cirno/plan9port
1
0
Fork 0
mirror of https://github.com/9fans/plan9port.git synced 2025-01-12 11:10:07 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

acme: fix buffer overflow introduced in parsetag refactor

Browse source
This commit is contained in:
Russ Cox 2020-01-13 23:17:16 -05:00
parent 125cfe1c0d
commit 573169dd88
3 changed files with 8 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/cmd/acme/fns.h
View file

@ -95,7 +95,7 @@ void flushwarnings(void);
void startplumbing(void);
long nlcount(Text*, long, long, long*);
long nlcounttopos(Text*, long, long, long);
Rune* parsetag(Window*, int*);
Rune* parsetag(Window*, int, int*);
Runestr runestr(Rune*, uint);
Range range(int, int);

2
src/cmd/acme/look.c
View file

@ -490,7 +490,7 @@ dirname(Text *t, Rune *r, int n)
goto Rescue;
if(n>=1 && r[0]=='/')
goto Rescue;
b = parsetag(t->w, &i);
b = parsetag(t->w, n, &i);
slash = -1;
for(i--; i >= 0; i--){
if(b[i] == '/'){

12
src/cmd/acme/wind.c
View file

@ -113,7 +113,7 @@ delrunepos(Window *w)
Rune *r;
int i;
r = parsetag(w, &i);
r = parsetag(w, 0, &i);
free(r);
i += 2;
if(i >= w->tag.file->b.nc)
@ -416,7 +416,7 @@ wincleartag(Window *w)
/* w must be committed */
n = w->tag.file->b.nc;
r = parsetag(w, &i);
r = parsetag(w, 0, &i);
for(; i<n; i++)
if(r[i] == '|')
break;
@ -434,7 +434,7 @@ wincleartag(Window *w)
}
Rune*
parsetag(Window *w, int *len)
parsetag(Window *w, int extra, int *len)
{
static Rune Ldelsnarf[] = { ' ', 'D', 'e', 'l', ' ', 'S', 'n', 'a', 'r', 'f', 0 };
static Rune Lspacepipe[] = { ' ', '|', 0 };
@ -442,7 +442,7 @@ parsetag(Window *w, int *len)
int i;
Rune *r, *p, *pipe;
r = runemalloc(w->tag.file->b.nc+1);
r = runemalloc(w->tag.file->b.nc+extra+1);
bufread(&w->tag.file->b, 0, r, w->tag.file->b.nc);
r[w->tag.file->b.nc] = '\0';
@ -483,7 +483,7 @@ winsettag1(Window *w)
/* there are races that get us here with stuff in the tag cache, so we take extra care to sync it */
if(w->tag.ncache!=0 || w->tag.file->mod)
wincommit(w, &w->tag); /* check file name; also guarantees we can modify tag contents */
old = parsetag(w, &i);
old = parsetag(w, 0, &i);
if(runeeq(old, i, w->body.file->name, w->body.file->nname) == FALSE){
textdelete(&w->tag, 0, i, TRUE);
textinsert(&w->tag, 0, w->body.file->name, w->body.file->nname, TRUE);
@ -604,7 +604,7 @@ wincommit(Window *w, Text *t)
textcommit(f->text[i], FALSE); /* no-op for t */
if(t->what == Body)
return;
r = parsetag(w, &i);
r = parsetag(w, 0, &i);
if(runeeq(r, i, w->body.file->name, w->body.file->nname) == FALSE){
seq++;
filemark(w->body.file);