audit: fix event coverage of AUDIT_ANOM_LINK
The userspace audit tools didn't like the existing formatting of the AUDIT_ANOM_LINK event. It needed to be expanded to emit an AUDIT_PATH event as well, so this implements the change. The bulk of the patch is moving code out of auditsc.c into audit.c and audit.h for general use. It expands audit_log_name to include an optional "struct path" argument for the simple case of just needing to report a pathname. This also makes audit_log_task_info available when syscall auditing is not enabled, since it is needed in either case for process details. Signed-off-by: Kees Cook <keescook@chromium.org> Reported-by: Steve Grubb <sgrubb@redhat.com>
This commit is contained in:
Eric Paris
Родитель
7173c54e3a
Коммит
b24a30a730
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@ -190,8 +190,6 @@ static inline int audit_get_sessionid(struct task_struct *tsk)
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return tsk->sessionid;
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}
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extern int audit_log_task_context(struct audit_buffer *ab);
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extern void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk);
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extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
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extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
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extern int __audit_bprm(struct linux_binprm *bprm);
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@ -346,13 +344,6 @@ static inline int audit_get_sessionid(struct task_struct *tsk)
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{
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return -1;
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}
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static int void audit_log_task_context(struct audit_buffer *ab)
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{
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return 0;
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}
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static inline void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk)
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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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static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
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@ -439,6 +430,10 @@ static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
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{ }
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#endif
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extern int audit_log_task_context(struct audit_buffer *ab);
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extern void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk);
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extern int audit_update_lsm_rules(void);
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/* Private API (for audit.c only) */
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@ -485,6 +480,13 @@ static inline void audit_log_link_denied(const char *string,
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{ }
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static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
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{ }
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static inline int audit_log_task_context(struct audit_buffer *ab)
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{
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return 0;
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}
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static inline void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk)
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{ }
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#define audit_enabled 0
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#endif /* CONFIG_AUDIT */
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static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
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244
kernel/audit.c
244
kernel/audit.c
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@ -50,6 +50,7 @@
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#include <linux/err.h>
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#include <linux/kthread.h>
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#include <linux/kernel.h>
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#include <linux/syscalls.h>
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#include <linux/audit.h>
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@ -1393,6 +1394,224 @@ void audit_log_key(struct audit_buffer *ab, char *key)
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audit_log_format(ab, "(null)");
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}
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void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
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{
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int i;
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audit_log_format(ab, " %s=", prefix);
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CAP_FOR_EACH_U32(i) {
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audit_log_format(ab, "%08x",
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cap->cap[(_KERNEL_CAPABILITY_U32S-1) - i]);
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}
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}
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void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
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{
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kernel_cap_t *perm = &name->fcap.permitted;
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kernel_cap_t *inh = &name->fcap.inheritable;
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int log = 0;
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if (!cap_isclear(*perm)) {
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audit_log_cap(ab, "cap_fp", perm);
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log = 1;
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}
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if (!cap_isclear(*inh)) {
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audit_log_cap(ab, "cap_fi", inh);
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log = 1;
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}
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if (log)
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audit_log_format(ab, " cap_fe=%d cap_fver=%x",
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name->fcap.fE, name->fcap_ver);
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}
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static inline int audit_copy_fcaps(struct audit_names *name,
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const struct dentry *dentry)
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{
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struct cpu_vfs_cap_data caps;
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int rc;
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if (!dentry)
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return 0;
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rc = get_vfs_caps_from_disk(dentry, &caps);
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if (rc)
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return rc;
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name->fcap.permitted = caps.permitted;
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name->fcap.inheritable = caps.inheritable;
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name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
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name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >>
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VFS_CAP_REVISION_SHIFT;
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return 0;
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}
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/* Copy inode data into an audit_names. */
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void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
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const struct inode *inode)
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{
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name->ino = inode->i_ino;
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name->dev = inode->i_sb->s_dev;
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name->mode = inode->i_mode;
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name->uid = inode->i_uid;
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name->gid = inode->i_gid;
