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authorLennart Poettering <lennart@poettering.net>2016-11-02 08:46:18 -0600
committerLennart Poettering <lennart@poettering.net>2016-11-02 08:50:00 -0600
commit133ddbbeae74fc06173633605b3e612e934bc2dd (patch)
treee642c6e827ecbd0ee47be2628e05c22aa389055c /src/shared
parentaa6b9cec8813c2135049cecc2247a202ff6e311d (diff)
seccomp: add two new syscall groups
@resources contains various syscalls that alter resource limits and memory and scheduling parameters of processes. As such they are good candidates to block for most services. @basic-io contains a number of basic syscalls for I/O, similar to the list seccomp v1 permitted but slightly more complete. It should be useful for building basic whitelisting for minimal sandboxes
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/seccomp-util.c34
-rw-r--r--src/shared/seccomp-util.h2
2 files changed, 36 insertions, 0 deletions
diff --git a/src/shared/seccomp-util.c b/src/shared/seccomp-util.c
index e0a61aa358..c9b24f1065 100644
--- a/src/shared/seccomp-util.c
+++ b/src/shared/seccomp-util.c
@@ -217,6 +217,24 @@ bool is_seccomp_available(void) {
}
const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
+ [SYSCALL_FILTER_SET_BASIC_IO] = {
+ /* Basic IO */
+ .name = "@basic-io",
+ .value =
+ "close\0"
+ "dup2\0"
+ "dup3\0"
+ "dup\0"
+ "lseek\0"
+ "pread64\0"
+ "preadv\0"
+ "pwrite64\0"
+ "pwritev\0"
+ "read\0"
+ "readv\0"
+ "write\0"
+ "writev\0"
+ },
[SYSCALL_FILTER_SET_CLOCK] = {
/* Clock */
.name = "@clock",
@@ -472,6 +490,22 @@ const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
"s390_pci_mmio_write\0"
#endif
},
+ [SYSCALL_FILTER_SET_RESOURCES] = {
+ /* Alter resource settings */
+ .name = "@resources",
+ .value =
+ "sched_setparam\0"
+ "sched_setscheduler\0"
+ "sched_setaffinity\0"
+ "setpriority\0"
+ "setrlimit\0"
+ "set_mempolicy\0"
+ "migrate_pages\0"
+ "move_pages\0"
+ "mbind\0"
+ "sched_setattr\0"
+ "prlimit64\0"
+ },
};
const SyscallFilterSet *syscall_filter_set_find(const char *name) {
diff --git a/src/shared/seccomp-util.h b/src/shared/seccomp-util.h
index 8050fc6fbf..8e209efef2 100644
--- a/src/shared/seccomp-util.h
+++ b/src/shared/seccomp-util.h
@@ -38,6 +38,7 @@ typedef struct SyscallFilterSet {
} SyscallFilterSet;
enum {
+ SYSCALL_FILTER_SET_BASIC_IO,
SYSCALL_FILTER_SET_CLOCK,
SYSCALL_FILTER_SET_CPU_EMULATION,
SYSCALL_FILTER_SET_DEBUG,
@@ -52,6 +53,7 @@ enum {
SYSCALL_FILTER_SET_PRIVILEGED,
SYSCALL_FILTER_SET_PROCESS,
SYSCALL_FILTER_SET_RAW_IO,
+ SYSCALL_FILTER_SET_RESOURCES,
_SYSCALL_FILTER_SET_MAX
};