[Bug 261457] Fix a possible Null pointer dereference in mld_is_addr_reported()

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 25 Jan 2022 07:11:23 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261457

            Bug ID: 261457
           Summary: Fix a possible Null pointer dereference in
                    mld_is_addr_reported()
           Product: Base System
           Version: Unspecified
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: zhou1615@umn.edu

Created attachment 231297
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=231297&action=edit
A simple fix for this bug

In mld_is_addr_reported(), the return value of mli_alloc_locked() is assigned
to mli and there is a dereference of it after that, which could lead to NULL
pointer dereference on failure of allocation.

Fix this bug by adding a NULL check of mli.

This bug is found by a static analyzer, please advise.

-- 
You are receiving this mail because:
You are the assignee for the bug.