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44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
$NetBSD: patch-ac,v 1.4 2008/03/08 08:56:47 adam Exp $
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--- libntfs/attrib.c.orig 2007-09-26 20:28:34.000000000 +0200
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+++ libntfs/attrib.c
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@@ -865,7 +865,7 @@ map_rl:
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*/
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s64 ntfs_attr_pread(ntfs_attr *na, const s64 pos, s64 count, void *b)
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{
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- s64 br, to_read, ofs, total, total2;
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+ s64 br, to_read, ofs, total, total2, origcount;
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ntfs_volume *vol;
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runlist_element *rl;
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@@ -892,6 +892,7 @@ s64 ntfs_attr_pread(ntfs_attr *na, const
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vol = na->ni->vol;
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if (!count)
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return 0;
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+ origcount = count;
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/* Truncate reads beyond end of attribute. */
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if (pos + count > na->data_size) {
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if (pos >= na->data_size)
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@@ -982,7 +983,7 @@ res_err_out:
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continue;
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}
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/* It is a real lcn, read it into @dst. */
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- to_read = min(count, (rl->length << vol->cluster_size_bits) -
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+ to_read = min(origcount, (rl->length << vol->cluster_size_bits) -
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ofs);
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retry:
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ntfs_log_trace("Reading 0x%llx bytes from vcn 0x%llx, "
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@@ -990,6 +991,12 @@ retry:
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rl->lcn, ofs);
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br = ntfs_pread(vol->dev, (rl->lcn << vol->cluster_size_bits) +
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ofs, to_read, b);
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+ /* Zero any overage that we may have read */
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+ if (br > count) {
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+ memset(b + count, 0, br - count);
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+ total += count;
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+ return total + total2;
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+ }
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/* If everything ok, update progress counters and continue. */
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if (br > 0) {
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total += br;
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