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name->rdev = inode->i_rdev;
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security_inode_getsecid(inode, &name->osid);
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audit_copy_fcaps(name, dentry);
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}
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/**
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* audit_log_name - produce AUDIT_PATH record from struct audit_names
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* @context: audit_context for the task
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* @n: audit_names structure with reportable details
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* @path: optional path to report instead of audit_names->name
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* @record_num: record number to report when handling a list of names
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* @call_panic: optional pointer to int that will be updated if secid fails
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*/
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void audit_log_name(struct audit_context *context, struct audit_names *n,
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struct path *path, int record_num, int *call_panic)
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{
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struct audit_buffer *ab;
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ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
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if (!ab)
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return;
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audit_log_format(ab, "item=%d", record_num);
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if (path)
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audit_log_d_path(ab, " name=", path);
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else if (n->name) {
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switch (n->name_len) {
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case AUDIT_NAME_FULL:
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/* log the full path */
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audit_log_format(ab, " name=");
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audit_log_untrustedstring(ab, n->name->name);
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break;
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case 0:
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/* name was specified as a relative path and the
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* directory component is the cwd */
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audit_log_d_path(ab, " name=", &context->pwd);
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break;
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default:
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/* log the name's directory component */
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audit_log_format(ab, " name=");
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audit_log_n_untrustedstring(ab, n->name->name,
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n->name_len);
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}
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} else
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audit_log_format(ab, " name=(null)");
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if (n->ino != (unsigned long)-1) {
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audit_log_format(ab, " inode=%lu"
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" dev=%02x:%02x mode=%#ho"
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" ouid=%u ogid=%u rdev=%02x:%02x",
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n->ino,
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MAJOR(n->dev),
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MINOR(n->dev),
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n->mode,
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from_kuid(&init_user_ns, n->uid),
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from_kgid(&init_user_ns, n->gid),
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MAJOR(n->rdev),
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MINOR(n->rdev));
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}
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if (n->osid != 0) {
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char *ctx = NULL;
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u32 len;
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if (security_secid_to_secctx(
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n->osid, &ctx, &len)) {
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audit_log_format(ab, " osid=%u", n->osid);
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if (call_panic)
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*call_panic = 2;
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} else {
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audit_log_format(ab, " obj=%s", ctx);
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security_release_secctx(ctx, len);
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}
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}
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audit_log_fcaps(ab, n);
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audit_log_end(ab);
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}
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int audit_log_task_context(struct audit_buffer *ab)
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{
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char *ctx = NULL;
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unsigned len;
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int error;
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u32 sid;
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security_task_getsecid(current, &sid);
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if (!sid)
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return 0;
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error = security_secid_to_secctx(sid, &ctx, &len);
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if (error) {
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if (error != -EINVAL)
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goto error_path;
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return 0;
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}
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audit_log_format(ab, " subj=%s", ctx);
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security_release_secctx(ctx, len);
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return 0;
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error_path:
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audit_panic("error in audit_log_task_context");
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return error;
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}
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EXPORT_SYMBOL(audit_log_task_context);
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void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
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{
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const struct cred *cred;
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char name[sizeof(tsk->comm)];
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struct mm_struct *mm = tsk->mm;
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char *tty;
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if (!ab)
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return;
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/* tsk == current */
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cred = current_cred();
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spin_lock_irq(&tsk->sighand->siglock);
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if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
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tty = tsk->signal->tty->name;
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else
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tty = "(none)";
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spin_unlock_irq(&tsk->sighand->siglock);
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audit_log_format(ab,
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" ppid=%ld pid=%d auid=%u uid=%u gid=%u"
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" euid=%u suid=%u fsuid=%u"
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" egid=%u sgid=%u fsgid=%u ses=%u tty=%s",
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sys_getppid(),
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tsk->pid,
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from_kuid(&init_user_ns, audit_get_loginuid(tsk)),
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from_kuid(&init_user_ns, cred->uid),
