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Subject: [Bug 197096] panic in arp_ifscrub when deleting entries marked
 LLE_STATIC
Date: Mon, 26 Jan 2015 15:15:41 +0000
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X-Bugzilla-Severity: Affects Some People
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197096

            Bug ID: 197096
           Summary: panic in arp_ifscrub when deleting entries marked
                    LLE_STATIC
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: lidl@pix.net

Created attachment 152183
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=152183&action=edit
patch to correct locking in arp_ifscrub

When renaming interfaces, if you attempt to delete the ARP entries that
are marked LLE_STATIC, the kernel will panic.

This is due to only holding a read lock when a write lock is required.

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