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From: Kirk McKusick <mckusick@FreeBSD.org>
Date: Fri, 20 Dec 2002 19:07:25 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/ufs/ffs ffs_snapshot.c
X-FreeBSD-CVS-Branch: RELENG_5_0
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mckusick    2002/12/20 19:07:25 PST

  Modified files:        (Branch: RELENG_5_0)
    sys/ufs/ffs          ffs_snapshot.c 
  Log:
  MFC of revision 1.57 of sys/ufs/ffs/ffs_snapshot.c. This update
  corrects a sign-post error introduced in revision 1.56. The effect
  was to put an additional (incorrect) block into the lookup list for
  each metablock in the snapshot. The extra incorrect block causes
  background fsck to panic the kernel with "freeing free block".
  For large filesystems, the large number of extra blocks can overrun
  the area malloc'ed to hold the lookup list resulting in corruption
  of the malloc arena.
  
  Reported by:    Aurelien Nephtali <aurelien.nephtali@wanadoo.fr>
  Sponsored by:   DARPA & NAI Labs.
  Approved by:    re
  
  Revision  Changes    Path
  1.53.2.3  +12 -4     src/sys/ufs/ffs/ffs_snapshot.c

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