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from_kgid(&init_user_ns, cred->gid),
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from_kuid(&init_user_ns, cred->euid),
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from_kuid(&init_user_ns, cred->suid),
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from_kuid(&init_user_ns, cred->fsuid),
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from_kgid(&init_user_ns, cred->egid),
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from_kgid(&init_user_ns, cred->sgid),
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from_kgid(&init_user_ns, cred->fsgid),
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audit_get_sessionid(tsk), tty);
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get_task_comm(name, tsk);
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audit_log_format(ab, " comm=");
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audit_log_untrustedstring(ab, name);
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if (mm) {
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down_read(&mm->mmap_sem);
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if (mm->exe_file)
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audit_log_d_path(ab, " exe=", &mm->exe_file->f_path);
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up_read(&mm->mmap_sem);
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}
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audit_log_task_context(ab);
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}
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EXPORT_SYMBOL(audit_log_task_info);
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/**
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* audit_log_link_denied - report a link restriction denial
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* @operation: specific link opreation
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@ -1401,19 +1620,28 @@ void audit_log_key(struct audit_buffer *ab, char *key)
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void audit_log_link_denied(const char *operation, struct path *link)
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{
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struct audit_buffer *ab;
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struct audit_names *name;
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name = kzalloc(sizeof(*name), GFP_NOFS);
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if (!name)
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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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if (!ab)
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return;
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audit_log_format(ab, "op=%s action=denied", operation);
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audit_log_format(ab, " pid=%d comm=", current->pid);
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audit_log_untrustedstring(ab, current->comm);
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audit_log_d_path(ab, " path=", link);
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audit_log_format(ab, " dev=");
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audit_log_untrustedstring(ab, link->dentry->d_inode->i_sb->s_id);
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audit_log_format(ab, " ino=%lu", link->dentry->d_inode->i_ino);
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goto out;
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audit_log_format(ab, "op=%s", operation);
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audit_log_task_info(ab, current);
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audit_log_format(ab, " res=0");
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audit_log_end(ab);
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/* Generate AUDIT_PATH record with object. */
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name->type = AUDIT_TYPE_NORMAL;
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audit_copy_inode(name, link->dentry, link->dentry->d_inode);
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audit_log_name(current->audit_context, name, link, 0, NULL);
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out:
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kfree(name);
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}
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/**
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157
kernel/audit.h
157
kernel/audit.h
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@ -22,6 +22,7 @@
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#include <linux/fs.h>
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#include <linux/audit.h>
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#include <linux/skbuff.h>
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#include <uapi/linux/mqueue.h>
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/* 0 = no checking
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1 = put_count checking
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@ -29,6 +30,11 @@
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*/
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#define AUDIT_DEBUG 0
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/* AUDIT_NAMES is the number of slots we reserve in the audit_context
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* for saving names from getname(). If we get more names we will allocate
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* a name dynamically and also add those to the list anchored by names_list. */
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#define AUDIT_NAMES 5
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/* At task start time, the audit_state is set in the audit_context using
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a per-task filter. At syscall entry, the audit_state is augmented by
|
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the syscall filter. */
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@ -59,8 +65,159 @@ struct audit_entry {
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struct audit_krule rule;
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};
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struct audit_cap_data {
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kernel_cap_t permitted;
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kernel_cap_t inheritable;
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union {
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unsigned int fE; /* effective bit of file cap */
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kernel_cap_t effective; /* effective set of process */
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};
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};
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/* When fs/namei.c:getname() is called, we store the pointer in name and
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* we don't let putname() free it (instead we free all of the saved
|
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* pointers at syscall exit time).
|
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*
|
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* Further, in fs/namei.c:path_lookup() we store the inode and device.
|
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*/
|
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struct audit_names {
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struct list_head list; /* audit_context->names_list */
|
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|
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struct filename *name;
|
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int name_len; /* number of chars to log */
|
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bool name_put; /* call __putname()? */
|
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|
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unsigned long ino;
|
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dev_t dev;
|
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umode_t mode;
|
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kuid_t uid;
|
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kgid_t gid;
|
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dev_t rdev;
|
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u32 osid;
|
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struct audit_cap_data fcap;
|
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unsigned int fcap_ver;
|
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unsigned char type; /* record type */
|
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/*
|
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* This was an allocated audit_names and not from the array of
|
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* names allocated in the task audit context. Thus this name
|
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* should be freed on syscall exit.
