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audit/stable-4.18 PR 20180605
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This commit is contained in:
Linus Torvalds
commit
8b5c6a3a49
@ -207,13 +207,6 @@ directory. Here's a description of each file in that directory:
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to the file do not need to be in ordered form but reads from the file
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will be ordered in the same way as the actions_avail sysctl.
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It is important to note that the value of ``actions_logged`` does not
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prevent certain actions from being logged when the audit subsystem is
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configured to audit a task. If the action is not found in
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``actions_logged`` list, the final decision on whether to audit the
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action for that task is ultimately left up to the audit subsystem to
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decide for all seccomp return values other than ``SECCOMP_RET_ALLOW``.
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The ``allow`` string is not accepted in the ``actions_logged`` sysctl
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as it is not possible to log ``SECCOMP_RET_ALLOW`` actions. Attempting
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to write ``allow`` to the sysctl will result in an EINVAL being
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@ -232,12 +232,24 @@ extern void __audit_file(const struct file *);
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extern void __audit_inode_child(struct inode *parent,
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const struct dentry *dentry,
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const unsigned char type);
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extern void __audit_seccomp(unsigned long syscall, long signr, int code);
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extern void audit_seccomp(unsigned long syscall, long signr, int code);
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extern void audit_seccomp_actions_logged(const char *names,
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const char *old_names, int res);
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extern void __audit_ptrace(struct task_struct *t);
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static inline void audit_set_context(struct task_struct *task, struct audit_context *ctx)
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{
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task->audit_context = ctx;
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}
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static inline struct audit_context *audit_context(void)
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{
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return current->audit_context;
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}
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static inline bool audit_dummy_context(void)
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{
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void *p = current->audit_context;
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void *p = audit_context();
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return !p || *(int *)p;
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}
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static inline void audit_free(struct task_struct *task)
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@ -249,12 +261,12 @@ static inline void audit_syscall_entry(int major, unsigned long a0,
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unsigned long a1, unsigned long a2,
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unsigned long a3)
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{
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if (unlikely(current->audit_context))
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if (unlikely(audit_context()))
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__audit_syscall_entry(major, a0, a1, a2, a3);
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}
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static inline void audit_syscall_exit(void *pt_regs)
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{
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if (unlikely(current->audit_context)) {
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if (unlikely(audit_context())) {
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int success = is_syscall_success(pt_regs);
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long return_code = regs_return_value(pt_regs);
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@ -302,12 +314,6 @@ static inline void audit_inode_child(struct inode *parent,
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}
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void audit_core_dumps(long signr);
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static inline void audit_seccomp(unsigned long syscall, long signr, int code)
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{
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if (audit_enabled && unlikely(!audit_dummy_context()))
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__audit_seccomp(syscall, signr, code);
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}
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static inline void audit_ptrace(struct task_struct *t)
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{
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if (unlikely(!audit_dummy_context()))
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@ -468,6 +474,12 @@ static inline bool audit_dummy_context(void)
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{
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return true;
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}
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static inline void audit_set_context(struct task_struct *task, struct audit_context *ctx)
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{ }
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static inline struct audit_context *audit_context(void)
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{
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return NULL;
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}
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static inline struct filename *audit_reusename(const __user char *name)
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{
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return NULL;
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@ -498,10 +510,11 @@ static inline void audit_inode_child(struct inode *parent,
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{ }
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static inline void audit_core_dumps(long signr)
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{ }
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static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
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{ }
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static inline void audit_seccomp(unsigned long syscall, long signr, int code)
