diff options
| author | Günther Noack <gnoack3000@gmail.com> | 2026-03-27 17:48:31 +0100 |
|---|---|---|
| committer | Mickaël Salaün <mic@digikod.net> | 2026-04-07 18:51:07 +0200 |
| commit | a92cb5d7c6c988f304df355f4b5afcc379428f07 (patch) | |
| tree | dcfc100bd4d754bb2d5a8dd58269ce2b5c240ad9 /samples | |
| parent | a46e32db1fb7acac49a35773345d4bcf343847f5 (diff) | |
samples/landlock: Add support for named UNIX domain socket restrictions
The access right for UNIX domain socket lookups is grouped with the
read-write rights in the sample tool. Rationale: In the general case,
any operations are possible through a UNIX domain socket, including
data-mutating operations.
Cc: Justin Suess <utilityemal77@gmail.com>
Cc: Mickaël Salaün <mic@digikod.net>
Signed-off-by: Günther Noack <gnoack3000@gmail.com>
Link: https://lore.kernel.org/r/20260327164838.38231-7-gnoack3000@gmail.com
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/landlock/sandboxer.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c index 9f21088c0855..66e56ae275c6 100644 --- a/samples/landlock/sandboxer.c +++ b/samples/landlock/sandboxer.c @@ -111,7 +111,8 @@ 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_RESOLVE_UNIX) /* clang-format on */ @@ -295,11 +296,12 @@ out_unset: 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_RESOLVE_UNIX) /* clang-format on */ -#define LANDLOCK_ABI_LAST 8 +#define LANDLOCK_ABI_LAST 9 #define XSTR(s) #s #define STR(s) XSTR(s) @@ -438,6 +440,10 @@ int main(const int argc, char *const argv[], char *const *const envp) ~LANDLOCK_RESTRICT_SELF_LOG_NEW_EXEC_ON; __attribute__((fallthrough)); case 7: + case 8: + /* Removes LANDLOCK_ACCESS_FS_RESOLVE_UNIX for ABI < 9 */ + ruleset_attr.handled_access_fs &= + ~LANDLOCK_ACCESS_FS_RESOLVE_UNIX; /* Must be printed for any ABI < LANDLOCK_ABI_LAST. */ fprintf(stderr, "Hint: You should update the running kernel " |