|
||||
*/
|
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bool should_free;
|
||||
};
|
||||
|
||||
/* The per-task audit context. */
|
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struct audit_context {
|
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int dummy; /* must be the first element */
|
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int in_syscall; /* 1 if task is in a syscall */
|
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enum audit_state state, current_state;
|
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unsigned int serial; /* serial number for record */
|
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int major; /* syscall number */
|
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struct timespec ctime; /* time of syscall entry */
|
||||
unsigned long argv[4]; /* syscall arguments */
|
||||
long return_code;/* syscall return code */
|
||||
u64 prio;
|
||||
int return_valid; /* return code is valid */
|
||||
/*
|
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* The names_list is the list of all audit_names collected during this
|
||||
* syscall. The first AUDIT_NAMES entries in the names_list will
|
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* actually be from the preallocated_names array for performance
|
||||
* reasons. Except during allocation they should never be referenced
|
||||
* through the preallocated_names array and should only be found/used
|
||||
* by running the names_list.
|
||||
*/
|
||||
struct audit_names preallocated_names[AUDIT_NAMES];
|
||||
int name_count; /* total records in names_list */
|
||||
struct list_head names_list; /* struct audit_names->list anchor */
|
||||
char *filterkey; /* key for rule that triggered record */
|
||||
struct path pwd;
|
||||
struct audit_aux_data *aux;
|
||||
struct audit_aux_data *aux_pids;
|
||||
struct sockaddr_storage *sockaddr;
|
||||
size_t sockaddr_len;
|
||||
/* Save things to print about task_struct */
|
||||
pid_t pid, ppid;
|
||||
kuid_t uid, euid, suid, fsuid;
|
||||
kgid_t gid, egid, sgid, fsgid;
|
||||
unsigned long personality;
|
||||
int arch;
|
||||
|
||||
pid_t target_pid;
|
||||
kuid_t target_auid;
|
||||
kuid_t target_uid;
|
||||
unsigned int target_sessionid;
|
||||
u32 target_sid;
|
||||
char target_comm[TASK_COMM_LEN];
|
||||
|
||||
struct audit_tree_refs *trees, *first_trees;
|
||||
struct list_head killed_trees;
|
||||
int tree_count;
|
||||
|
||||
int type;
|
||||
union {
|
||||
struct {
|
||||
int nargs;
|
||||
long args[6];
|
||||
} socketcall;
|
||||
struct {
|
||||
kuid_t uid;
|
||||
kgid_t gid;
|
||||
umode_t mode;
|
||||
u32 osid;
|
||||
int has_perm;
|
||||
uid_t perm_uid;
|
||||
gid_t perm_gid;
|
||||
umode_t perm_mode;
|
||||
unsigned long qbytes;
|
||||
} ipc;
|
||||
struct {
|
||||
mqd_t mqdes;
|
||||
struct mq_attr mqstat;
|
||||
} mq_getsetattr;
|
||||
struct {
|
||||
mqd_t mqdes;
|
||||
int sigev_signo;
|
||||
} mq_notify;
|
||||
struct {
|
||||
mqd_t mqdes;
|
||||
size_t msg_len;
|
||||
unsigned int msg_prio;
|
||||
struct timespec abs_timeout;
|
||||
} mq_sendrecv;
|
||||
struct {
|
||||
int oflag;
|
||||
umode_t mode;
|
||||
struct mq_attr attr;
|
||||
} mq_open;
|
||||
struct {
|
||||
pid_t pid;
|
||||
struct audit_cap_data cap;
|
||||
} capset;
|
||||
struct {
|
||||
int fd;
|
||||
int flags;
|
||||
} mmap;
|
||||
};
|
||||
int fds[2];
|
||||
|
||||
#if AUDIT_DEBUG
|
||||
int put_count;
|
||||
int ino_count;
|
||||
#endif
|
||||
};
|
||||
|
||||
#ifdef CONFIG_AUDIT
|
||||
extern int audit_enabled;
|
||||
extern int audit_ever_enabled;
|
||||
|
||||
