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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

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Pull security subsystem updates from James Morris:
 "Highlights:

   - TPM core and driver updates/fixes
   - IPv6 security labeling (CALIPSO)
   - Lots of Apparmor fixes
   - Seccomp: remove 2-phase API, close hole where ptrace can change
     syscall #"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (156 commits)
  apparmor: fix SECURITY_APPARMOR_HASH_DEFAULT parameter handling
  tpm: Add TPM 2.0 support to the Nuvoton i2c driver (NPCT6xx family)
  tpm: Factor out common startup code
  tpm: use devm_add_action_or_reset
  tpm2_i2c_nuvoton: add irq validity check
  tpm: read burstcount from TPM_STS in one 32-bit transaction
  tpm: fix byte-order for the value read by tpm2_get_tpm_pt
  tpm_tis_core: convert max timeouts from msec to jiffies
  apparmor: fix arg_size computation for when setprocattr is null terminated
  apparmor: fix oops, validate buffer size in apparmor_setprocattr()
  apparmor: do not expose kernel stack
  apparmor: fix module parameters can be changed after policy is locked
  apparmor: fix oops in profile_unpack() when policy_db is not present
  apparmor: don't check for vmalloc_addr if kvzalloc() failed
  apparmor: add missing id bounds check on dfa verification
  apparmor: allow SYS_CAP_RESOURCE to be sufficient to prlimit another task
  apparmor: use list_next_entry instead of list_entry_next
  apparmor: fix refcount race when finding a child profile
  apparmor: fix ref count leak when profile sha1 hash is read
  apparmor: check that xindex is in trans_table bounds
  ...
This commit is contained in:
Linus Torvalds
2016-07-29 17:38:46 -07:00
parent a867d7349e 7616ac70d1
commit 7a1e8b80fb
126 changed files with 7294 additions and 2144 deletions
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176
tools/testing/selftests/seccomp/seccomp_bpf.c
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@@ -1021,8 +1021,8 @@ void tracer_stop(int sig)
typedef void tracer_func_t(struct __test_metadata *_metadata,
pid_t tracee, int status, void *args);
void tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,
tracer_func_t tracer_func, void *args)
void start_tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,
tracer_func_t tracer_func, void *args, bool ptrace_syscall)
{
int ret = -1;
struct sigaction action = {
@@ -1042,12 +1042,16 @@ void tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,
/* Wait for attach stop */
wait(NULL);
ret = ptrace(PTRACE_SETOPTIONS, tracee, NULL, PTRACE_O_TRACESECCOMP);
ret = ptrace(PTRACE_SETOPTIONS, tracee, NULL, ptrace_syscall ?
PTRACE_O_TRACESYSGOOD :
PTRACE_O_TRACESECCOMP);
ASSERT_EQ(0, ret) {
TH_LOG("Failed to set PTRACE_O_TRACESECCOMP");
kill(tracee, SIGKILL);
}
ptrace(PTRACE_CONT, tracee, NULL, 0);
ret = ptrace(ptrace_syscall ? PTRACE_SYSCALL : PTRACE_CONT,
tracee, NULL, 0);
ASSERT_EQ(0, ret);
/* Unblock the tracee */
ASSERT_EQ(1, write(fd, "A", 1));
@@ -1063,12 +1067,13 @@ void tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,
/* Child is dead. Time to go. */
return;
/* Make sure this is a seccomp event. */
ASSERT_EQ(true, IS_SECCOMP_EVENT(status));
/* Check if this is a seccomp event. */
ASSERT_EQ(!ptrace_syscall, IS_SECCOMP_EVENT(status));
tracer_func(_metadata, tracee, status, args);
ret = ptrace(PTRACE_CONT, tracee, NULL, NULL);
ret = ptrace(ptrace_syscall ? PTRACE_SYSCALL : PTRACE_CONT,
tracee, NULL, 0);
ASSERT_EQ(0, ret);
}
/* Directly report the status of our test harness results. */
@@ -1079,7 +1084,7 @@ void tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,
void cont_handler(int num)
{ }
pid_t setup_trace_fixture(struct __test_metadata *_metadata,
tracer_func_t func, void *args)
tracer_func_t func, void *args, bool ptrace_syscall)
{
char sync;
int pipefd[2];
@@ -1095,7 +1100,8 @@ pid_t setup_trace_fixture(struct __test_metadata *_metadata,
signal(SIGALRM, cont_handler);
if (tracer_pid == 0) {
close(pipefd[0]);
tracer(_metadata, pipefd[1], tracee, func, args);
start_tracer(_metadata, pipefd[1], tracee, func, args,
ptrace_syscall);
syscall(__NR_exit, 0);
}
close(pipefd[1]);
@@ -1177,7 +1183,7 @@ FIXTURE_SETUP(TRACE_poke)
/* Launch tracer. */
self->tracer = setup_trace_fixture(_metadata, tracer_poke,
&self->tracer_args);
&self->tracer_args, false);
}
FIXTURE_TEARDOWN(TRACE_poke)
@@ -1399,6 +1405,29 @@ void tracer_syscall(struct __test_metadata *_metadata, pid_t tracee,
}
void tracer_ptrace(struct __test_metadata *_metadata, pid_t tracee,
int status, void *args)
{
