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patch 8.2.2779: memory access error in remove() for blob

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Problem:    Memory access error in remove() for blob.
Solution:   Adjust length for memmove().
This commit is contained in:
Bram Moolenaar
2021-04-17 21:22:49 +02:00
parent d23b714d8b
commit f7e92aae15
2 changed files with 5 additions and 2 deletions
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5
src/blob.c
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@@ -444,7 +444,7 @@ blob_remove(typval_T *argvars, typval_T *rettv)
{
blob_T *blob;
// Remove range of items, return list with values.
// Remove range of items, return blob with values.
end = (long)tv_get_number_chk(&argvars[2], &error);
if (error)
return;
@@ -472,7 +472,8 @@ blob_remove(typval_T *argvars, typval_T *rettv)
rettv->v_type = VAR_BLOB;
rettv->vval.v_blob = blob;
mch_memmove(p + idx, p + end + 1, (size_t)(len - end));
if (len - end - 1 > 0)
mch_memmove(p + idx, p + end + 1, (size_t)(len - end - 1));
b->bv_ga.ga_len -= end - idx + 1;
}
}