extern void audit_copy_inode(struct audit_names *name,
|
||||
const struct dentry *dentry,
|
||||
const struct inode *inode);
|
||||
extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
|
||||
kernel_cap_t *cap);
|
||||
extern void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name);
|
||||
extern void audit_log_name(struct audit_context *context,
|
||||
struct audit_names *n, struct path *path,
|
||||
int record_num, int *call_panic);
|
||||
#endif
|
||||
|
||||
extern int audit_pid;
|
||||
|
|
|
|||
353
kernel/auditsc.c
353
kernel/auditsc.c
|
|
@ -76,11 +76,6 @@
|
|||
#define AUDITSC_SUCCESS 1
|
||||
#define AUDITSC_FAILURE 2
|
||||
|
||||
/* AUDIT_NAMES is the number of slots we reserve in the audit_context
|
||||
* for saving names from getname(). If we get more names we will allocate
|
||||
* a name dynamically and also add those to the list anchored by names_list. */
|
||||
#define AUDIT_NAMES 5
|
||||
|
||||
/* no execve audit message should be longer than this (userspace limits) */
|
||||
#define MAX_EXECVE_AUDIT_LEN 7500
|
||||
|
||||
|
|
@ -90,44 +85,6 @@ int audit_n_rules;
|
|||
/* determines whether we collect data for signals sent */
|
||||
int audit_signals;
|
||||
|
||||
struct audit_cap_data {
|
||||
kernel_cap_t permitted;
|
||||
kernel_cap_t inheritable;
|
||||
union {
|
||||
unsigned int fE; /* effective bit of a file capability */
|
||||
kernel_cap_t effective; /* effective set of a process */
|
||||
};
|
||||
};
|
||||
|
||||
/* When fs/namei.c:getname() is called, we store the pointer in name and
|
||||
* we don't let putname() free it (instead we free all of the saved
|
||||
* pointers at syscall exit time).
|
||||
*
|
||||
* Further, in fs/namei.c:path_lookup() we store the inode and device.
|
||||
*/
|
||||
struct audit_names {
|
||||
struct list_head list; /* audit_context->names_list */
|
||||
struct filename *name;
|
||||
unsigned long ino;
|
||||
dev_t dev;
|
||||
umode_t mode;
|
||||
kuid_t uid;
|
||||
kgid_t gid;
|
||||
dev_t rdev;
|
||||
u32 osid;
|
||||
struct audit_cap_data fcap;
|
||||
unsigned int fcap_ver;
|
||||
int name_len; /* number of name's characters to log */
|
||||
unsigned char type; /* record type */
|
||||
bool name_put; /* call __putname() for this name */
|
||||
/*
|
||||
* This was an allocated audit_names and not from the array of
|
||||
* names allocated in the task audit context. Thus this name
|
||||
* should be freed on syscall exit
|
||||
*/
|
||||
bool should_free;
|
||||
};
|
||||
|
||||
struct audit_aux_data {
|
||||
struct audit_aux_data *next;
|
||||
int type;
|
||||
|
|
@ -175,106 +132,6 @@ struct audit_tree_refs {
|
|||
struct audit_chunk *c[31];
|
||||
};
|
||||
|
||||
/* The per-task audit context. */
|
||||
struct audit_context {
|
||||
int dummy; /* must be the first element */
|
||||
int in_syscall; /* 1 if task is in a syscall */
|
||||
enum audit_state state, current_state;
|
||||
unsigned int serial; /* serial number for record */
|
||||
int major; /* syscall number */
|
||||
struct timespec ctime; /* time of syscall entry */
|
||||
unsigned long argv[4]; /* syscall arguments */
|
||||
long return_code;/* syscall return code */
|
||||
u64 prio;
|
||||
int return_valid; /* return code is valid */
|
||||
/*
|
||||
* The names_list is the list of all audit_names collected during this
|
||||
* syscall. The first AUDIT_NAMES entries in the names_list will
|
||||
* actually be from the preallocated_names array for performance
|
||||
* reasons. Except during allocation they should never be referenced
|
||||
* through the preallocated_names array and should only be found/used
|
||||
* by running the names_list.
