35 lines
1.2 KiB
Diff
35 lines
1.2 KiB
Diff
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From 768ef2199e0265cf455b154f1a80a612f02274c8 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Mon, 28 Jun 2021 14:16:58 +1000
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Subject: video/readers/jpeg: Do not reallocate a given huff table
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Fix a memory leak where an invalid file could cause us to reallocate
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memory for a huffman table we had already allocated memory for.
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Reference:https://git.savannah.gnu.org/cgit/grub.git/commit/?id=768ef2199e0265cf455b154f1a80a612f02274c8
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Conflict:NA
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/video/readers/jpeg.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/grub-core/video/readers/jpeg.c b/grub-core/video/readers/jpeg.c
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index 806c56c..2284a6c 100644
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--- a/grub-core/video/readers/jpeg.c
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+++ b/grub-core/video/readers/jpeg.c
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@@ -251,6 +251,9 @@ grub_jpeg_decode_huff_table (struct grub_jpeg_data *data)
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n += count[i];
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id += ac * 2;
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+ if (data->huff_value[id] != NULL)
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+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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+ "jpeg: attempt to reallocate huffman table");
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data->huff_value[id] = grub_malloc (n);
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if (grub_errno)
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return grub_errno;
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--
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cgit v1.1
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