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{ }
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static inline void audit_seccomp_actions_logged(const char *names,
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const char *old_names, int res)
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{ }
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static inline int auditsc_get_stamp(struct audit_context *ctx,
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struct timespec64 *t, unsigned int *serial)
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{
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@ -513,7 +526,7 @@ static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
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}
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static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
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{
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return -1;
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return AUDIT_SID_UNSET;
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}
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static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
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{ }
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@ -737,7 +737,7 @@ static inline struct audit_buffer *xfrm_audit_start(const char *op)
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if (audit_enabled == 0)
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return NULL;
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audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
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audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
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AUDIT_MAC_IPSEC_EVENT);
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if (audit_buf == NULL)
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return NULL;
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@ -752,7 +752,7 @@ static inline void xfrm_audit_helper_usrinfo(bool task_valid,
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audit_get_loginuid(current) :
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INVALID_UID);
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const unsigned int ses = task_valid ? audit_get_sessionid(current) :
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(unsigned int) -1;
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AUDIT_SID_UNSET;
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audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
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audit_log_task_context(audit_buf);
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@ -465,6 +465,7 @@ struct audit_tty_status {
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};
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#define AUDIT_UID_UNSET (unsigned int)-1
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#define AUDIT_SID_UNSET ((unsigned int)-1)
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/* audit_rule_data supports filter rules with both integer and string
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* fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
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@ -9,6 +9,7 @@
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/audit.h>
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#include <asm/pgtable.h>
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#include <linux/uaccess.h>
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@ -119,7 +120,7 @@ struct task_struct init_task
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.thread_node = LIST_HEAD_INIT(init_signals.thread_head),
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#ifdef CONFIG_AUDITSYSCALL
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.loginuid = INVALID_UID,
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.sessionid = (unsigned int)-1,
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.sessionid = AUDIT_SID_UNSET,
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#endif
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#ifdef CONFIG_PERF_EVENTS
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.perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),
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@ -1099,8 +1099,7 @@ static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature
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if (audit_enabled == AUDIT_OFF)
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return;
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ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE);
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ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_FEATURE_CHANGE);
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if (!ab)
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return;
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audit_log_task_info(ab, current);
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@ -2317,8 +2316,7 @@ void audit_log_link_denied(const char *operation)
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return;
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/* Generate AUDIT_ANOM_LINK with subject, operation, outcome. */
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ab = audit_log_start(current->audit_context, GFP_KERNEL,
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AUDIT_ANOM_LINK);
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ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_ANOM_LINK);
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if (!ab)
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return;
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audit_log_format(ab, "op=%s", operation);
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@ -274,7 +274,7 @@ static void audit_update_watch(struct audit_parent *parent,
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/* If the update involves invalidating rules, do the inode-based
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* filtering now, so we don't omit records. */
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if (invalidating && !audit_dummy_context())
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audit_filter_inodes(current, current->audit_context);
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audit_filter_inodes(current, audit_context());
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/* updating ino will likely change which audit_hash_list we
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* are on so we need a new watch for the new list */
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@ -426,7 +426,7 @@ static int audit_field_valid(struct audit_entry *entry, struct audit_field *f)
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return -EINVAL;
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break;
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case AUDIT_EXE:
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if (f->op != Audit_equal)
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if (f->op != Audit_not_equal && f->op != Audit_equal)
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return -EINVAL;
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if (entry->rule.listnr != AUDIT_FILTER_EXIT)
