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make dump_common_audit_data() safe to be called from RCU pathwalk 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2021-01-05 14:19:11 -05:00
parent bca585d24a
commit 23d8f5b684
1 changed files with 3 additions and 2 deletions
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5
security/lsm_audit.c
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@ -291,18 +291,19 @@ static void dump_common_audit_data(struct audit_buffer *ab,
struct dentry *dentry;
struct inode *inode;
rcu_read_lock();
inode = a->u.inode;
dentry = d_find_alias(inode);
dentry = d_find_alias_rcu(inode);
if (dentry) {
audit_log_format(ab, " name=");
spin_lock(&dentry->d_lock);
audit_log_untrustedstring(ab, dentry->d_name.name);
spin_unlock(&dentry->d_lock);
dput(dentry);
}
audit_log_format(ab, " dev=");
audit_log_untrustedstring(ab, inode->i_sb->s_id);
audit_log_format(ab, " ino=%lu", inode->i_ino);
rcu_read_unlock();
break;
}
case LSM_AUDIT_DATA_TASK: {