[Bug 264057] mad: Fix a possible memory leak

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 18 May 2022 03:28:36 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264057

            Bug ID: 264057
           Summary: mad: Fix a possible memory leak
           Product: Base System
           Version: Unspecified
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: ruc_gongyuanjun@163.com

Created attachment 234011
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=234011&action=edit
a possible patch

If ib_dma_mapping_error, it will jump out of the loop, leaving
mad_priv allocated by alloc_mad_private not freed. It will cause
a memory leak. Fix it with kfree.

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