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patch 8.2.3402: invalid memory access when using :retab with large value

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Problem:    Invalid memory access when using :retab with large value.
Solution:   Check the number is positive.
This commit is contained in:
Bram Moolenaar
2021-09-04 18:47:28 +02:00
parent 10c83dde55
commit b7081e135a
5 changed files with 34 additions and 21 deletions
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12
src/option.c
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@@ -2449,9 +2449,9 @@ didset_options2(void)
#endif
#ifdef FEAT_VARTABS
vim_free(curbuf->b_p_vsts_array);
tabstop_set(curbuf->b_p_vsts, &curbuf->b_p_vsts_array);
(void)tabstop_set(curbuf->b_p_vsts, &curbuf->b_p_vsts_array);
vim_free(curbuf->b_p_vts_array);
tabstop_set(curbuf->b_p_vts, &curbuf->b_p_vts_array);
(void)tabstop_set(curbuf->b_p_vts, &curbuf->b_p_vts_array);
#endif
}
@@ -5947,7 +5947,7 @@ buf_copy_options(buf_T *buf, int flags)
buf->b_p_vsts = vim_strsave(p_vsts);
COPY_OPT_SCTX(buf, BV_VSTS);
if (p_vsts && p_vsts != empty_option)
tabstop_set(p_vsts, &buf->b_p_vsts_array);
(void)tabstop_set(p_vsts, &buf->b_p_vsts_array);
else
buf->b_p_vsts_array = 0;
buf->b_p_vsts_nopaste = p_vsts_nopaste
@@ -6107,7 +6107,7 @@ buf_copy_options(buf_T *buf, int flags)
buf->b_p_isk = save_p_isk;
#ifdef FEAT_VARTABS
if (p_vts && p_vts != empty_option && !buf->b_p_vts_array)
tabstop_set(p_vts, &buf->b_p_vts_array);
(void)tabstop_set(p_vts, &buf->b_p_vts_array);
else
buf->b_p_vts_array = NULL;
#endif
@@ -6122,7 +6122,7 @@ buf_copy_options(buf_T *buf, int flags)
buf->b_p_vts = vim_strsave(p_vts);
COPY_OPT_SCTX(buf, BV_VTS);
if (p_vts && p_vts != empty_option && !buf->b_p_vts_array)
tabstop_set(p_vts, &buf->b_p_vts_array);
(void)tabstop_set(p_vts, &buf->b_p_vts_array);
else
buf->b_p_vts_array = NULL;
#endif
@@ -6818,7 +6818,7 @@ paste_option_changed(void)
if (buf->b_p_vsts_array)
vim_free(buf->b_p_vsts_array);
if (buf->b_p_vsts && buf->b_p_vsts != empty_option)
tabstop_set(buf->b_p_vsts, &buf->b_p_vsts_array);
(void)tabstop_set(buf->b_p_vsts, &buf->b_p_vsts_array);
else
buf->b_p_vsts_array = 0;
#endif