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return -EINVAL;
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@ -1089,8 +1089,6 @@ static void audit_list_rules(int seq, struct sk_buff_head *q)
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static void audit_log_rule_change(char *action, struct audit_krule *rule, int res)
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{
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struct audit_buffer *ab;
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uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(current));
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unsigned int sessionid = audit_get_sessionid(current);
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if (!audit_enabled)
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return;
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@ -1098,7 +1096,7 @@ static void audit_log_rule_change(char *action, struct audit_krule *rule, int re
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ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
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if (!ab)
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return;
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audit_log_format(ab, "auid=%u ses=%u" ,loginuid, sessionid);
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audit_log_session_info(ab);
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audit_log_task_context(ab);
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audit_log_format(ab, " op=%s", action);
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audit_log_key(ab, rule->filterkey);
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135
kernel/auditsc.c
135
kernel/auditsc.c
@ -374,7 +374,7 @@ static int audit_field_compare(struct task_struct *tsk,
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case AUDIT_COMPARE_EGID_TO_OBJ_GID:
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return audit_compare_gid(cred->egid, name, f, ctx);
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case AUDIT_COMPARE_AUID_TO_OBJ_UID:
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return audit_compare_uid(tsk->loginuid, name, f, ctx);
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return audit_compare_uid(audit_get_loginuid(tsk), name, f, ctx);
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case AUDIT_COMPARE_SUID_TO_OBJ_UID:
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return audit_compare_uid(cred->suid, name, f, ctx);
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case AUDIT_COMPARE_SGID_TO_OBJ_GID:
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@ -385,7 +385,8 @@ static int audit_field_compare(struct task_struct *tsk,
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return audit_compare_gid(cred->fsgid, name, f, ctx);
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/* uid comparisons */
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case AUDIT_COMPARE_UID_TO_AUID:
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return audit_uid_comparator(cred->uid, f->op, tsk->loginuid);
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return audit_uid_comparator(cred->uid, f->op,
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audit_get_loginuid(tsk));
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case AUDIT_COMPARE_UID_TO_EUID:
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return audit_uid_comparator(cred->uid, f->op, cred->euid);
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case AUDIT_COMPARE_UID_TO_SUID:
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@ -394,11 +395,14 @@ static int audit_field_compare(struct task_struct *tsk,
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return audit_uid_comparator(cred->uid, f->op, cred->fsuid);
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/* auid comparisons */
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case AUDIT_COMPARE_AUID_TO_EUID:
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return audit_uid_comparator(tsk->loginuid, f->op, cred->euid);
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return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
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cred->euid);
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case AUDIT_COMPARE_AUID_TO_SUID:
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return audit_uid_comparator(tsk->loginuid, f->op, cred->suid);
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return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
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cred->suid);
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case AUDIT_COMPARE_AUID_TO_FSUID:
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return audit_uid_comparator(tsk->loginuid, f->op, cred->fsuid);
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return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
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cred->fsuid);
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/* euid comparisons */
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case AUDIT_COMPARE_EUID_TO_SUID:
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return audit_uid_comparator(cred->euid, f->op, cred->suid);
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@ -471,6 +475,8 @@ static int audit_filter_rules(struct task_struct *tsk,
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break;
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case AUDIT_EXE:
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result = audit_exe_compare(tsk, rule->exe);
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if (f->op == Audit_not_equal)
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result = !result;
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break;
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case AUDIT_UID:
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result = audit_uid_comparator(cred->uid, f->op, f->uid);
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@ -511,7 +517,7 @@ static int audit_filter_rules(struct task_struct *tsk,
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result = audit_gid_comparator(cred->fsgid, f->op, f->gid);
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break;
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case AUDIT_SESSIONID:
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sessionid = audit_get_sessionid(current);
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sessionid = audit_get_sessionid(tsk);
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result = audit_comparator(sessionid, f->op, f->val);
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break;
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case AUDIT_PERS:
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@ -609,7 +615,8 @@ static int audit_filter_rules(struct task_struct *tsk,
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result = match_tree_refs(ctx, rule->tree);
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break;
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case AUDIT_LOGINUID:
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result = audit_uid_comparator(tsk->loginuid, f->op, f->uid);
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result = audit_uid_comparator(audit_get_loginuid(tsk),
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f->op, f->uid);
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break;
