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Don't crash when utilities are dumb and try to read less than the disk block

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size (dumpfs may try to read the cylinder size (or is is sector size?) by way
of bread).  Prevents a bounds error.
This commit is contained in:
Juli Mallett 2003-01-19 01:39:53 +00:00
parent a778dc9ca5
commit e3e8d2ca45
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=109511
1 changed files with 1 additions and 1 deletions
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lib/libufs/block.c
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@ -63,7 +63,7 @@ bread(struct uufsd *disk, ufs2_daddr_t blockno, void *data, size_t size)
*/
if (cnt != size) {
ERROR(disk, "short read from block device");
for (cnt = 0; cnt < disk->d_fs.fs_bsize; cnt++)
for (cnt = 0; cnt < MIN(size, disk->d_fs.fs_bsize); cnt++)
buf[cnt] = 0;
return -1;
}