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patch 9.0.1859: heap-use-after-free in bt_normal()

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Problem:  heap-use-after-free in bt_normal()
Solution: check that buffer is still valid

Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2023-09-03 21:43:46 +02:00
parent ee9166eb3b
commit 6e60cf444a
4 changed files with 18 additions and 1 deletions
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2
src/buffer.c
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@@ -5777,7 +5777,7 @@ bt_normal(buf_T *buf)
bt_quickfix(buf_T *buf UNUSED)
{
#ifdef FEAT_QUICKFIX
return buf != NULL && buf->b_p_bt[0] == 'q';
return buf != NULL && buf_valid(buf) && buf->b_p_bt[0] == 'q';
#else
return FALSE;
#endif