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case AUDIT_LOGINUID_SET:
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result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val);
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@ -863,7 +870,7 @@ static inline struct audit_context *audit_take_context(struct task_struct *tsk,
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audit_filter_inodes(tsk, context);
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}
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tsk->audit_context = NULL;
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audit_set_context(tsk, NULL);
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return context;
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}
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@ -950,7 +957,7 @@ int audit_alloc(struct task_struct *tsk)
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}
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context->filterkey = key;
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tsk->audit_context = context;
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audit_set_context(tsk, context);
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set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
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return 0;
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}
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@ -1507,8 +1514,7 @@ void __audit_free(struct task_struct *tsk)
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void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
|
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unsigned long a3, unsigned long a4)
|
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{
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struct task_struct *tsk = current;
|
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struct audit_context *context = tsk->audit_context;
|
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struct audit_context *context = audit_context();
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enum audit_state state;
|
||||
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||||
if (!audit_enabled || !context)
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@ -1523,7 +1529,7 @@ void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
|
||||
context->dummy = !audit_n_rules;
|
||||
if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
|
||||
context->prio = 0;
|
||||
if (auditd_test_task(tsk))
|
||||
if (auditd_test_task(current))
|
||||
return;
|
||||
}
|
||||
|
||||
@ -1553,7 +1559,6 @@ void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
|
||||
*/
|
||||
void __audit_syscall_exit(int success, long return_code)
|
||||
{
|
||||
struct task_struct *tsk = current;
|
||||
struct audit_context *context;
|
||||
|
||||
if (success)
|
||||
@ -1561,12 +1566,12 @@ void __audit_syscall_exit(int success, long return_code)
|
||||
else
|
||||
success = AUDITSC_FAILURE;
|
||||
|
||||
context = audit_take_context(tsk, success, return_code);
|
||||
context = audit_take_context(current, success, return_code);
|
||||
if (!context)
|
||||
return;
|
||||
|
||||
if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
|
||||
audit_log_exit(context, tsk);
|
||||
audit_log_exit(context, current);
|
||||
|
||||
context->in_syscall = 0;
|
||||
context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
|
||||
@ -1588,7 +1593,7 @@ void __audit_syscall_exit(int success, long return_code)
|
||||
kfree(context->filterkey);
|
||||
context->filterkey = NULL;
|
||||
}
|
||||
tsk->audit_context = context;
|
||||
audit_set_context(current, context);
|
||||
}
|
||||
|
||||
static inline void handle_one(const struct inode *inode)
|
||||
@ -1600,7 +1605,7 @@ static inline void handle_one(const struct inode *inode)
|
||||
int count;
|
||||
if (likely(!inode->i_fsnotify_marks))
|
||||
return;
|
||||
context = current->audit_context;
|
||||
context = audit_context();
|
||||
p = context->trees;
|
||||
count = context->tree_count;
|
||||
rcu_read_lock();
|
||||
@ -1631,7 +1636,7 @@ static void handle_path(const struct dentry *dentry)
|
||||
unsigned long seq;
|
||||
int count;
|
||||
|
||||
context = current->audit_context;
|
||||
context = audit_context();
|
||||
p = context->trees;
|
||||
count = context->tree_count;
|
||||
retry:
|
||||
@ -1713,7 +1718,7 @@ static struct audit_names *audit_alloc_name(struct audit_context *context,
|
||||
struct filename *
|
||||
__audit_reusename(const __user char *uptr)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
struct audit_names *n;
|
||||
|
||||
list_for_each_entry(n, &context->names_list, list) {
|
||||
@ -1736,7 +1741,7 @@ __audit_reusename(const __user char *uptr)
|
||||
*/
|
||||
void __audit_getname(struct filename *name)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
struct audit_names *n;
|
||||
|
||||
if (!context->in_syscall)
|
||||
@ -1764,7 +1769,7 @@ void __audit_getname(struct filename *name)
|
||||
void __audit_inode(struct filename *name, const struct dentry *dentry,
|
||||
unsigned int flags)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
struct inode *inode = d_backing_inode(dentry);
|
||||
struct audit_names *n;
|
||||
bool parent = flags & AUDIT_INODE_PARENT;
|
||||
@ -1863,7 +1868,7 @@ void __audit_inode_child(struct inode *parent,
|
||||
const struct dentry *dentry,
|
||||
const unsigned char type)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
struct inode *inode = d_backing_inode(dentry);
|
||||
const char *dname = dentry->d_name.name;
|
||||
struct audit_names *n, *found_parent = NULL, *found_child = NULL;
|
||||
@ -2048,7 +2053,7 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid,
|
||||
int audit_set_loginuid(kuid_t loginuid)
|
||||
{
|
||||
struct task_struct *task = current;
|
||||
unsigned int oldsessionid, sessionid = (unsigned int)-1;
|
||||
unsigned int oldsessionid, sessionid = AUDIT_SID_UNSET;
|
||||
kuid_t oldloginuid;
|
||||
int rc;
|
||||
|
||||
@ -2062,7 +2067,7 @@ int audit_set_loginuid(kuid_t loginuid)
|
||||
/* are we setting or clearing? */
|
||||
if (uid_valid(loginuid)) {
|
||||
sessionid = (unsigned int)atomic_inc_return(&session_id);
|
||||
if (unlikely(sessionid == (unsigned int)-1))
|
||||
if (unlikely(sessionid == AUDIT_SID_UNSET))
|
||||
sessionid = (unsigned int)atomic_inc_return(&session_id);
|
||||
}
|
||||
|
||||
@ -2082,7 +2087,7 @@ out:
|
||||
*/
|
||||
void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
if (attr)
|
||||
memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
|
||||
@ -2106,7 +2111,7 @@ void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
|
||||
void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
|
||||
const struct timespec64 *abs_timeout)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
struct timespec64 *p = &context->mq_sendrecv.abs_timeout;
|
||||
|
||||
if (abs_timeout)
|
||||
@ -2130,7 +2135,7 @@ void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
|
||||
|
||||
void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
if (notification)
|
||||
context->mq_notify.sigev_signo = notification->sigev_signo;
|
||||
@ -2149,7 +2154,7 @@ void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
|
||||
*/
|
||||
void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
context->mq_getsetattr.mqdes = mqdes;
|
||||
context->mq_getsetattr.mqstat = *mqstat;
|
||||
context->type = AUDIT_MQ_GETSETATTR;
|
||||
@ -2162,7 +2167,7 @@ void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
|
||||
*/
|
||||
