diff options
| author | Steven Barth <steven@midlink.org> | 2015-04-14 10:31:10 +0200 |
|---|---|---|
| committer | Steven Barth <steven@midlink.org> | 2015-04-14 10:31:10 +0200 |
| commit | a06dd6481cd046e4856774ac32cdc11f4bc721e2 (patch) | |
| tree | 28ad21b0e6ea51cd1eb9546959ffc20431aaf702 /src/dhcpv6-ia.c | |
| parent | e23972527f93a3d2a5412400384519ff550708b7 (diff) | |
Fix potential invalid memory access
Diffstat (limited to 'src/dhcpv6-ia.c')
| -rw-r--r-- | src/dhcpv6-ia.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c index de44581..1476e02 100644 --- a/src/dhcpv6-ia.c +++ b/src/dhcpv6-ia.c @@ -596,7 +596,10 @@ static void update(struct interface *iface) } struct dhcpv6_assignment *border = list_last_entry(&iface->ia_assignments, struct dhcpv6_assignment, head); - border->assigned = 1 << (64 - minprefix); + if (minprefix <= 32 || minprefix > 64) + border->assigned = 1U << (64 - minprefix); + else + border->assigned = 0; bool change = len != (int)iface->ia_addr_len; for (int i = 0; !change && i < len; ++i) |