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authorKees Cook <keescook@chromium.org>2012-07-25 17:29:08 -0700
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-29 21:43:08 +0400
commita51d9eaa41866ab6b4b6ecad7b621f8b66ece0dc (patch)
treef8ab532f946ec7f9ccdabb6a394d952981084122 /kernel/audit.c
parent800179c9b8a1e796e441674776d11cd4c05d61d7 (diff)
downloadlinaro-lsk-a51d9eaa41866ab6b4b6ecad7b621f8b66ece0dc.tar.gz
fs: add link restriction audit reporting
Adds audit messages for unexpected link restriction violations so that system owners will have some sort of potentially actionable information about misbehaving processes. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/audit.c')
-rw-r--r--kernel/audit.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index 1c7f2c61416..fda8bd9e1d3 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1450,6 +1450,27 @@ void audit_log_key(struct audit_buffer *ab, char *key)
}
/**
+ * audit_log_link_denied - report a link restriction denial
+ * @operation: specific link opreation
+ * @link: the path that triggered the restriction
+ */
+void audit_log_link_denied(const char *operation, struct path *link)
+{
+ struct audit_buffer *ab;
+
+ ab = audit_log_start(current->audit_context, GFP_KERNEL,
+ AUDIT_ANOM_LINK);
+ audit_log_format(ab, "op=%s action=denied", operation);
+ audit_log_format(ab, " pid=%d comm=", current->pid);
+ audit_log_untrustedstring(ab, current->comm);
+ audit_log_d_path(ab, " path=", link);
+ audit_log_format(ab, " dev=");
+ audit_log_untrustedstring(ab, link->dentry->d_inode->i_sb->s_id);
+ audit_log_format(ab, " ino=%lu", link->dentry->d_inode->i_ino);
+ audit_log_end(ab);
+}
+
+/**
* audit_log_end - end one audit record
* @ab: the audit_buffer
*