int ret, nr;
unsigned long msg;
static bool entry;
/* Make sure we got an empty message. */
ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);
EXPECT_EQ(0, ret);
EXPECT_EQ(0, msg);
/* The only way to tell PTRACE_SYSCALL entry/exit is by counting. */
entry = !entry;
if (!entry)
return;
nr = get_syscall(_metadata, tracee);
if (nr == __NR_getpid)
change_syscall(_metadata, tracee, __NR_getppid);
}
FIXTURE_DATA(TRACE_syscall) {
struct sock_fprog prog;
pid_t tracer, mytid, mypid, parent;
@@ -1440,7 +1469,8 @@ FIXTURE_SETUP(TRACE_syscall)
ASSERT_NE(self->parent, self->mypid);
/* Launch tracer. */
self->tracer = setup_trace_fixture(_metadata, tracer_syscall, NULL);
self->tracer = setup_trace_fixture(_metadata, tracer_syscall, NULL,
false);
}
FIXTURE_TEARDOWN(TRACE_syscall)
@@ -1500,6 +1530,130 @@ TEST_F(TRACE_syscall, syscall_dropped)
EXPECT_NE(self->mytid, syscall(__NR_gettid));
}
TEST_F(TRACE_syscall, skip_after_RET_TRACE)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
offsetof(struct seccomp_data, nr)),
BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_getppid, 0, 1),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ERRNO | EPERM),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
};
struct sock_fprog prog = {
.len = (unsigned short)ARRAY_SIZE(filter),
.filter = filter,
};
long ret;
ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
ASSERT_EQ(0, ret);
/* Install fixture filter. */
ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &self->prog, 0, 0);
ASSERT_EQ(0, ret);
/* Install "errno on getppid" filter. */
ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog, 0, 0);
ASSERT_EQ(0, ret);
/* Tracer will redirect getpid to getppid, and we should see EPERM. */
EXPECT_EQ(-1, syscall(__NR_getpid));
EXPECT_EQ(EPERM, errno);
}
TEST_F_SIGNAL(TRACE_syscall, kill_after_RET_TRACE, SIGSYS)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
offsetof(struct seccomp_data, nr)),
BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_getppid, 0, 1),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_KILL),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
};
struct sock_fprog prog = {
.len = (unsigned short)ARRAY_SIZE(filter),
.filter = filter,
};
long ret;
ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
ASSERT_EQ(0, ret);
/* Install fixture filter. */
ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &self->prog, 0, 0);
ASSERT_EQ(0, ret);
/* Install "death on getppid" filter. */
ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog, 0, 0);
ASSERT_EQ(0, ret);
/* Tracer will redirect getpid to getppid, and we should die. */
EXPECT_NE(self->mypid, syscall(__NR_getpid));
}
TEST_F(TRACE_syscall, skip_after_ptrace)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
offsetof(struct seccomp_data, nr)),
BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_getppid, 0, 1),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ERRNO | EPERM),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
};
struct sock_fprog prog = {
.len = (unsigned short)ARRAY_SIZE(filter),
.filter = filter,
};
long ret;
/* Swap SECCOMP_RET_TRACE tracer for PTRACE_SYSCALL tracer. */
teardown_trace_fixture(_metadata, self->tracer);
self->tracer = setup_trace_fixture(_metadata, tracer_ptrace, NULL,
true);
ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
ASSERT_EQ(0, ret);
/* Install "errno on getppid" filter. */
ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog, 0, 0);
ASSERT_EQ(0, ret);
/* Tracer will redirect getpid to getppid, and we should see EPERM. */
EXPECT_EQ(-1, syscall(__NR_getpid));
EXPECT_EQ(EPERM, errno);
}
TEST_F_SIGNAL(TRACE_syscall, kill_after_ptrace, SIGSYS)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
offsetof(struct seccomp_data, nr)),
BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_getppid, 0, 1),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_KILL),
BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
};
struct sock_fprog prog = {
.len = (unsigned short)ARRAY_SIZE(filter),
.filter = filter,
};
long ret;
/* Swap SECCOMP_RET_TRACE tracer for PTRACE_SYSCALL tracer. */
teardown_trace_fixture(_metadata, self->tracer);
self->tracer = setup_trace_fixture(_metadata, tracer_ptrace, NULL,
true);
ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
ASSERT_EQ(0, ret);
/* Install "death on getppid" filter. */
ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog, 0, 0);
ASSERT_EQ(0, ret);
/* Tracer will redirect getpid to getppid, and we should die. */
EXPECT_NE(self->mypid, syscall(__NR_getpid));
}
#ifndef __NR_seccomp
# if defined(__i386__)
# define __NR_seccomp 354