51 lines
2.0 KiB
Diff
51 lines
2.0 KiB
Diff
From 13f0260beae851f7d5dd96e9ef757d8d6d7daac1 Mon Sep 17 00:00:00 2001
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From: Mark Adler <madler@alumni.caltech.edu>
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Date: Sun, 9 Feb 2020 07:20:13 -0800
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Subject: [PATCH] Fix false overlapped components detection on 32-bit systems.
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32-bit systems with ZIP64_SUPPORT enabled could have different
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size types for zoff_t and zusz_t. That resulted in bad parameter
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passing to the bound tracking functions, itself due to the lack of
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use of C function prototypes in unzip. This commit assures that
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parameters are cast properly for those calls.
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This problem occurred only for ill-chosen make options, which give
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a 32-bit zoff_t. A proper build will result in a zoff_t of 64 bits,
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even on 32-bit systems.
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---
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extract.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/extract.c b/extract.c
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index 1b73cb0..d9866f9 100644
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--- a/extract.c
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+++ b/extract.c
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@@ -329,7 +329,7 @@ static ZCONST char Far OverlappedComponents[] =
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/* A growable list of spans. */
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-typedef zoff_t bound_t;
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+typedef zusz_t bound_t;
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typedef struct {
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bound_t beg; /* start of the span */
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bound_t end; /* one past the end of the span */
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@@ -518,7 +518,8 @@ int extract_or_test_files(__G) /* return PK-type error code */
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return PK_MEM;
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}
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if ((G.extra_bytes != 0 &&
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- cover_add((cover_t *)G.cover, 0, G.extra_bytes) != 0) ||
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+ cover_add((cover_t *)G.cover,
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+ (bound_t)0, (bound_t)G.extra_bytes) != 0) ||
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(G.ecrec.have_ecr64 &&
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cover_add((cover_t *)G.cover, G.ecrec.ec64_start,
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G.ecrec.ec64_end) != 0) ||
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@@ -1216,7 +1217,7 @@ static int extract_or_test_entrylist(__G__ numchunk,
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/* seek_zipf(__G__ pInfo->offset); */
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request = G.pInfo->offset + G.extra_bytes;
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- if (cover_within((cover_t *)G.cover, request)) {
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+ if (cover_within((cover_t *)G.cover, (bound_t)request)) {
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Info(slide, 0x401, ((char *)slide,
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LoadFarString(OverlappedComponents)));
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return PK_BOMB;
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