41 lines
1.0 KiB
Diff
41 lines
1.0 KiB
Diff
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From 6bacfdcb84a4b80c7c026e926b7e1f84d6eed26d Mon Sep 17 00:00:00 2001
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From: shixuantong <1726671442@qq.com>
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Date: Wed, 6 Apr 2022 17:40:57 +0800
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Subject: [PATCH] Ensure that sz is greater than 0.
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---
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lib/block.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/lib/block.c b/lib/block.c
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index 092bc28..80b41ac 100644
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--- a/lib/block.c
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+++ b/lib/block.c
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@@ -118,6 +118,11 @@ th_read(TAR *t)
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if (TH_ISLONGLINK(t))
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{
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sz = th_get_size(t);
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+ if (sz <= 0)
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+ {
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+ errno = EINVAL;
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+ return -1;
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+ }
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blocks = (sz / T_BLOCKSIZE) + (sz % T_BLOCKSIZE ? 1 : 0);
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if (blocks > ((size_t)-1 / T_BLOCKSIZE))
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{
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@@ -168,6 +173,11 @@ th_read(TAR *t)
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if (TH_ISLONGNAME(t))
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{
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sz = th_get_size(t);
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+ if (sz <= 0)
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+ {
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+ errno = EINVAL;
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+ return -1;
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+ }
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blocks = (sz / T_BLOCKSIZE) + (sz % T_BLOCKSIZE ? 1 : 0);
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if (blocks > ((size_t)-1 / T_BLOCKSIZE))
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{
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--
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1.8.3.1
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