diff options
Diffstat (limited to 'kernel/audit.c')
| -rw-r--r-- | kernel/audit.c | 46 |
1 files changed, 21 insertions, 25 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index 5ffcbd354a52..2651e423b2dc 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -110,7 +110,6 @@ static u32 audit_backlog_limit = 64; #define AUDIT_BACKLOG_WAIT_TIME (60 * HZ) static u32 audit_backlog_wait_time_master = AUDIT_BACKLOG_WAIT_TIME; static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME; -static u32 audit_backlog_wait_overflow = 0; /* The identity of the user shutting down the audit system. */ kuid_t audit_sig_uid = INVALID_UID; @@ -509,8 +508,7 @@ static void flush_hold_queue(void) * if auditd just disappeared but we * dequeued an skb we need to drop ref */ - if (skb) - consume_skb(skb); + consume_skb(skb); } static int kauditd_thread(void *dummy) @@ -524,7 +522,8 @@ static int kauditd_thread(void *dummy) skb = skb_dequeue(&audit_skb_queue); if (skb) { - if (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit) + if (!audit_backlog_limit || + (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit)) wake_up(&audit_backlog_wait); if (audit_pid) kauditd_send_skb(skb); @@ -921,7 +920,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if (err == 1) { /* match or error */ err = 0; if (msg_type == AUDIT_USER_TTY) { - err = tty_audit_push_current(); + err = tty_audit_push(); if (err) break; } @@ -1031,20 +1030,19 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) break; case AUDIT_TTY_GET: { struct audit_tty_status s; - struct task_struct *tsk = current; + unsigned int t; - spin_lock(&tsk->sighand->siglock); - s.enabled = tsk->signal->audit_tty; - s.log_passwd = tsk->signal->audit_tty_log_passwd; - spin_unlock(&tsk->sighand->siglock); + t = READ_ONCE(current->signal->audit_tty); + s.enabled = t & AUDIT_TTY_ENABLE; + s.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD); audit_send_reply(skb, seq, AUDIT_TTY_GET, 0, 0, &s, sizeof(s)); break; } case AUDIT_TTY_SET: { struct audit_tty_status s, old; - struct task_struct *tsk = current; struct audit_buffer *ab; + unsigned int t; memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ @@ -1054,14 +1052,14 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) (s.log_passwd != 0 && s.log_passwd != 1)) err = -EINVAL; - spin_lock(&tsk->sighand->siglock); - old.enabled = tsk->signal->audit_tty; - old.log_passwd = tsk->signal->audit_tty_log_passwd; - if (!err) { - tsk->signal->audit_tty = s.enabled; - tsk->signal->audit_tty_log_passwd = s.log_passwd; + if (err) + t = READ_ONCE(current->signal->audit_tty); + else { + t = s.enabled | (-s.log_passwd & AUDIT_TTY_LOG_PASSWD); + t = xchg(¤t->signal->audit_tty, t); } - spin_unlock(&tsk->sighand->siglock); + old.enabled = t & AUDIT_TTY_ENABLE; + old.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD); audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d" @@ -1232,9 +1230,7 @@ static void audit_buffer_free(struct audit_buffer *ab) if (!ab) return; - if (ab->skb) - kfree_skb(ab->skb); - + kfree_skb(ab->skb); spin_lock_irqsave(&audit_freelist_lock, flags); if (audit_freelist_count > AUDIT_MAXFREE) kfree(ab); @@ -1372,7 +1368,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, return NULL; if (gfp_mask & __GFP_DIRECT_RECLAIM) { - if (audit_pid && audit_pid == current->pid) + if (audit_pid && audit_pid == current->tgid) gfp_mask &= ~__GFP_DIRECT_RECLAIM; else reserve = 0; @@ -1395,12 +1391,12 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, skb_queue_len(&audit_skb_queue), audit_backlog_limit); audit_log_lost("backlog limit exceeded"); - audit_backlog_wait_time = audit_backlog_wait_overflow; + audit_backlog_wait_time = 0; wake_up(&audit_backlog_wait); return NULL; } - if (!reserve) + if (!reserve && !audit_backlog_wait_time) audit_backlog_wait_time = audit_backlog_wait_time_master; ab = audit_buffer_alloc(ctx, gfp_mask, type); @@ -1722,7 +1718,7 @@ static inline int audit_copy_fcaps(struct audit_names *name, /* Copy inode data into an audit_names. */ void audit_copy_inode(struct audit_names *name, const struct dentry *dentry, - const struct inode *inode) + struct inode *inode) { name->ino = inode->i_ino; name->dev = inode->i_sb->s_dev; |
