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D46169.id141473.diff
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diff --git a/usr.bin/diff/diffreg.c b/usr.bin/diff/diffreg.c
--- a/usr.bin/diff/diffreg.c
+++ b/usr.bin/diff/diffreg.c
@@ -203,9 +203,9 @@
static int *member; /* will be overlaid on file[1] */
static int clen;
static int inifdef; /* whether or not we are in a #ifdef block */
-static int len[2];
-static int pref, suff; /* length of prefix and suffix */
-static int slen[2];
+static size_t len[2]; /* lengths of files in lines */
+static size_t pref, suff; /* lengths of prefix and suffix */
+static size_t slen[2]; /* lengths of files minus pref / suff */
static int anychange;
static int hw, lpad,rpad; /* half width and padding */
static int edoffset;
@@ -425,6 +425,10 @@
status |= 1;
goto closem;
}
+ if (len[0] >= INT_MAX - 2)
+ errc(1, EFBIG, "%s", file1);
+ if (len[1] >= INT_MAX - 2)
+ errc(1, EFBIG, "%s", file2);
prune();
sort(sfile[0], slen[0]);
@@ -550,18 +554,17 @@
sz = 100;
p = xcalloc(sz + 3, sizeof(*p));
- while ((r = readhash(fd, flags, &h)) != RH_EOF)
- switch (r) {
- case RH_EOF: /* otherwise clang complains */
- case RH_BINARY:
+ while ((r = readhash(fd, flags, &h)) != RH_EOF) {
+ if (r == RH_BINARY)
return (false);
- case RH_OK:
- if (j == sz) {
- sz = sz * 3 / 2;
- p = xreallocarray(p, sz + 3, sizeof(*p));
- }
- p[++j].value = h;
+ if (j == SIZE_MAX)
+ break;
+ if (j == sz) {
+ sz = sz * 3 / 2;
+ p = xreallocarray(p, sz + 3, sizeof(*p));
}
+ p[++j].value = h;
+ }
len[i] = j;
file[i] = p;
@@ -572,7 +575,7 @@
static void
prune(void)
{
- int i, j;
+ size_t i, j;
for (pref = 0; pref < len[0] && pref < len[1] &&
file[0][pref + 1].value == file[1][pref + 1].value;
@@ -710,7 +713,7 @@
unravel(int p)
{
struct cand *q;
- int i;
+ size_t i;
for (i = 0; i <= len[0]; i++)
J[i] = i <= pref ? i :
@@ -737,7 +740,7 @@
ixold[0] = ixnew[0] = 0;
/* jackpot = 0; */
ctold = ctnew = 0;
- for (i = 1; i <= len[0]; i++) {
+ for (i = 1; i <= (int)len[0]; i++) {
if (J[i] == 0) {
ixold[i] = ctold += skipline(f1);
continue;
@@ -837,7 +840,7 @@
ixnew[j] = ctnew;
j++;
}
- for (; j <= len[1]; j++) {
+ for (; j <= (int)len[1]; j++) {
ixnew[j] = ctnew += skipline(f2);
}
/*
@@ -1504,9 +1507,9 @@
b = d = 0; /* gcc */
lowa = MAX(1, cvp->a - diff_context);
- upb = MIN(len[0], context_vec_ptr->b + diff_context);
+ upb = MIN((int)len[0], context_vec_ptr->b + diff_context);
lowc = MAX(1, cvp->c - diff_context);
- upd = MIN(len[1], context_vec_ptr->d + diff_context);
+ upd = MIN((int)len[1], context_vec_ptr->d + diff_context);
printf("***************");
if (flags & (D_PROTOTYPE | D_MATCHLAST)) {
@@ -1607,9 +1610,9 @@
b = d = 0; /* gcc */
lowa = MAX(1, cvp->a - diff_context);
- upb = MIN(len[0], context_vec_ptr->b + diff_context);
+ upb = MIN((int)len[0], context_vec_ptr->b + diff_context);
lowc = MAX(1, cvp->c - diff_context);
- upd = MIN(len[1], context_vec_ptr->d + diff_context);
+ upd = MIN((int)len[1], context_vec_ptr->d + diff_context);
printf("@@ -");
uni_range(lowa, upb);

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