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34 lines
1.1 KiB
34 lines
1.1 KiB
2 years ago
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Alexey Makhalov <amakhalov@vmware.com>
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Date: Wed, 8 Jul 2020 20:41:56 +0000
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Subject: [PATCH] gfxmenu: Fix double free in load_image()
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self->bitmap should be zeroed after free. Otherwise, there is a chance
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to double free (USE_AFTER_FREE) it later in rescale_image().
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Fixes: CID 292472
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Signed-off-by: Alexey Makhalov <amakhalov@vmware.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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Upstream-commit-id: 5d3e84b15a4
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---
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grub-core/gfxmenu/gui_image.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/grub-core/gfxmenu/gui_image.c b/grub-core/gfxmenu/gui_image.c
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index 29784ed2d..6b2e976f1 100644
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--- a/grub-core/gfxmenu/gui_image.c
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+++ b/grub-core/gfxmenu/gui_image.c
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@@ -195,7 +195,10 @@ load_image (grub_gui_image_t self, const char *path)
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return grub_errno;
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if (self->bitmap && (self->bitmap != self->raw_bitmap))
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- grub_video_bitmap_destroy (self->bitmap);
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+ {
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+ grub_video_bitmap_destroy (self->bitmap);
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+ self->bitmap = 0;
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+ }
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if (self->raw_bitmap)
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grub_video_bitmap_destroy (self->raw_bitmap);
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