void __audit_ipc_obj(struct kern_ipc_perm *ipcp)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
context->ipc.uid = ipcp->uid;
|
||||
context->ipc.gid = ipcp->gid;
|
||||
context->ipc.mode = ipcp->mode;
|
||||
@ -2182,7 +2187,7 @@ void __audit_ipc_obj(struct kern_ipc_perm *ipcp)
|
||||
*/
|
||||
void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
context->ipc.qbytes = qbytes;
|
||||
context->ipc.perm_uid = uid;
|
||||
@ -2193,7 +2198,7 @@ void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mo
|
||||
|
||||
void __audit_bprm(struct linux_binprm *bprm)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
context->type = AUDIT_EXECVE;
|
||||
context->execve.argc = bprm->argc;
|
||||
@ -2208,7 +2213,7 @@ void __audit_bprm(struct linux_binprm *bprm)
|
||||
*/
|
||||
int __audit_socketcall(int nargs, unsigned long *args)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
if (nargs <= 0 || nargs > AUDITSC_ARGS || !args)
|
||||
return -EINVAL;
|
||||
@ -2226,7 +2231,7 @@ int __audit_socketcall(int nargs, unsigned long *args)
|
||||
*/
|
||||
void __audit_fd_pair(int fd1, int fd2)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
context->fds[0] = fd1;
|
||||
context->fds[1] = fd2;
|
||||
}
|
||||
@ -2240,7 +2245,7 @@ void __audit_fd_pair(int fd1, int fd2)
|
||||
*/
|
||||
int __audit_sockaddr(int len, void *a)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
if (!context->sockaddr) {
|
||||
void *p = kmalloc(sizeof(struct sockaddr_storage), GFP_KERNEL);
|
||||
@ -2256,7 +2261,7 @@ int __audit_sockaddr(int len, void *a)
|
||||
|
||||
void __audit_ptrace(struct task_struct *t)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
context->target_pid = task_tgid_nr(t);
|
||||
context->target_auid = audit_get_loginuid(t);
|
||||
@ -2277,19 +2282,19 @@ void __audit_ptrace(struct task_struct *t)
|
||||
int audit_signal_info(int sig, struct task_struct *t)
|
||||
{
|
||||
struct audit_aux_data_pids *axp;
|
||||
struct task_struct *tsk = current;
|
||||
struct audit_context *ctx = tsk->audit_context;
|
||||
kuid_t uid = current_uid(), t_uid = task_uid(t);
|
||||
struct audit_context *ctx = audit_context();
|
||||
kuid_t uid = current_uid(), auid, t_uid = task_uid(t);
|
||||
|
||||
if (auditd_test_task(t) &&
|
||||
(sig == SIGTERM || sig == SIGHUP ||
|
||||
sig == SIGUSR1 || sig == SIGUSR2)) {
|
||||
audit_sig_pid = task_tgid_nr(tsk);
|
||||
if (uid_valid(tsk->loginuid))
|
||||
audit_sig_uid = tsk->loginuid;
|
||||
audit_sig_pid = task_tgid_nr(current);
|
||||
auid = audit_get_loginuid(current);
|
||||
if (uid_valid(auid))
|
||||
audit_sig_uid = auid;
|
||||
else
|
||||
audit_sig_uid = uid;
|
||||
security_task_getsecid(tsk, &audit_sig_sid);
|
||||
security_task_getsecid(current, &audit_sig_sid);
|
||||
}
|
||||
|
||||
if (!audit_signals || audit_dummy_context())
|
||||
@ -2345,7 +2350,7 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
|
||||
const struct cred *new, const struct cred *old)
|
||||
{
|
||||
struct audit_aux_data_bprm_fcaps *ax;
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
struct cpu_vfs_cap_data vcaps;
|
||||
|
||||
ax = kmalloc(sizeof(*ax), GFP_KERNEL);
|
||||
@ -2385,7 +2390,7 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
|
||||
*/
|
||||
void __audit_log_capset(const struct cred *new, const struct cred *old)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
context->capset.pid = task_tgid_nr(current);
|
||||
context->capset.cap.effective = new->cap_effective;
|
||||
context->capset.cap.inheritable = new->cap_effective;
|
||||
@ -2396,7 +2401,7 @@ void __audit_log_capset(const struct cred *new, const struct cred *old)
|
||||
|
||||
void __audit_mmap_fd(int fd, int flags)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
context->mmap.fd = fd;
|
||||
context->mmap.flags = flags;
|
||||
context->type = AUDIT_MMAP;
|
||||
@ -2404,7 +2409,7 @@ void __audit_mmap_fd(int fd, int flags)
|
||||
|
||||
void __audit_log_kern_module(char *name)
|
||||
{
|
||||
struct audit_context *context = current->audit_context;
|
||||
struct audit_context *context = audit_context();
|
||||
|
||||
context->module.name = kmalloc(strlen(name) + 1, GFP_KERNEL);
|
||||
strcpy(context->module.name, name);
|
||||
@ -2413,7 +2418,7 @@ void __audit_log_kern_module(char *name)
|
||||
|
||||
void __audit_fanotify(unsigned int response)
|
||||
{
|
||||
audit_log(current->audit_context, GFP_KERNEL,
|
||||
audit_log(audit_context(), GFP_KERNEL,
|
||||
AUDIT_FANOTIFY, "resp=%u", response);
|
||||
}
|
||||
|
||||
@ -2464,7 +2469,19 @@ void audit_core_dumps(long signr)
|
||||
audit_log_end(ab);
|
||||
}
|
||||
|
||||
void __audit_seccomp(unsigned long syscall, long signr, int code)
|
||||
/**
|
||||
* audit_seccomp - record information about a seccomp action
|
||||
* @syscall: syscall number
|
||||
* @signr: signal value
|
||||
* @code: the seccomp action
|
||||
*
|
||||
* Record the information associated with a seccomp action. Event filtering for
|
||||
* seccomp actions that are not to be logged is done in seccomp_log().
|
||||
* Therefore, this function forces auditing independent of the audit_enabled
|
||||
* and dummy context state because seccomp actions should be logged even when
|
||||
* audit is not in use.
|
||||
*/
|
||||
void audit_seccomp(unsigned long syscall, long signr, int code)
|
||||
{
|
||||
struct audit_buffer *ab;
|
||||
|
||||
@ -2478,9 +2495,29 @@ void __audit_seccomp(unsigned long syscall, long signr, int code)
|
||||
audit_log_end(ab);
|
||||
}
|
||||
|
||||
void audit_seccomp_actions_logged(const char *names, const char *old_names,
|
||||
int res)
|
||||
{
|
||||
struct audit_buffer *ab;
|
||||
|
||||
if (!audit_enabled)
|
||||
return;
|
||||
|
||||
ab = audit_log_start(audit_context(), GFP_KERNEL,
|
||||
AUDIT_CONFIG_CHANGE);
|
||||
if (unlikely(!ab))
|
||||
return;
|
||||
|
||||
audit_log_format(ab, "op=seccomp-logging");
|
||||
audit_log_format(ab, " actions=%s", names);
|
||||
audit_log_format(ab, " old-actions=%s", old_names);
|
||||
audit_log_format(ab, " res=%d", res);
|
||||
audit_log_end(ab);
|
||||
}
|
||||
|
||||
struct list_head *audit_killed_trees(void)
|
||||
{
|
||||
struct audit_context *ctx = current->audit_context;
|
||||
struct audit_context *ctx = audit_context();
|
||||
if (likely(!ctx || !ctx->in_syscall))
|
||||
return NULL;
|
||||
return &ctx->killed_trees;
|
||||
|
||||
@ -1712,7 +1712,7 @@ static __latent_entropy struct task_struct *copy_process(
|
||||
p->start_time = ktime_get_ns();
|
||||
p->real_start_time = ktime_get_boot_ns();
|
||||
p->io_context = NULL;
|
||||
p->audit_context = NULL;
|
||||
audit_set_context(p, NULL);
|
||||
cgroup_fork(p);
|
||||
#ifdef CONFIG_NUMA
|
||||
p->mempolicy = mpol_dup(p->mempolicy);
|
||||
|
||||
128
kernel/seccomp.c
128
kernel/seccomp.c
@ -593,18 +593,15 @@ static inline void seccomp_log(unsigned long syscall, long signr, u32 action,
|
||||
}
|
||||
|
||||
/*
|
||||
* Force an audit message to be emitted when the action is RET_KILL_*,
|
||||
* RET_LOG, or the FILTER_FLAG_LOG bit was set and the action is
|
||||
* allowed to be logged by the admin.
|
||||
* Emit an audit message when the action is RET_KILL_*, RET_LOG, or the
|
||||
* FILTER_FLAG_LOG bit was set. The admin has the ability to silence
|
||||
* any action from being logged by removing the action name from the
|
||||
* seccomp_actions_logged sysctl.
|
||||
*/
|
||||
if (log)
|
||||
return __audit_seccomp(syscall, signr, action);
|
||||
if (!log)
|
||||
return;
|
||||
|
||||
/*
|
||||
* Let the audit subsystem decide if the action should be audited based
|
||||
* on whether the current task itself is being audited.
