Date: Fri, 20 Dec 2002 19:07:25 -0800 (PST) From: Kirk McKusick <mckusick@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/ufs/ffs ffs_snapshot.c Message-ID: <200212210307.gBL37PZZ049014@repoman.freebsd.org>
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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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