diff options
Diffstat (limited to 'executor/common_linux.h')
| -rw-r--r-- | executor/common_linux.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/executor/common_linux.h b/executor/common_linux.h index de3744ad9..5528257ac 100644 --- a/executor/common_linux.h +++ b/executor/common_linux.h @@ -299,6 +299,28 @@ static void initialize_netdevices(void) execute_command(0, "ip link set dev %s up", devnames[i]); } } + +// Same as initialize_netdevices, but called in init net namespace. +static void initialize_netdevices_init(void) +{ +#if SYZ_EXECUTOR + if (!flag_enable_net_dev) + return; +#endif + // Note: syscall descriptions know these addresses. + // NETROM device, address 7 bytes (AX25_ADDR_LEN), see net/netrom/{af_netrom,nr_dev}.c + execute_command(0, "ip link set dev nr%d address bb:bb:bb:bb:bb:00:%02hx", procid, procid); + execute_command(0, "ip -4 addr add 172.30.00.%d/24 dev nr%d", procid + 1, procid); + execute_command(0, "ip -6 addr add fe88::00:%02hx/120 dev nr%d", procid + 1, procid); + execute_command(0, "ip link set dev nr%d up", procid); + // ROSE device, address 5 bytes (ROSE_ADDR_LEN), see net/rose/{af_rose,rose_dev}.c + execute_command(0, "ip link set dev rose%d address bb:bb:bb:01:%02hx", procid, procid); + execute_command(0, "ip -4 addr add 172.30.01.%d/24 dev rose%d", procid + 1, procid); + execute_command(0, "ip -6 addr add fe88::01:%02hx/120 dev rose%d", procid + 1, procid); + // We don't up because it crashes kernel: + // https://groups.google.com/d/msg/syzkaller/v-4B3zoBC-4/02SCKEzJBwAJ + // execute_command(0, "ip link set dev rose%d up", procid); +} #endif #if SYZ_EXECUTOR || SYZ_TUN_ENABLE && (__NR_syz_extract_tcp_res || SYZ_REPEAT) @@ -1570,6 +1592,9 @@ static int do_sandbox_none(void) setup_common(); sandbox_common(); +#if SYZ_EXECUTOR || SYZ_ENABLE_NETDEV + initialize_netdevices_init(); +#endif if (unshare(CLONE_NEWNET)) { debug("unshare(CLONE_NEWNET): %d\n", errno); } @@ -1601,6 +1626,9 @@ static int do_sandbox_setuid(void) setup_common(); sandbox_common(); +#if SYZ_EXECUTOR || SYZ_ENABLE_NETDEV + initialize_netdevices_init(); +#endif if (unshare(CLONE_NEWNET)) { debug("unshare(CLONE_NEWNET): %d\n", errno); } @@ -1650,6 +1678,9 @@ static int namespace_sandbox_proc(void* arg) if (!write_file("/proc/self/gid_map", "0 %d 1\n", real_gid)) fail("write of /proc/self/gid_map failed"); +#if SYZ_EXECUTOR || SYZ_ENABLE_NETDEV + initialize_netdevices_init(); +#endif // CLONE_NEWNET must always happen before tun setup, // because we want the tun device in the test namespace. if (unshare(CLONE_NEWNET)) |