|
||||
*/
|
||||
struct audit_names preallocated_names[AUDIT_NAMES];
|
||||
int name_count; /* total records in names_list */
|
||||
struct list_head names_list; /* anchor for struct audit_names->list */
|
||||
char * filterkey; /* key for rule that triggered record */
|
||||
struct path pwd;
|
||||
struct audit_aux_data *aux;
|
||||
struct audit_aux_data *aux_pids;
|
||||
struct sockaddr_storage *sockaddr;
|
||||
size_t sockaddr_len;
|
||||
/* Save things to print about task_struct */
|
||||
pid_t pid, ppid;
|
||||
kuid_t uid, euid, suid, fsuid;
|
||||
kgid_t gid, egid, sgid, fsgid;
|
||||
unsigned long personality;
|
||||
int arch;
|
||||
|
||||
pid_t target_pid;
|
||||
kuid_t target_auid;
|
||||
kuid_t target_uid;
|
||||
unsigned int target_sessionid;
|
||||
u32 target_sid;
|
||||
char target_comm[TASK_COMM_LEN];
|
||||
|
||||
struct audit_tree_refs *trees, *first_trees;
|
||||
struct list_head killed_trees;
|
||||
int tree_count;
|
||||
|
||||
int type;
|
||||
union {
|
||||
struct {
|
||||
int nargs;
|
||||
long args[AUDITSC_ARGS];
|
||||
} socketcall;
|
||||
struct {
|
||||
kuid_t uid;
|
||||
kgid_t gid;
|
||||
umode_t mode;
|
||||
u32 osid;
|
||||
int has_perm;
|
||||
uid_t perm_uid;
|
||||
gid_t perm_gid;
|
||||
umode_t perm_mode;
|
||||
unsigned long qbytes;
|
||||
} ipc;
|
||||
struct {
|
||||
mqd_t mqdes;
|
||||
struct mq_attr mqstat;
|
||||
} mq_getsetattr;
|
||||
struct {
|
||||
mqd_t mqdes;
|
||||
int sigev_signo;
|
||||
} mq_notify;
|
||||
struct {
|
||||
mqd_t mqdes;
|
||||
size_t msg_len;
|
||||
unsigned int msg_prio;
|
||||
struct timespec abs_timeout;
|
||||
} mq_sendrecv;
|
||||
struct {
|
||||
int oflag;
|
||||
umode_t mode;
|
||||
struct mq_attr attr;
|
||||
} mq_open;
|
||||
struct {
|
||||
pid_t pid;
|
||||
struct audit_cap_data cap;
|
||||
} capset;
|
||||
struct {
|
||||
int fd;
|
||||
int flags;
|
||||
} mmap;
|
||||
};
|
||||
int fds[2];
|
||||
|
||||
#if AUDIT_DEBUG
|
||||
int put_count;
|
||||
int ino_count;
|
||||
#endif
|
||||
};
|
||||
|
||||
static inline int open_arg(int flags, int mask)
|
||||
{
|
||||
int n = ACC_MODE(flags);
|
||||
|
|
@ -1109,88 +966,6 @@ static inline void audit_free_context(struct audit_context *context)
|
|||
kfree(context);
|
||||
}
|
||||
|
||||
int audit_log_task_context(struct audit_buffer *ab)
|
||||
{
|
||||
char *ctx = NULL;
|
||||
unsigned len;
|
||||
int error;
|
||||
u32 sid;
|
||||
|
||||
security_task_getsecid(current, &sid);
|
||||
if (!sid)
|
||||
return 0;
|
||||
|
||||
error = security_secid_to_secctx(sid, &ctx, &len);
|
||||
if (error) {
|
||||
if (error != -EINVAL)
|
||||
goto error_path;
|
||||
return 0;
|
||||
}
|
||||
|
||||
audit_log_format(ab, " subj=%s", ctx);
|
||||
security_release_secctx(ctx, len);
|
||||
return 0;
|
||||
|
||||
error_path:
|
||||
audit_panic("error in audit_log_task_context");
|
||||
return error;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(audit_log_task_context);
|
||||
|
||||
void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
|
||||
{
|
||||
const struct cred *cred;
|
||||
char name[sizeof(tsk->comm)];
|
||||
struct mm_struct *mm = tsk->mm;
|
||||
char *tty;
|
||||
|
||||
if (!ab)