|
||||
*/
|
||||
return audit_seccomp(syscall, signr, action);
|
||||
audit_seccomp(syscall, signr, action);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -1144,10 +1141,11 @@ static const struct seccomp_log_name seccomp_log_names[] = {
|
||||
};
|
||||
|
||||
static bool seccomp_names_from_actions_logged(char *names, size_t size,
|
||||
u32 actions_logged)
|
||||
u32 actions_logged,
|
||||
const char *sep)
|
||||
{
|
||||
const struct seccomp_log_name *cur;
|
||||
bool append_space = false;
|
||||
bool append_sep = false;
|
||||
|
||||
for (cur = seccomp_log_names; cur->name && size; cur++) {
|
||||
ssize_t ret;
|
||||
@ -1155,15 +1153,15 @@ static bool seccomp_names_from_actions_logged(char *names, size_t size,
|
||||
if (!(actions_logged & cur->log))
|
||||
continue;
|
||||
|
||||
if (append_space) {
|
||||
ret = strscpy(names, " ", size);
|
||||
if (append_sep) {
|
||||
ret = strscpy(names, sep, size);
|
||||
if (ret < 0)
|
||||
return false;
|
||||
|
||||
names += ret;
|
||||
size -= ret;
|
||||
} else
|
||||
append_space = true;
|
||||
append_sep = true;
|
||||
|
||||
ret = strscpy(names, cur->name, size);
|
||||
if (ret < 0)
|
||||
@ -1208,48 +1206,104 @@ static bool seccomp_actions_logged_from_names(u32 *actions_logged, char *names)
|
||||
return true;
|
||||
}
|
||||
|
||||
static int seccomp_actions_logged_handler(struct ctl_table *ro_table, int write,
|
||||
void __user *buffer, size_t *lenp,
|
||||
loff_t *ppos)
|
||||
static int read_actions_logged(struct ctl_table *ro_table, void __user *buffer,
|
||||
size_t *lenp, loff_t *ppos)
|
||||
{
|
||||
char names[sizeof(seccomp_actions_avail)];
|
||||
struct ctl_table table;
|
||||
|
||||
memset(names, 0, sizeof(names));
|
||||
|
||||
if (!seccomp_names_from_actions_logged(names, sizeof(names),
|
||||
seccomp_actions_logged, " "))
|
||||
return -EINVAL;
|
||||
|
||||
table = *ro_table;
|
||||
table.data = names;
|
||||
table.maxlen = sizeof(names);
|
||||
return proc_dostring(&table, 0, buffer, lenp, ppos);
|
||||
}
|
||||
|
||||
static int write_actions_logged(struct ctl_table *ro_table, void __user *buffer,
|
||||
size_t *lenp, loff_t *ppos, u32 *actions_logged)
|
||||
{
|
||||
char names[sizeof(seccomp_actions_avail)];
|
||||
struct ctl_table table;
|
||||
int ret;
|
||||
|
||||
if (write && !capable(CAP_SYS_ADMIN))
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EPERM;
|
||||
|
||||
memset(names, 0, sizeof(names));
|
||||
|
||||
if (!write) {
|
||||
if (!seccomp_names_from_actions_logged(names, sizeof(names),
|
||||
seccomp_actions_logged))
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
table = *ro_table;
|
||||
table.data = names;
|
||||
table.maxlen = sizeof(names);
|
||||
ret = proc_dostring(&table, write, buffer, lenp, ppos);
|
||||
ret = proc_dostring(&table, 1, buffer, lenp, ppos);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (write) {
|
||||
u32 actions_logged;
|
||||
if (!seccomp_actions_logged_from_names(actions_logged, table.data))
|
||||
return -EINVAL;
|
||||
|
||||
if (!seccomp_actions_logged_from_names(&actions_logged,
|
||||
table.data))
|
||||
return -EINVAL;
|
||||
|
||||
if (actions_logged & SECCOMP_LOG_ALLOW)
|
||||
return -EINVAL;
|
||||
|
||||
seccomp_actions_logged = actions_logged;
|
||||
}
|
||||
if (*actions_logged & SECCOMP_LOG_ALLOW)
|
||||
return -EINVAL;
|
||||
|
||||
seccomp_actions_logged = *actions_logged;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void audit_actions_logged(u32 actions_logged, u32 old_actions_logged,
|
||||
int ret)
|
||||
{
|
||||
char names[sizeof(seccomp_actions_avail)];
|
||||
char old_names[sizeof(seccomp_actions_avail)];
|
||||
const char *new = names;
|
||||
const char *old = old_names;
|
||||
|
||||
if (!audit_enabled)
|
||||
return;
|
||||
|
||||
memset(names, 0, sizeof(names));
|
||||
memset(old_names, 0, sizeof(old_names));
|
||||
|
||||
if (ret)
|
||||
new = "?";
|
||||
else if (!actions_logged)
|
||||
new = "(none)";
|
||||
else if (!seccomp_names_from_actions_logged(names, sizeof(names),
|
||||
actions_logged, ","))
|
||||
new = "?";
|
||||
|
||||
if (!old_actions_logged)
|
||||
old = "(none)";
|
||||
else if (!seccomp_names_from_actions_logged(old_names,
|
||||
sizeof(old_names),
|
||||
old_actions_logged, ","))
|
||||
old = "?";
|
||||
|
||||
return audit_seccomp_actions_logged(new, old, !ret);
|
||||
}
|
||||
|
||||
