24 lines
840 B
Diff
24 lines
840 B
Diff
From 803f49aaae16b7f2899e4769afdfc673a21fa9e8 Mon Sep 17 00:00:00 2001
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From: Guido Draheim <guidod@gmx.de>
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Date: Mon, 26 Feb 2024 23:17:12 +0100
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Subject: [PATCH] #69 assert full zzip_file_header
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---
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zzip/mmapped.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/zzip/mmapped.c b/zzip/mmapped.c
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index 2071882..306ba51 100644
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--- a/zzip/mmapped.c
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+++ b/zzip/mmapped.c
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@@ -276,7 +276,8 @@ struct zzip_file_header *
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zzip_disk_entry_to_file_header(ZZIP_DISK * disk, struct zzip_disk_entry *entry)
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{
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zzip_byte_t *const ptr = disk->buffer + zzip_disk_entry_fileoffset(entry);
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- if (disk->buffer > ptr || ptr >= disk->endbuf)
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+ zzip_byte_t *const end = ptr + sizeof(struct zzip_file_header);
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+ if (disk->buffer > ptr || end >= disk->endbuf || end <= NULL)
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{
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errno = EBADMSG;
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return 0;
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