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Only copy as much bytes as there in superblock, instead of the full

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block copy, when copying the superblock into the snapshot.  UFS1 does
not align superblock on the block boundary, and bcopy runs off the end
of the buffer.

Reported by:	Andre Albsmeier <Andre.Albsmeier@siemens.com>
Reviewed by:	mckusick
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2013-07-12 18:52:33 +00:00
parent 008ac71e0a
commit 2aea094f65
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=253280
1 changed files with 1 additions and 1 deletions
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2
sys/ufs/ffs/ffs_snapshot.c
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@ -792,7 +792,7 @@ ffs_snapshot(mp, snapfile)
brelse(nbp);
} else {
loc = blkoff(fs, fs->fs_sblockloc);
bcopy((char *)copy_fs, &nbp->b_data[loc], fs->fs_bsize);
bcopy((char *)copy_fs, &nbp->b_data[loc], (u_int)fs->fs_sbsize);
bawrite(nbp);
}
/*