static int seccomp_actions_logged_handler(struct ctl_table *ro_table, int write,
|
||||
void __user *buffer, size_t *lenp,
|
||||
loff_t *ppos)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (write) {
|
||||
u32 actions_logged = 0;
|
||||
u32 old_actions_logged = seccomp_actions_logged;
|
||||
|
||||
ret = write_actions_logged(ro_table, buffer, lenp, ppos,
|
||||
&actions_logged);
|
||||
audit_actions_logged(actions_logged, old_actions_logged, ret);
|
||||
} else
|
||||
ret = read_actions_logged(ro_table, buffer, lenp, ppos);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct ctl_path seccomp_sysctl_path[] = {
|
||||
{ .procname = "kernel", },
|
||||
{ .procname = "seccomp", },
|
||||
|
||||
@ -1062,7 +1062,7 @@ static int do_replace_finish(struct net *net, struct ebt_replace *repl,
|
||||
|
||||
#ifdef CONFIG_AUDIT
|
||||
if (audit_enabled) {
|
||||
audit_log(current->audit_context, GFP_KERNEL,
|
||||
audit_log(audit_context(), GFP_KERNEL,
|
||||
AUDIT_NETFILTER_CFG,
|
||||
"table=%s family=%u entries=%u",
|
||||
repl->name, AF_BRIDGE, repl->nentries);
|
||||
|
||||
@ -6731,15 +6731,15 @@ static int __dev_set_promiscuity(struct net_device *dev, int inc, bool notify)
|
||||
dev->flags & IFF_PROMISC ? "entered" : "left");
|
||||
if (audit_enabled) {
|
||||
current_uid_gid(&uid, &gid);
|
||||
audit_log(current->audit_context, GFP_ATOMIC,
|
||||
AUDIT_ANOM_PROMISCUOUS,
|
||||
"dev=%s prom=%d old_prom=%d auid=%u uid=%u gid=%u ses=%u",
|
||||
dev->name, (dev->flags & IFF_PROMISC),
|
||||
(old_flags & IFF_PROMISC),
|
||||
from_kuid(&init_user_ns, audit_get_loginuid(current)),
|
||||
from_kuid(&init_user_ns, uid),
|
||||
from_kgid(&init_user_ns, gid),
|
||||
audit_get_sessionid(current));
|
||||
audit_log(audit_context(), GFP_ATOMIC,
|
||||
AUDIT_ANOM_PROMISCUOUS,
|
||||
"dev=%s prom=%d old_prom=%d auid=%u uid=%u gid=%u ses=%u",
|
||||
dev->name, (dev->flags & IFF_PROMISC),
|
||||
(old_flags & IFF_PROMISC),
|
||||
from_kuid(&init_user_ns, audit_get_loginuid(current)),
|
||||
from_kuid(&init_user_ns, uid),
|
||||
from_kgid(&init_user_ns, gid),
|
||||
audit_get_sessionid(current));
|
||||
}
|
||||
|
||||
dev_change_rx_flags(dev, IFF_PROMISC);
|
||||
|
||||
@ -1420,7 +1420,7 @@ xt_replace_table(struct xt_table *table,
|
||||
|
||||
#ifdef CONFIG_AUDIT
|
||||
if (audit_enabled) {
|
||||
audit_log(current->audit_context, GFP_KERNEL,
|
||||
audit_log(audit_context(), GFP_KERNEL,
|
||||
AUDIT_NETFILTER_CFG,
|
||||
"table=%s family=%u entries=%u",
|
||||
table->name, table->af, private->number);
|
||||
|
||||
@ -104,7 +104,7 @@ struct audit_buffer *netlbl_audit_start_common(int type,
|
||||
if (audit_enabled == 0)
|
||||
return NULL;
|
||||
|
||||
audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type);
|
||||
audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, type);
|
||||
if (audit_buf == NULL)
|
||||
return NULL;
|
||||
|
||||
|
||||
@ -326,7 +326,7 @@ void ima_audit_measurement(struct integrity_iint_cache *iint,
|
||||
hex_byte_pack(hash + (i * 2), iint->ima_hash->digest[i]);
|
||||
hash[i * 2] = '\0';
|
||||
|
||||
ab = audit_log_start(current->audit_context, GFP_KERNEL,
|
||||
ab = audit_log_start(audit_context(), GFP_KERNEL,
|
||||
AUDIT_INTEGRITY_RULE);
|
||||
if (!ab)
|
||||
goto out;
|
||||
|
||||
@ -38,7 +38,7 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
|
||||
if (!integrity_audit_info && audit_info == 1) /* Skip info messages */
|
||||
return;
|
||||
|
||||
ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
|
||||
ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
|
||||
audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
|
||||
task_pid_nr(current),
|
||||
from_kuid(&init_user_ns, current_cred()->uid),
|
||||
|
||||
@ -447,7 +447,7 @@ void common_lsm_audit(struct common_audit_data *a,
|
||||
if (a == NULL)
|
||||
return;
|
||||
/* we use GFP_ATOMIC so we won't sleep */
|
||||
ab = audit_log_start(current->audit_context, GFP_ATOMIC | __GFP_NOWARN,
|
||||
ab = audit_log_start(audit_context(), GFP_ATOMIC | __GFP_NOWARN,
|
||||
AUDIT_AVC);
|
||||
|
||||
if (ab == NULL)
|
||||
|
||||
@ -3305,7 +3305,8 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
|
||||
} else {
|
||||
audit_size = 0;
|
||||
}
|
||||
ab = audit_log_start(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR);
|
||||
ab = audit_log_start(audit_context(),
|
||||
