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vim-patch:9.2.0219: call stack can be corrupted (#38406)

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Problem:  call stack can be corrupted, because calculated remaining
          capacity for call stack string can underflow (after v9.1.1983)
Solution: Calculate capacity against maximum capacity
          (Sergey Vlasov).

closes: vim/vim#19759

8e0483c2f4

Co-authored-by: Sergey Vlasov <sergey@vlasov.me>
This commit is contained in:
zeertzjq
2026-03-21 22:51:09 +08:00
committed by GitHub
parent fbac2e5edc
commit a969e92249
1 changed files with 1 additions and 1 deletions
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src/nvim/runtime.c
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@@ -222,7 +222,7 @@ char *estack_sfile(estack_arg_T which)
// <slnum>. Also leave it out when the number is not set. // <slnum>. Also leave it out when the number is not set.
if (lnum != 0) { if (lnum != 0) {
ga.ga_len += (int)vim_snprintf_safelen((char *)ga.ga_data + ga.ga_len, ga.ga_len += (int)vim_snprintf_safelen((char *)ga.ga_data + ga.ga_len,
len - (size_t)ga.ga_len, (size_t)(ga.ga_maxlen - ga.ga_len),
"[%" PRIdLINENR "]", lnum); "[%" PRIdLINENR "]", lnum);
} }
if (idx != exestack.ga_len - 1) { if (idx != exestack.ga_len - 1) {