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-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/audit.h8
-rw-r--r--include/linux/filter.h12
-rw-r--r--include/linux/key.h11
-rw-r--r--include/linux/keyctl.h1
-rw-r--r--include/linux/lsm_audit.h6
-rw-r--r--include/linux/prctl.h15
-rw-r--r--include/linux/ptrace.h5
-rw-r--r--include/linux/sched.h4
-rw-r--r--include/linux/seccomp.h107
-rw-r--r--include/linux/security.h14
11 files changed, 149 insertions, 35 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index b5d568fa19e8..0237b84ba541 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -330,6 +330,7 @@ header-y += scc.h
header-y += sched.h
header-y += screen_info.h
header-y += sdla.h
+header-y += seccomp.h
header-y += securebits.h
header-y += selinux_netlink.h
header-y += sem.h
diff --git a/include/linux/audit.h b/include/linux/audit.h
index ed3ef1972496..22f292a917a3 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -463,7 +463,7 @@ extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct dentry *dentry);
extern void __audit_inode_child(const struct dentry *dentry,
const struct inode *parent);
-extern void __audit_seccomp(unsigned long syscall);
+extern void __audit_seccomp(unsigned long syscall, long signr, int code);
extern void __audit_ptrace(struct task_struct *t);
static inline int audit_dummy_context(void)
@@ -508,10 +508,10 @@ static inline void audit_inode_child(const struct dentry *dentry,
}
void audit_core_dumps(long signr);
-static inline void audit_seccomp(unsigned long syscall)
+static inline void audit_seccomp(unsigned long syscall, long signr, int code)
{
if (unlikely(!audit_dummy_context()))
- __audit_seccomp(syscall);
+ __audit_seccomp(syscall, signr, code);
}
static inline void audit_ptrace(struct task_struct *t)
@@ -634,7 +634,7 @@ extern int audit_signals;
#define audit_inode(n,d) do { (void)(d); } while (0)
#define audit_inode_child(i,p) do { ; } while (0)
#define audit_core_dumps(i) do { ; } while (0)
-#define audit_seccomp(i) do { ; } while (0)
+#define audit_seccomp(i,s,c) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) (0)
#define audit_get_loginuid(t) (-1)
#define audit_get_sessionid(t) (-1)
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 72090994d789..82b01357af8b 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -10,6 +10,7 @@
#ifdef __KERNEL__
#include <linux/atomic.h>
+#include <linux/compat.h>
#endif
/*
@@ -133,6 +134,16 @@ struct sock_fprog { /* Required for SO_ATTACH_FILTER. */
#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+/*
+ * A struct sock_filter is architecture independent.
+ */
+struct compat_sock_fprog {
+ u16 len;
+ compat_uptr_t filter; /* struct sock_filter * */
+};
+#endif
+
struct sk_buff;
struct sock;
@@ -233,6 +244,7 @@ enum {
BPF_S_ANC_RXHASH,
BPF_S_ANC_CPU,
BPF_S_ANC_ALU_XOR_X,
+ BPF_S_ANC_SECCOMP_LD_W,
};
#endif /* __KERNEL__ */
diff --git a/include/linux/key.h b/include/linux/key.h
index 96933b1e5d24..5231800770e1 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -124,7 +124,10 @@ static inline unsigned long is_key_possessed(const key_ref_t key_ref)
struct key {
atomic_t usage; /* number of references */
key_serial_t serial; /* key serial number */
- struct rb_node serial_node;
+ union {
+ struct list_head graveyard_link;
+ struct rb_node serial_node;
+ };
struct key_type *type; /* type of key */
struct rw_semaphore sem; /* change vs change sem */
struct key_user *user; /* owner of this key */
@@ -133,6 +136,7 @@ struct key {
time_t expiry; /* time at which key expires (or 0) */
time_t revoked_at; /* time at which key was revoked */
};
