[PATCH 4/5] samples/landlock: add support for chown and chmod

Jeffrey Bencteux jeff at bencteux.fr
Sun Apr 12 09:50:43 UTC 2026


Update sandboxer.c sample code with restriction for chown and chmod
system calls families

Signed-off-by: Jeffrey Bencteux <jeff at bencteux.fr>
---
 samples/landlock/sandboxer.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c
index e7af02f98208..551e9a33665a 100644
--- a/samples/landlock/sandboxer.c
+++ b/samples/landlock/sandboxer.c
@@ -111,7 +111,9 @@ static int parse_path(char *env_path, const char ***const path_list)
 	LANDLOCK_ACCESS_FS_WRITE_FILE | \
 	LANDLOCK_ACCESS_FS_READ_FILE | \
 	LANDLOCK_ACCESS_FS_TRUNCATE | \
-	LANDLOCK_ACCESS_FS_IOCTL_DEV)
+	LANDLOCK_ACCESS_FS_IOCTL_DEV | \
+	LANDLOCK_ACCESS_FS_CHMOD | \
+	LANDLOCK_ACCESS_FS_CHOWN)
 
 /* clang-format on */
 
@@ -295,7 +297,9 @@ static bool check_ruleset_scope(const char *const env_var,
 	LANDLOCK_ACCESS_FS_MAKE_SYM | \
 	LANDLOCK_ACCESS_FS_REFER | \
 	LANDLOCK_ACCESS_FS_TRUNCATE | \
-	LANDLOCK_ACCESS_FS_IOCTL_DEV)
+	LANDLOCK_ACCESS_FS_IOCTL_DEV | \
+	LANDLOCK_ACCESS_FS_CHMOD | \
+	LANDLOCK_ACCESS_FS_CHOWN)
 
 /* clang-format on */
 
-- 
2.53.0




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