diff options
Diffstat (limited to 'executor/common_linux.h')
| -rw-r--r-- | executor/common_linux.h | 83 |
1 files changed, 41 insertions, 42 deletions
diff --git a/executor/common_linux.h b/executor/common_linux.h index 93ecef654..6b5fcad71 100644 --- a/executor/common_linux.h +++ b/executor/common_linux.h @@ -1106,25 +1106,19 @@ static void initialize_wifi_devices(void) return; #endif int rfkill = open("/dev/rfkill", O_RDWR); - if (rfkill == -1) { - if (errno != ENOENT && errno != EACCES) - fail("open(/dev/rfkill) failed"); - } else { - struct rfkill_event event = {0}; - event.type = RFKILL_TYPE_ALL; - event.op = RFKILL_OP_CHANGE_ALL; - if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event))) - fail("write(/dev/rfkill) failed"); - close(rfkill); - } + if (rfkill == -1) + fail("open(/dev/rfkill) failed"); + struct rfkill_event event = {0}; + event.type = RFKILL_TYPE_ALL; + event.op = RFKILL_OP_CHANGE_ALL; + if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event))) + fail("write(/dev/rfkill) failed"); + close(rfkill); uint8 mac_addr[6] = WIFI_MAC_BASE; int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); - if (sock < 0) { - debug("initialize_wifi_devices: failed to create socket (%d)\n", errno); - return; - } - + if (sock < 0) + fail("initialize_wifi_devices: failed to create socket"); int hwsim_family_id = netlink_query_family_id(&nlmsg, sock, "MAC80211_HWSIM", true); int nl80211_family_id = netlink_query_family_id(&nlmsg, sock, "nl80211", true); uint8 ssid[] = WIFI_IBSS_SSID; @@ -1467,20 +1461,16 @@ static void netlink_nicvf_setup(void) sprintf(cmdline, "nsenter -t 1 -n ip link set %s netns %d", vf_intf.pass_thru_intf, getpid()); if (runcmdline(cmdline)) - return; - + failmsg("failed to run command", "%s", cmdline); sprintf(cmdline, "ip a s %s", vf_intf.pass_thru_intf); if (runcmdline(cmdline)) - return; - + failmsg("failed to run command", "%s", cmdline); sprintf(cmdline, "ip link set %s down", vf_intf.pass_thru_intf); if (runcmdline(cmdline)) - return; - + failmsg("failed to run command", "%s", cmdline); sprintf(cmdline, "ip link set %s name nicvf0", vf_intf.pass_thru_intf); if (runcmdline(cmdline)) - return; - + failmsg("failed to run command", "%s", cmdline); debug("nicvf0 VF pass-through setup complete.\n"); } #endif // SYZ_NIC_VF @@ -4849,6 +4839,16 @@ static void close_fds() static void setup_fault() { + int fd = open("/proc/self/make-it-fail", O_WRONLY); + if (fd == -1) + fail("CONFIG_FAULT_INJECTION is not enabled"); + close(fd); + + fd = open("/proc/thread-self/fail-nth", O_WRONLY); + if (fd == -1) + fail("kernel does not have systematic fault injection support"); + close(fd); + static struct { const char* file; const char* val; @@ -4884,6 +4884,12 @@ static void setup_fault() static void setup_leak() { + if (!write_file(KMEMLEAK_FILE, "scan=off")) { + if (errno == EBUSY) + fail("KMEMLEAK disabled: increase CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE" + " or unset CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF"); + fail("failed to write(kmemleak, \"scan=off\")"); + } // Flush boot leaks. if (!write_file(KMEMLEAK_FILE, "scan")) fail("failed to write(kmemleak, \"scan\")"); @@ -4983,8 +4989,9 @@ static void setup_binfmt_misc() if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) { debug("mount(binfmt_misc) failed: %d\n", errno); } - write_file("/proc/sys/fs/binfmt_misc/register", ":syz0:M:0:\x01::./file0:"); - write_file("/proc/sys/fs/binfmt_misc/register", ":syz1:M:1:\x02::./file0:POC"); + if (!write_file("/proc/sys/fs/binfmt_misc/register", ":syz0:M:0:\x01::./file0:") || + !write_file("/proc/sys/fs/binfmt_misc/register", ":syz1:M:1:\x02::./file0:POC")) + fail("write(/proc/sys/fs/binfmt_misc/register) failed"); } #endif @@ -4994,7 +5001,7 @@ static void setup_binfmt_misc() static void setup_kcsan() { if (!write_file(KCSAN_DEBUGFS_FILE, "on")) - fail("failed to enable KCSAN"); + fail("write(/sys/kernel/debug/kcsan, on) failed"); } #if SYZ_EXECUTOR // currently only used by executor @@ -5122,18 +5129,16 @@ static void setup_802154() netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex)); netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr, sizeof(shortaddr)); int err = netlink_send(&nlmsg, sock_generic); - if (err < 0) { - debug("NL802154_CMD_SET_SHORT_ADDR failed: %s\n", strerror(errno)); - } + if (err < 0) + fail("NL802154_CMD_SET_SHORT_ADDR failed"); netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr, sizeof(hwaddr), 0); if (i == 0) { netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false); netlink_done(&nlmsg); netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); int err = netlink_send(&nlmsg, sock_route); - if (err < 0) { - debug("netlink: adding device lowpan0 type lowpan link wpan0: %s\n", strerror(errno)); - } + if (err < 0) + fail("netlink: adding device lowpan0 type lowpan link wpan0"); } } close(sock_route); @@ -5695,24 +5700,18 @@ static void setup_swap() unlink(SWAP_FILE); // Zero-fill the file. int fd = open(SWAP_FILE, O_CREAT | O_WRONLY | O_CLOEXEC, 0600); - if (fd == -1) { + if (fd == -1) failmsg("swap file open failed", "file: %s", SWAP_FILE); - return; - } // We cannot do ftruncate -- swapon complains about this. Do fallocate instead. fallocate(fd, FALLOC_FL_ZERO_RANGE, 0, SWAP_FILE_SIZE); close(fd); // Set up the swap file. char cmdline[64]; sprintf(cmdline, "mkswap %s", SWAP_FILE); - if (runcmdline(cmdline)) { + if (runcmdline(cmdline)) fail("mkswap failed"); - return; - } - if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1) { + if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1) failmsg("swapon failed", "file: %s", SWAP_FILE); - return; - } } #endif |