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Merge pull request #6952 from poettering/seccomp-getrlimit

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a seccomp fix regarding ugetrlimit/prlimit64
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2017-10-05 13:22:03 +02:00 committed by GitHub
commit be03929503
2 changed files with 19 additions and 12 deletions
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1
src/nspawn/nspawn-seccomp.c
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@ -136,7 +136,6 @@ static int seccomp_add_default_syscall_filter(
{ 0, "syncfs" },
{ 0, "sysinfo" },
{ 0, "tee" },
{ 0, "ugetrlimit" },
{ 0, "umask" },
{ 0, "uname" },
{ 0, "userfaultfd" },

30
src/shared/seccomp-util.c
View File

@ -306,6 +306,7 @@ const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
"membarrier\0"
"nanosleep\0"
"pause\0"
"prlimit64\0"
"restart_syscall\0"
"rt_sigreturn\0"
"sched_yield\0"
@ -314,6 +315,7 @@ const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
"set_tid_address\0"
"sigreturn\0"
"time\0"
"ugetrlimit\0"
},
[SYSCALL_FILTER_SET_BASIC_IO] = {
.name = "@basic-io",
@ -693,7 +695,6 @@ const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
"migrate_pages\0"
"move_pages\0"
"nice\0"
"prlimit64\0"
"sched_setaffinity\0"
"sched_setattr\0"
"sched_setparam\0"
@ -806,8 +807,8 @@ int seccomp_add_syscall_filter_item(scmp_filter_ctx *seccomp, const char *name,
id = seccomp_syscall_resolve_name(name);
if (id == __NR_SCMP_ERROR) {
log_debug("System call %s is not known!", name);
return -EINVAL; /* Not known at all? Then that's a real error */
log_debug("System call %s is not known, ignoring.", name);
return 0;
}
r = seccomp_rule_add_exact(seccomp, action, id, 0);
@ -1186,7 +1187,6 @@ int seccomp_restrict_address_families(Set *address_families, bool whitelist) {
if (r < 0)
break;
}
if (r < 0) {
log_debug_errno(r, "Failed to add socket() rule for architecture %s, skipping: %m", seccomp_arch_to_string(arch));
continue;
@ -1211,7 +1211,6 @@ int seccomp_restrict_address_families(Set *address_families, bool whitelist) {
if (r < 0)
break;
}
if (r < 0) {
log_debug_errno(r, "Failed to add socket() rule for architecture %s, skipping: %m", seccomp_arch_to_string(arch));
continue;
@ -1452,7 +1451,13 @@ int seccomp_restrict_archs(Set *archs) {
if (r < 0)
return r;
return seccomp_load(seccomp);
r = seccomp_load(seccomp);
if (IN_SET(r, -EPERM, -EACCES))
return r;
if (r < 0)
log_debug_errno(r, "Failed to restrict system call architectures, skipping: %m");
return 0;
}
int parse_syscall_archs(char **l, Set **archs) {
@ -1500,7 +1505,6 @@ int seccomp_filter_set_add(Set *filter, bool add, const SyscallFilterSet *set) {
if (!more)
return -ENXIO;
r = seccomp_filter_set_add(filter, add, more);
if (r < 0)
return r;
@ -1508,8 +1512,10 @@ int seccomp_filter_set_add(Set *filter, bool add, const SyscallFilterSet *set) {
int id;
id = seccomp_syscall_resolve_name(i);
if (id == __NR_SCMP_ERROR)
return -ENXIO;
if (id == __NR_SCMP_ERROR) {
log_debug("Couldn't resolve system call, ignoring: %s", i);
continue;
}
if (add) {
r = set_put(filter, INT_TO_PTR(id + 1));
@ -1543,8 +1549,10 @@ int seccomp_lock_personality(unsigned long personality) {
SCMP_SYS(personality),
1,
SCMP_A0(SCMP_CMP_NE, personality));
if (r < 0)
return r;
if (r < 0) {
log_debug_errno(r, "Failed to add scheduler rule for architecture %s, skipping: %m", seccomp_arch_to_string(arch));
continue;
}
r = seccomp_load(seccomp);
if (IN_SET(r, -EPERM, -EACCES))