 */ + ruleset_attr.handled_access_fs &= ~(LANDLOCK_ACCESS_FS_CHMOD | + LANDLOCK_ACCESS_FS_CHGRP); } access_fs_ro &= ruleset_attr.handled_access_fs; access_fs_rw &= ruleset_attr.handled_access_fs;