|
||||
return;
|
||||
|
||||
/* tsk == current */
|
||||
cred = current_cred();
|
||||
|
||||
spin_lock_irq(&tsk->sighand->siglock);
|
||||
if (tsk->signal && tsk->signal->tty)
|
||||
tty = tsk->signal->tty->name;
|
||||
else
|
||||
tty = "(none)";
|
||||
spin_unlock_irq(&tsk->sighand->siglock);
|
||||
|
||||
|
||||
audit_log_format(ab,
|
||||
" ppid=%ld pid=%d auid=%u uid=%u gid=%u"
|
||||
" euid=%u suid=%u fsuid=%u"
|
||||
" egid=%u sgid=%u fsgid=%u ses=%u tty=%s",
|
||||
sys_getppid(),
|
||||
tsk->pid,
|
||||
from_kuid(&init_user_ns, tsk->loginuid),
|
||||
from_kuid(&init_user_ns, cred->uid),
|
||||
from_kgid(&init_user_ns, cred->gid),
|
||||
from_kuid(&init_user_ns, cred->euid),
|
||||
from_kuid(&init_user_ns, cred->suid),
|
||||
from_kuid(&init_user_ns, cred->fsuid),
|
||||
from_kgid(&init_user_ns, cred->egid),
|
||||
from_kgid(&init_user_ns, cred->sgid),
|
||||
from_kgid(&init_user_ns, cred->fsgid),
|
||||
tsk->sessionid, tty);
|
||||
|
||||
get_task_comm(name, tsk);
|
||||
audit_log_format(ab, " comm=");
|
||||
audit_log_untrustedstring(ab, name);
|
||||
|
||||
if (mm) {
|
||||
down_read(&mm->mmap_sem);
|
||||
if (mm->exe_file)
|
||||
audit_log_d_path(ab, " exe=", &mm->exe_file->f_path);
|
||||
up_read(&mm->mmap_sem);
|
||||
}
|
||||
audit_log_task_context(ab);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(audit_log_task_info);
|
||||
|
||||
static int audit_log_pid_context(struct audit_context *context, pid_t pid,
|
||||
kuid_t auid, kuid_t uid, unsigned int sessionid,
|
||||
u32 sid, char *comm)
|
||||
|
|
@ -1408,35 +1183,6 @@ static void audit_log_execve_info(struct audit_context *context,
|
|||
kfree(buf);
|
||||
}
|
||||
|
||||
static void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
|
||||
{
|
||||
int i;
|
||||
|
||||
audit_log_format(ab, " %s=", prefix);
|
||||
CAP_FOR_EACH_U32(i) {
|
||||
audit_log_format(ab, "%08x", cap->cap[(_KERNEL_CAPABILITY_U32S-1) - i]);
|
||||
}
|
||||
}
|
||||
|
||||
static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
|
||||
{
|
||||
kernel_cap_t *perm = &name->fcap.permitted;
|
||||
kernel_cap_t *inh = &name->fcap.inheritable;
|
||||
int log = 0;
|
||||
|
||||
if (!cap_isclear(*perm)) {
|
||||
audit_log_cap(ab, "cap_fp", perm);
|
||||
log = 1;
|
||||
}
|
||||
if (!cap_isclear(*inh)) {
|
||||
audit_log_cap(ab, "cap_fi", inh);
|
||||
log = 1;
|
||||
}
|
||||
|
||||
if (log)
|
||||
audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver);
|
||||
}
|
||||
|
||||
static void show_special(struct audit_context *context, int *call_panic)
|
||||
{
|
||||
struct audit_buffer *ab;
|
||||
|
|
@ -1534,68 +1280,6 @@ static void show_special(struct audit_context *context, int *call_panic)
|
|||
audit_log_end(ab);
|
||||
}
|
||||
|
||||
static void audit_log_name(struct audit_context *context, struct audit_names *n,
|
||||
int record_num, int *call_panic)
|
||||
{
|
||||
struct audit_buffer *ab;
|
||||
ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
|
||||
if (!ab)
|
||||
return; /* audit_panic has been called */
|
||||
|
||||
audit_log_format(ab, "item=%d", record_num);
|
||||
|
||||
if (n->name) {
|
||||
switch (n->name_len) {
|
||||
