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patch 9.1.0115: Using freed memory with full tag stack and user data

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Problem:  Using freed memory with full tag stack and user data
          (Konstantin Khlebnikov)
Solution: Clear the user data pointer of the newest entry.
          (zeertzjq, Konstantin Khlebnikov)

fixes: neovim/neovim#27498
closes: #14053

Co-authored-by: Konstantin Khlebnikov koct9i@gmail.com
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Konstantin Khlebnikov koct9i@gmail.com
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
zeertzjq
2024-02-18 18:53:08 +01:00
committed by Christian Brabandt
parent 026b17404a
commit c86bff1771
4 changed files with 26 additions and 9 deletions
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2
src/tag.c
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@@ -395,7 +395,7 @@ do_tag(
tagstack_clear_entry(&tagstack[0]);
for (i = 1; i < tagstacklen; ++i)
tagstack[i - 1] = tagstack[i];
--tagstackidx;
tagstack[--tagstackidx].user_data = NULL;
}
/*