From: Daniel Axtens <d...@axtens.net>
In some cases attempting to display arbitrary binary strings leads
to ASAN splats reading the widthspec array out of bounds.
Check the index. If it would be out of bounds, return a width of 1.
I don't know if that's strictly correct, but we're not really expecting
great display of arbitrary binary data, and it's certainly not worse than
an OOB read.
Signed-off-by: Daniel Axtens <d...@axtens.net>
Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>
---
grub-core/normal/charset.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/grub-core/normal/charset.c b/grub-core/normal/charset.c
index 7778f1a99..000e687bd 100644
--- a/grub-core/normal/charset.c
+++ b/grub-core/normal/charset.c
@@ -395,6 +395,8 @@ grub_unicode_estimate_width (const struct
grub_unicode_glyph *c)
{
if (grub_unicode_get_comb_type (c->base))
return 0;
+ if (((unsigned long) (c->base >> 3)) >= ARRAY_SIZE (widthspec))
+ return 1;
if (widthspec[c->base >> 3] & (1 << (c->base & 7)))
return 2;
else
--
2.11.0
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