+ time_t last_used_at; /* last time used for LRU keyring discard */
uid_t uid;
gid_t gid;
key_perm_t perm; /* access permissions */
@@ -156,6 +160,7 @@ struct key {
#define KEY_FLAG_USER_CONSTRUCT 4 /* set if key is being constructed in userspace */
#define KEY_FLAG_NEGATIVE 5 /* set if key is negative */
#define KEY_FLAG_ROOT_CAN_CLEAR 6 /* set if key can be cleared by root without permission */
+#define KEY_FLAG_INVALIDATED 7 /* set if key has been invalidated */
/* the description string
* - this is used to match a key against search criteria
@@ -199,6 +204,7 @@ extern struct key *key_alloc(struct key_type *type,
#define KEY_ALLOC_NOT_IN_QUOTA 0x0002 /* not in quota */
extern void key_revoke(struct key *key);
+extern void key_invalidate(struct key *key);
extern void key_put(struct key *key);
static inline struct key *key_get(struct key *key)
@@ -236,7 +242,7 @@ extern struct key *request_key_async_with_auxdata(struct key_type *type,
extern int wait_for_key_construction(struct key *key, bool intr);
-extern int key_validate(struct key *key);
+extern int key_validate(const struct key *key);
extern key_ref_t key_create_or_update(key_ref_t keyring,
const char *type,
@@ -319,6 +325,7 @@ extern void key_init(void);
#define key_serial(k) 0
#define key_get(k) ({ NULL; })
#define key_revoke(k) do { } while(0)
+#define key_invalidate(k) do { } while(0)
#define key_put(k) do { } while(0)
#define key_ref_put(k) do { } while(0)
#define make_key_ref(k, p) NULL
diff --git a/include/linux/keyctl.h b/include/linux/keyctl.h
index 9b0b865ce622..c9b7f4faf97a 100644
--- a/include/linux/keyctl.h
+++ b/include/linux/keyctl.h
@@ -55,5 +55,6 @@
#define KEYCTL_SESSION_TO_PARENT 18 /* apply session keyring to parent process */
#define KEYCTL_REJECT 19 /* reject a partially constructed key */
#define KEYCTL_INSTANTIATE_IOV 20 /* instantiate a partially constructed key */
+#define KEYCTL_INVALIDATE 21 /* invalidate a key */
#endif /* _LINUX_KEYCTL_H */
diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
index fad48aab893b..1cc89e9df480 100644
--- a/include/linux/lsm_audit.h
+++ b/include/linux/lsm_audit.h
@@ -53,7 +53,6 @@ struct common_audit_data {
#define LSM_AUDIT_DATA_KMOD 8
#define LSM_AUDIT_DATA_INODE 9
#define LSM_AUDIT_DATA_DENTRY 10
- struct task_struct *tsk;
union {
struct path path;
struct dentry *dentry;
@@ -93,11 +92,6 @@ int ipv4_skb_to_auditdata(struct sk_buff *skb,
int ipv6_skb_to_auditdata(struct sk_buff *skb,
struct common_audit_data *ad, u8 *proto);
-/* Initialize an LSM audit data structure. */
-#define COMMON_AUDIT_DATA_INIT(_d, _t) \
- { memset((_d), 0, sizeof(struct common_audit_data)); \
- (_d)->type = LSM_AUDIT_DATA_##_t; }
-
void common_lsm_audit(struct common_audit_data *a,
void (*pre_audit)(struct audit_buffer *, void *),
void (*post_audit)(struct audit_buffer *, void *));
diff --git a/include/linux/prctl.h b/include/linux/prctl.h
index e0cfec2490aa..78b76e24cc7e 100644
--- a/include/linux/prctl.h
+++ b/include/linux/prctl.h
@@ -124,4 +124,19 @@
#define PR_SET_CHILD_SUBREAPER 36
#define PR_GET_CHILD_SUBREAPER 37
+/*
+ * If no_new_privs is set, then operations that grant new privileges (i.e.
+ * execve) will either fail or not grant them. This affects suid/sgid,
+ * file capabilities, and LSMs.
+ *
+ * Operations that merely manipulate or drop existing privileges (setresuid,
+ * capset, etc.) will still work. Drop those privileges if you want them gone.
+ *
+ * Changing LSM security domain is considered a new privilege. So, for example,
+ * asking selinux for a specific new context (e.g. with runcon) will result
+ * in execve returning -EPERM.
