diff options
Diffstat (limited to 'src/xz')
| -rw-r--r-- | src/xz/sandbox.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/src/xz/sandbox.c b/src/xz/sandbox.c index 2c40db71..8a2c115c 100644 --- a/src/xz/sandbox.c +++ b/src/xz/sandbox.c @@ -107,8 +107,18 @@ sandbox_enable_strict_if_allowed(int src_fd lzma_attribute((__unused__)), #include <sys/prctl.h> -// Highest Landlock ABI version supported by this file -#define LANDLOCK_ABI_MAX 3 +// Highest Landlock ABI version supported by this file: +// - For ABI versions 1-3 we don't need anything from <linux/landlock.h> +// that isn't part of version 1. +// - For ABI version 4 we need the larger struct landlock_ruleset_attr +// with the handled_access_net member. That is bundled with the macros +// LANDLOCK_ACCESS_NET_BIND_TCP and LANDLOCK_ACCESS_NET_CONNECT_TCP. +#ifdef LANDLOCK_ACCESS_NET_BIND_TCP +# define LANDLOCK_ABI_MAX 4 +#else +# define LANDLOCK_ABI_MAX 3 +#endif + /// Landlock ABI version supported by the kernel static int landlock_abi; @@ -142,10 +152,15 @@ enable_landlock(uint64_t required_rights) // // This makes it simple to set the mask based on the ABI // version and we don't need to care which flags are #defined - // in the installed <linux/landlock.h>. + // in the installed <linux/landlock.h> for ABI versions 1-3. const struct landlock_ruleset_attr attr = { - .handled_access_fs = ((1ULL << (12 + landlock_abi)) - 1) - & ~required_rights, + .handled_access_fs = ~required_rights + & ((1ULL << (12 + my_min(3, landlock_abi))) - 1), +#if LANDLOCK_ABI_MAX >= 4 + .handled_access_net = landlock_abi < 4 ? 0 : + (LANDLOCK_ACCESS_NET_BIND_TCP + | LANDLOCK_ACCESS_NET_CONNECT_TCP), +#endif }; const int ruleset_fd = syscall(SYS_landlock_create_ruleset, |