diff options
| author | Felipe Sateler <fsateler@users.noreply.github.com> | 2016-08-22 16:40:58 -0300 |
|---|---|---|
| committer | Evgeny Vereshchagin <evvers@ya.ru> | 2016-08-22 22:40:58 +0300 |
| commit | 83f12b27d14853e7c89a326f7cd31a6c739d378e (patch) | |
| tree | a422aeadd910a844174690dea8e415069e799470 /src/core/execute.c | |
| parent | 05b4d3b55c0a60aa17817d51129f2bc83914c1f4 (diff) | |
core: do not fail at step SECCOMP if there is no kernel support (#4004)
Fixes #3882
Diffstat (limited to 'src/core/execute.c')
| -rw-r--r-- | src/core/execute.c | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/src/core/execute.c b/src/core/execute.c index 0af8eb5a02..55f15d7e49 100644 --- a/src/core/execute.c +++ b/src/core/execute.c @@ -1074,7 +1074,17 @@ static void rename_process_from_path(const char *path) { #ifdef HAVE_SECCOMP -static int apply_seccomp(const ExecContext *c) { +static bool skip_seccomp_unavailable(const Unit* u, const char* msg) { + if (!is_seccomp_available()) { + log_open(); + log_unit_debug(u, "SECCOMP not detected in the kernel, skipping %s", msg); + log_close(); + return true; + } + return false; +} + +static int apply_seccomp(const Unit* u, const ExecContext *c) { uint32_t negative_action, action; scmp_filter_ctx *seccomp; Iterator i; @@ -1083,6 +1093,9 @@ static int apply_seccomp(const ExecContext *c) { assert(c); + if (skip_seccomp_unavailable(u, "syscall filtering")) + return 0; + negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); @@ -1123,13 +1136,16 @@ finish: return r; } -static int apply_address_families(const ExecContext *c) { +static int apply_address_families(const Unit* u, const ExecContext *c) { scmp_filter_ctx *seccomp; Iterator i; int r; assert(c); + if (skip_seccomp_unavailable(u, "RestrictAddressFamilies=")) + return 0; + seccomp = seccomp_init(SCMP_ACT_ALLOW); if (!seccomp) return -ENOMEM; @@ -1244,12 +1260,15 @@ finish: return r; } -static int apply_memory_deny_write_execute(const ExecContext *c) { +static int apply_memory_deny_write_execute(const Unit* u, const ExecContext *c) { scmp_filter_ctx *seccomp; int r; assert(c); + if (skip_seccomp_unavailable(u, "MemoryDenyWriteExecute=")) + return 0; + seccomp = seccomp_init(SCMP_ACT_ALLOW); if (!seccomp) return -ENOMEM; @@ -1283,7 +1302,7 @@ finish: return r; } -static int apply_restrict_realtime(const ExecContext *c) { +static int apply_restrict_realtime(const Unit* u, const ExecContext *c) { static const int permitted_policies[] = { SCHED_OTHER, SCHED_BATCH, @@ -1296,6 +1315,9 @@ static int apply_restrict_realtime(const ExecContext *c) { assert(c); + if (skip_seccomp_unavailable(u, "RestrictRealtime=")) + return 0; + seccomp = seccomp_init(SCMP_ACT_ALLOW); if (!seccomp) return -ENOMEM; @@ -2403,7 +2425,7 @@ static int exec_child( #ifdef HAVE_SECCOMP if (use_address_families) { - r = apply_address_families(context); + r = apply_address_families(unit, context); if (r < 0) { *exit_status = EXIT_ADDRESS_FAMILIES; return r; @@ -2411,7 +2433,7 @@ static int exec_child( } if (context->memory_deny_write_execute) { - r = apply_memory_deny_write_execute(context); + r = apply_memory_deny_write_execute(unit, context); if (r < 0) { *exit_status = EXIT_SECCOMP; return r; @@ -2419,7 +2441,7 @@ static int exec_child( } if (context->restrict_realtime) { - r = apply_restrict_realtime(context); + r = apply_restrict_realtime(unit, context); if (r < 0) { *exit_status = EXIT_SECCOMP; return r; @@ -2427,7 +2449,7 @@ static int exec_child( } if (use_syscall_filter) { - r = apply_seccomp(context); + r = apply_seccomp(unit, context); if (r < 0) { *exit_status = EXIT_SECCOMP; return r; |