+ */
+#define PR_SET_NO_NEW_PRIVS 38
+#define PR_GET_NO_NEW_PRIVS 39
+
#endif /* _LINUX_PRCTL_H */
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 5c719627c2aa..597e4fdb97fe 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -58,6 +58,7 @@
#define PTRACE_EVENT_EXEC 4
#define PTRACE_EVENT_VFORK_DONE 5
#define PTRACE_EVENT_EXIT 6
+#define PTRACE_EVENT_SECCOMP 7
/* Extended result codes which enabled by means other than options. */
#define PTRACE_EVENT_STOP 128
@@ -69,8 +70,9 @@
#define PTRACE_O_TRACEEXEC (1 << PTRACE_EVENT_EXEC)
#define PTRACE_O_TRACEVFORKDONE (1 << PTRACE_EVENT_VFORK_DONE)
#define PTRACE_O_TRACEEXIT (1 << PTRACE_EVENT_EXIT)
+#define PTRACE_O_TRACESECCOMP (1 << PTRACE_EVENT_SECCOMP)
-#define PTRACE_O_MASK 0x0000007f
+#define PTRACE_O_MASK 0x000000ff
#include <asm/ptrace.h>
@@ -98,6 +100,7 @@
#define PT_TRACE_EXEC PT_EVENT_FLAG(PTRACE_EVENT_EXEC)
#define PT_TRACE_VFORK_DONE PT_EVENT_FLAG(PTRACE_EVENT_VFORK_DONE)
#define PT_TRACE_EXIT PT_EVENT_FLAG(PTRACE_EVENT_EXIT)
+#define PT_TRACE_SECCOMP PT_EVENT_FLAG(PTRACE_EVENT_SECCOMP)
/* single stepping state bits (used on ARM and PA-RISC) */
#define PT_SINGLESTEP_BIT 31
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8f3fd945070f..f774d88cd0aa 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1341,6 +1341,8 @@ struct task_struct {
* execve */
unsigned in_iowait:1;
+ /* task may not gain privileges */
+ unsigned no_new_privs:1;
/* Revert to default priority/policy when forking */
unsigned sched_reset_on_fork:1;
@@ -1450,7 +1452,7 @@ struct task_struct {
uid_t loginuid;
unsigned int sessionid;
#endif
- seccomp_t seccomp;
+ struct seccomp seccomp;
/* Thread group tracking */
u32 parent_exec_id;
diff --git a/include/linux/seccomp.h b/include/linux/seccomp.h
index cc7a4e9cc7ad..84f6320da50f 100644
--- a/include/linux/seccomp.h
+++ b/include/linux/seccomp.h
@@ -1,25 +1,90 @@
#ifndef _LINUX_SECCOMP_H
#define _LINUX_SECCOMP_H
-
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+
+/* Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, <mode>) */
+#define SECCOMP_MODE_DISABLED 0 /* seccomp is not in use. */
+#define SECCOMP_MODE_STRICT 1 /* uses hard-coded filter. */
+#define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */
+
+/*
+ * All BPF programs must return a 32-bit value.
+ * The bottom 16-bits are for optional return data.
+ * The upper 16-bits are ordered from least permissive values to most.
+ *
+ * The ordering ensures that a min_t() over composed return values always
+ * selects the least permissive choice.
+ */
+#define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */
+#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */
+#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */
+#define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */
+#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */
+
+/* Masks for the return value sections. */
+#define SECCOMP_RET_ACTION 0x7fff0000U
+#define SECCOMP_RET_DATA 0x0000ffffU
+
+/**
+ * struct seccomp_data - the format the BPF program executes over.
+ * @nr: the system call number
+ * @arch: indicates system call convention as an AUDIT_ARCH_* value
+ * as defined in <linux/audit.h>.
+ * @instruction_pointer: at the time of the system call.
+ * @args: up to 6 system call arguments always stored as 64-bit values
+ * regardless of the architecture.
+ */
+struct seccomp_data {
+ int nr;
+ __u32 arch;
+ __u64 instruction_pointer;
+ __u64 args[6];
+};
+
+#ifdef __KERNEL__
#ifdef CONFIG_SECCOMP
#include <linux/thread_info.h>
#include <asm/seccomp.h>
-typedef struct { int mode; } seccomp_t;
-
-extern void __secure_computing(int);
-static inline void secure_computing(int this_syscall)
+struct seccomp_filter;
+/**
+ * struct seccomp - the state of a seccomp'ed process
+ *
+ * @mode: indicates one of the valid values above for controlled
+ * system calls available to a process.
+ * @filter: The metadata and ruleset for determining what system calls
+ * are allowed for a task.
+ *
+ * @filter must only be accessed from the context of current as there
+ * is no locking.