case AUDIT_NAME_FULL:
|
||||
/* log the full path */
|
||||
audit_log_format(ab, " name=");
|
||||
audit_log_untrustedstring(ab, n->name->name);
|
||||
break;
|
||||
case 0:
|
||||
/* name was specified as a relative path and the
|
||||
* directory component is the cwd */
|
||||
audit_log_d_path(ab, " name=", &context->pwd);
|
||||
break;
|
||||
default:
|
||||
/* log the name's directory component */
|
||||
audit_log_format(ab, " name=");
|
||||
audit_log_n_untrustedstring(ab, n->name->name,
|
||||
n->name_len);
|
||||
}
|
||||
} else
|
||||
audit_log_format(ab, " name=(null)");
|
||||
|
||||
if (n->ino != (unsigned long)-1) {
|
||||
audit_log_format(ab, " inode=%lu"
|
||||
" dev=%02x:%02x mode=%#ho"
|
||||
" ouid=%u ogid=%u rdev=%02x:%02x",
|
||||
n->ino,
|
||||
MAJOR(n->dev),
|
||||
MINOR(n->dev),
|
||||
n->mode,
|
||||
from_kuid(&init_user_ns, n->uid),
|
||||
from_kgid(&init_user_ns, n->gid),
|
||||
MAJOR(n->rdev),
|
||||
MINOR(n->rdev));
|
||||
}
|
||||
if (n->osid != 0) {
|
||||
char *ctx = NULL;
|
||||
u32 len;
|
||||
if (security_secid_to_secctx(
|
||||
n->osid, &ctx, &len)) {
|
||||
audit_log_format(ab, " osid=%u", n->osid);
|
||||
*call_panic = 2;
|
||||
} else {
|
||||
audit_log_format(ab, " obj=%s", ctx);
|
||||
security_release_secctx(ctx, len);
|
||||
}
|
||||
}
|
||||
|
||||
audit_log_fcaps(ab, n);
|
||||
|
||||
audit_log_end(ab);
|
||||
}
|
||||
|
||||
static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
|
||||
{
|
||||
int i, call_panic = 0;
|
||||
|
|
@ -1713,7 +1397,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
|
|||
|
||||
i = 0;
|
||||
list_for_each_entry(n, &context->names_list, list)
|
||||
audit_log_name(context, n, i++, &call_panic);
|
||||
audit_log_name(context, n, NULL, i++, &call_panic);
|
||||
|
||||
/* Send end of event record to help user space know we are finished */
|
||||
ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
|
||||
|
|
@ -2078,41 +1762,6 @@ void audit_putname(struct filename *name)
|
|||
#endif
|
||||
}
|
||||
|
||||
static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry)
|
||||
{
|
||||
struct cpu_vfs_cap_data caps;
|
||||
int rc;
|
||||
|
||||
if (!dentry)
|
||||
return 0;
|
||||
|
||||
rc = get_vfs_caps_from_disk(dentry, &caps);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
name->fcap.permitted = caps.permitted;
|
||||
name->fcap.inheritable = caps.inheritable;
|
||||
name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
|
||||
name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* Copy inode data into an audit_names. */
|
||||
static void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
|
||||
const struct inode *inode)
|
||||
{
|
||||
name->ino = inode->i_ino;
|
||||
name->dev = inode->i_sb->s_dev;
|
||||
name->mode = inode->i_mode;
|
||||
name->uid = inode->i_uid;
|
||||
name->gid = inode->i_gid;
|
||||
name->rdev = inode->i_rdev;
|
||||
security_inode_getsecid(inode, &name->osid);
|
||||
audit_copy_fcaps(name, dentry);
|
||||
}
|
||||
|
||||
/**
|
||||
* __audit_inode - store the inode and device from a lookup
|
||||
* @name: name being audited
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче