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From e219c9548d16a3c18dd261f7043bb8d221b87c77 Mon Sep 17 00:00:00 2001
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From: Panu Matilainen <pmatilai@redhat.com>
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Date: Wed, 31 Jul 2019 11:56:26 +0300
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Subject: [PATCH] Fix off-by-one in hdrblobGet() making last entry unreachable
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(RhBug:1722921)
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hdrblobGet() introduced in commits acfde0d0e812e9f8e153ab6be8c9f2682bdd4763
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and 9821de18811db97238c34a564221e315f5f35b44 has an off-by-one thinko
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(perhaps the idea was to skip the first, region tag) which causes
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the last entry to be unreachable. In typical packages, that is
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RPMSIG_PAYLOADSIZE which is not used at all in this context so it doesn't
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matter, but in large packages use RPMSIG_LONGARCHIVESIZE which has a lower
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tag number and leaves either RPMSIGTAG_MD5 or RPMSIGTAG_GPG last,
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unreachable and thus unverifiable. Oops.
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This fixes the regression introduced in rpm 4.14, affecting verification
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of large packages (ie having RPMSIG_LONGARCHIVESIZE)
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---
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lib/header.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/lib/header.c b/lib/header.c
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index 33623884a..9ec7ed0e4 100644
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--- a/lib/header.c
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+++ b/lib/header.c
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@@ -2015,7 +2015,7 @@ rpmRC hdrblobGet(hdrblob blob, uint32_t tag, rpmtd td)
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memset(&einfo, 0, sizeof(einfo));
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rpmtdReset(td);
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- for (int i = 1; i < blob->il; i++, pe++) {
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+ for (int i = 0; i < blob->il; i++, pe++) {
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if (pe->tag != ntag)
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continue;
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ei2h(pe, &einfo);
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--
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2.21.0
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