From a51d9eaa41866ab6b4b6ecad7b621f8b66ece0dc Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 25 Jul 2012 17:29:08 -0700 Subject: 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 Signed-off-by: Al Viro --- kernel/audit.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'kernel/audit.c') diff --git a/kernel/audit.c b/kernel/audit.c index 1c7f2c61416..fda8bd9e1d3 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1449,6 +1449,27 @@ void audit_log_key(struct audit_buffer *ab, char *key) audit_log_format(ab, "(null)"); } +/** + * 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 -- cgit v1.2.3