GFP_ATOMIC, AUDIT_SELINUX_ERR);
|
||||
audit_log_format(ab, "op=setxattr invalid_context=");
|
||||
audit_log_n_untrustedstring(ab, value, audit_size);
|
||||
audit_log_end(ab);
|
||||
@ -6460,7 +6461,9 @@ static int selinux_setprocattr(const char *name, void *value, size_t size)
|
||||
audit_size = size - 1;
|
||||
else
|
||||
audit_size = size;
|
||||
ab = audit_log_start(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR);
|
||||
ab = audit_log_start(audit_context(),
|
||||
GFP_ATOMIC,
|
||||
AUDIT_SELINUX_ERR);
|
||||
audit_log_format(ab, "op=fscreate invalid_context=");
|
||||
audit_log_n_untrustedstring(ab, value, audit_size);
|
||||
audit_log_end(ab);
|
||||
|
||||
@ -167,7 +167,7 @@ static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
|
||||
NULL);
|
||||
if (length)
|
||||
goto out;
|
||||
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
|
||||
audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS,
|
||||
"enforcing=%d old_enforcing=%d auid=%u ses=%u"
|
||||
" enabled=%d old-enabled=%d lsm=selinux res=1",
|
||||
new_value, old_value,
|
||||
@ -303,7 +303,7 @@ static ssize_t sel_write_disable(struct file *file, const char __user *buf,
|
||||
length = selinux_disable(fsi->state);
|
||||
if (length)
|
||||
goto out;
|
||||
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
|
||||
audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS,
|
||||
"enforcing=%d old_enforcing=%d auid=%u ses=%u"
|
||||
" enabled=%d old-enabled=%d lsm=selinux res=1",
|
||||
enforcing, enforcing,
|
||||
@ -581,7 +581,7 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
|
||||
length = count;
|
||||
|
||||
out1:
|
||||
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
|
||||
audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
|
||||
"auid=%u ses=%u lsm=selinux res=1",
|
||||
from_kuid(&init_user_ns, audit_get_loginuid(current)),
|
||||
audit_get_sessionid(current));
|
||||
|
||||
@ -501,7 +501,7 @@ static void security_dump_masked_av(struct policydb *policydb,
|
||||
goto out;
|
||||
|
||||
/* audit a message */
|
||||
ab = audit_log_start(current->audit_context,
|
||||
ab = audit_log_start(audit_context(),
|
||||
GFP_ATOMIC, AUDIT_SELINUX_ERR);
|
||||
if (!ab)
|
||||
goto out;
|
||||
@ -743,7 +743,7 @@ static int security_validtrans_handle_fail(struct selinux_state *state,
|
||||
goto out;
|
||||
if (context_struct_to_string(p, tcontext, &t, &tlen))
|
||||
goto out;
|
||||
audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
|
||||
audit_log(audit_context(), GFP_ATOMIC, AUDIT_SELINUX_ERR,
|
||||
"op=security_validate_transition seresult=denied"
|
||||
" oldcontext=%s newcontext=%s taskcontext=%s tclass=%s",
|
||||
o, n, t, sym_name(p, SYM_CLASSES, tclass-1));
|
||||
@ -929,7 +929,7 @@ int security_bounded_transition(struct selinux_state *state,
|
||||
&old_name, &length) &&
|
||||
!context_struct_to_string(policydb, new_context,
|
||||
&new_name, &length)) {
|
||||
audit_log(current->audit_context,
|
||||
audit_log(audit_context(),
|
||||
GFP_ATOMIC, AUDIT_SELINUX_ERR,
|
||||
"op=security_bounded_transition "
|
||||
"seresult=denied "
|
||||
@ -1586,7 +1586,7 @@ static int compute_sid_handle_invalid_context(
|
||||
goto out;
|
||||
if (context_struct_to_string(policydb, newcontext, &n, &nlen))
|
||||
goto out;
|
||||
audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
|
||||
audit_log(audit_context(), GFP_ATOMIC, AUDIT_SELINUX_ERR,
|
||||
"op=security_compute_sid invalid_context=%s"
|
||||
" scontext=%s"
|
||||
" tcontext=%s"
|
||||
@ -2882,7 +2882,7 @@ int security_set_bools(struct selinux_state *state, int len, int *values)
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
if (!!values[i] != policydb->bool_val_to_struct[i]->state) {
|
||||
audit_log(current->audit_context, GFP_ATOMIC,
|
||||
audit_log(audit_context(), GFP_ATOMIC,
|
||||
AUDIT_MAC_CONFIG_CHANGE,
|
||||
"bool=%s val=%d old_val=%d auid=%u ses=%u",
|
||||
sym_name(policydb, SYM_BOOLS, i),
|
||||
@ -3025,7 +3025,7 @@ int security_sid_mls_copy(struct selinux_state *state,
|
||||
if (rc) {
|
||||
if (!context_struct_to_string(policydb, &newcon, &s,
|
||||
&len)) {
|
||||
audit_log(current->audit_context,
|
||||
audit_log(audit_context(),
|
||||
GFP_ATOMIC, AUDIT_SELINUX_ERR,
|
||||
"op=security_sid_mls_copy "
|
||||
"invalid_context=%s", s);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user