+ */
+struct seccomp {
+ int mode;
+ struct seccomp_filter *filter;
+};
+
+extern int __secure_computing(int);
+static inline int secure_computing(int this_syscall)
{
if (unlikely(test_thread_flag(TIF_SECCOMP)))
- __secure_computing(this_syscall);
+ return __secure_computing(this_syscall);
+ return 0;
+}
+
+/* A wrapper for architectures supporting only SECCOMP_MODE_STRICT. */
+static inline void secure_computing_strict(int this_syscall)
+{
+ BUG_ON(secure_computing(this_syscall) != 0);
}
extern long prctl_get_seccomp(void);
-extern long prctl_set_seccomp(unsigned long);
+extern long prctl_set_seccomp(unsigned long, char __user *);
-static inline int seccomp_mode(seccomp_t *s)
+static inline int seccomp_mode(struct seccomp *s)
{
return s->mode;
}
@@ -28,25 +93,41 @@ static inline int seccomp_mode(seccomp_t *s)
#include <linux/errno.h>
-typedef struct { } seccomp_t;
+struct seccomp { };
+struct seccomp_filter { };
-#define secure_computing(x) do { } while (0)
+static inline int secure_computing(int this_syscall) { return 0; }
+static inline void secure_computing_strict(int this_syscall) { return; }
static inline long prctl_get_seccomp(void)
{
return -EINVAL;
}
-static inline long prctl_set_seccomp(unsigned long arg2)
+static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
{
return -EINVAL;
}
-static inline int seccomp_mode(seccomp_t *s)
+static inline int seccomp_mode(struct seccomp *s)
{
return 0;
}
-
#endif /* CONFIG_SECCOMP */
+#ifdef CONFIG_SECCOMP_FILTER
+extern void put_seccomp_filter(struct task_struct *tsk);
+extern void get_seccomp_filter(struct task_struct *tsk);
+extern u32 seccomp_bpf_load(int off);
+#else /* CONFIG_SECCOMP_FILTER */
+static inline void put_seccomp_filter(struct task_struct *tsk)
+{
+ return;
+}
+static inline void get_seccomp_filter(struct task_struct *tsk)
+{
+ return;
+}
+#endif /* CONFIG_SECCOMP_FILTER */
+#endif /* __KERNEL__ */
#endif /* _LINUX_SECCOMP_H */
diff --git a/include/linux/security.h b/include/linux/security.h
index 673afbb8238a..ab0e091ce5fa 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -144,6 +144,7 @@ struct request_sock;
#define LSM_UNSAFE_SHARE 1
#define LSM_UNSAFE_PTRACE 2
#define LSM_UNSAFE_PTRACE_CAP 4
+#define LSM_UNSAFE_NO_NEW_PRIVS 8
#ifdef CONFIG_MMU
extern int mmap_min_addr_handler(struct ctl_table *table, int write,
@@ -639,10 +640,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
* to receive an open file descriptor via socket IPC.
* @file contains the file structure being received.
* Return 0 if permission is granted.
- *
- * Security hook for dentry
- *
- * @dentry_open
+ * @file_open
* Save open-time permission checking state for later use upon
* file_permission, and recheck access if anything has changed
* since inode_permission.
@@ -1497,7 +1495,7 @@ struct security_operations {
int (*file_send_sigiotask) (struct task_struct *tsk,
struct fown_struct *fown, int sig);
int (*file_receive) (struct file *file);
- int (*dentry_open) (struct file *file, const struct cred *cred);
+ int (*file_open) (struct file *file, const struct cred *cred);
int (*task_create) (unsigned long clone_flags);
void (*task_free) (struct task_struct *task);
@@ -1756,7 +1754,7 @@ int security_file_set_fowner(struct file *file);
int security_file_send_sigiotask(struct task_struct *tsk,
struct fown_struct *fown, int sig);
int security_file_receive(struct file *file);
-int security_dentry_open(struct file *file, const struct cred *cred);
+int security_file_open(struct file *file, const struct cred *cred);
int security_task_create(unsigned long clone_flags);
void security_task_free(struct task_struct *task);
int security_cred_alloc_blank(struct cred *cred, gfp_t gfp);
@@ -2227,8 +2225,8 @@ static inline int security_file_receive(struct file *file)
return 0;
}
-static inline int security_dentry_open(struct file *file,
- const struct cred *cred)
+static inline int security_file_open(struct file *file,
+ const struct cred *cred)
{
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-12 22:23:39 +0300