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vim-patch:9.1.0438: Wrong Ex command executed when :g uses '?' as delimiter (#28956)

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Problem:  Wrong Ex command executed when :g uses '?' as delimiter and
          pattern contains escaped '?'.
Solution: Don't use "*newp" when it's not allocated (zeertzjq).

closes: vim/vim#14837

3074137542
This commit is contained in:
zeertzjq
2024-05-24 15:04:33 +08:00
committed by GitHub
parent 521b9930b8
commit c836383d21
3 changed files with 18 additions and 5 deletions
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8
src/nvim/regexp.c
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@@ -774,7 +774,7 @@ char *skip_regexp_ex(char *startp, int dirc, int magic, char **newp, int *droppe
{
magic_T mymagic;
char *p = startp;
size_t startplen = strlen(startp);
size_t startplen = 0;
if (magic) {
mymagic = MAGIC_ON;
@@ -796,14 +796,18 @@ char *skip_regexp_ex(char *startp, int dirc, int magic, char **newp, int *droppe
} else if (p[0] == '\\' && p[1] != NUL) {
if (dirc == '?' && newp != NULL && p[1] == '?') {
// change "\?" to "?", make a copy first.
if (startplen == 0) {
startplen = strlen(startp);
}
if (*newp == NULL) {
*newp = xstrnsave(startp, startplen);
p = *newp + (p - startp);
startp = *newp;
}
if (dropped != NULL) {
(*dropped)++;
}
memmove(p, p + 1, (startplen - (size_t)((p + 1) - *newp)) + 1);
memmove(p, p + 1, startplen - (size_t)((p + 1) - startp) + 1);
} else {
p++; // skip next character
}