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Be even more paranoid about overflow.

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Requested by:	ache
This commit is contained in:
truckman 2014-05-19 04:55:53 +00:00
parent 0d5a1c60ff
commit 1c84835558
1 changed files with 4 additions and 4 deletions
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8
sys/kern/subr_rman.c
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@ -466,8 +466,8 @@ rman_reserve_resource_bound(struct rman *rm, u_long start, u_long end,
}
amask = (1ul << RF_ALIGNMENT(flags)) - 1;
if (start + amask < start) {
DPRINTF(("start+amask wrapped around\n"));
if (start > ULONG_MAX - amask) {
DPRINTF(("start+amask would wrap around\n"));
goto out;
}
@ -487,8 +487,8 @@ rman_reserve_resource_bound(struct rman *rm, u_long start, u_long end,
s->r_start, end));
break;
}
if (s->r_start + amask < s->r_start) {
DPRINTF(("s->r_start (%#lx) + amask (%#lx) wrapped\n",
if (s->r_start > ULONG_MAX - amask) {
DPRINTF(("s->r_start (%#lx) + amask (%#lx) too large\n",
s->r_start, amask));
break;
}