| // WARNING in debug_print_object |
| // https://syzkaller.appspot.com/bug?id=b09bd19d17e71809113522fb02b184a48a787542 |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <linux/net.h> |
| #include <netinet/in.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <sys/prctl.h> |
| #include <sys/socket.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <stdint.h> |
| #include <string.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| static uint64_t current_time_ms() |
| { |
| struct timespec ts; |
| |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| fail("clock_gettime failed"); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| struct ipt_getinfo { |
| char name[32]; |
| unsigned int valid_hooks; |
| unsigned int hook_entry[5]; |
| unsigned int underflow[5]; |
| unsigned int num_entries; |
| unsigned int size; |
| }; |
| |
| struct ipt_get_entries { |
| char name[32]; |
| unsigned int size; |
| void* entrytable[1024 / sizeof(void*)]; |
| }; |
| |
| struct xt_counters { |
| uint64_t pcnt, bcnt; |
| }; |
| |
| struct ipt_replace { |
| char name[32]; |
| unsigned int valid_hooks; |
| unsigned int num_entries; |
| unsigned int size; |
| unsigned int hook_entry[5]; |
| unsigned int underflow[5]; |
| unsigned int num_counters; |
| struct xt_counters* counters; |
| char entrytable[1024]; |
| }; |
| |
| struct ipt_table_desc { |
| const char* name; |
| struct ipt_getinfo info; |
| struct ipt_get_entries entries; |
| struct ipt_replace replace; |
| struct xt_counters counters[10]; |
| }; |
| |
| static struct ipt_table_desc ipv4_tables[] = { |
| {.name = "filter"}, {.name = "nat"}, {.name = "mangle"}, |
| {.name = "raw"}, {.name = "security"}, |
| }; |
| |
| #define IPT_BASE_CTL 64 |
| #define IPT_SO_SET_REPLACE (IPT_BASE_CTL) |
| #define IPT_SO_GET_INFO (IPT_BASE_CTL) |
| #define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1) |
| |
| static void checkpoint_net_namespace(void) |
| { |
| socklen_t optlen; |
| unsigned i; |
| int fd; |
| |
| fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| if (fd == -1) |
| fail("socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)"); |
| for (i = 0; i < sizeof(ipv4_tables) / sizeof(ipv4_tables[0]); i++) { |
| struct ipt_table_desc* table = &ipv4_tables[i]; |
| strcpy(table->info.name, table->name); |
| strcpy(table->entries.name, table->name); |
| strcpy(table->replace.name, table->name); |
| optlen = sizeof(table->info); |
| if (getsockopt(fd, SOL_IP, IPT_SO_GET_INFO, &table->info, &optlen)) { |
| switch (errno) { |
| case EPERM: |
| case ENOENT: |
| case ENOPROTOOPT: |
| continue; |
| } |
| fail("getsockopt(IPT_SO_GET_INFO)"); |
| } |
| if (table->info.size > sizeof(table->entries.entrytable)) |
| fail("table size is too large: %u", table->info.size); |
| if (table->info.num_entries > |
| sizeof(table->counters) / sizeof(table->counters[0])) |
| fail("too many counters: %u", table->info.num_entries); |
| table->entries.size = table->info.size; |
| optlen = sizeof(table->entries) - sizeof(table->entries.entrytable) + |
| table->info.size; |
| if (getsockopt(fd, SOL_IP, IPT_SO_GET_ENTRIES, &table->entries, &optlen)) |
| fail("getsockopt(IPT_SO_GET_ENTRIES)"); |
| table->replace.valid_hooks = table->info.valid_hooks; |
| table->replace.num_entries = table->info.num_entries; |
| table->replace.counters = table->counters; |
| table->replace.size = table->info.size; |
| memcpy(table->replace.hook_entry, table->info.hook_entry, |
| sizeof(table->replace.hook_entry)); |
| memcpy(table->replace.underflow, table->info.underflow, |
| sizeof(table->replace.underflow)); |
| memcpy(table->replace.entrytable, table->entries.entrytable, |
| table->info.size); |
| } |
| close(fd); |
| } |
| |
| static void reset_net_namespace(void) |
| { |
| struct ipt_get_entries entries; |
| struct ipt_getinfo info; |
| socklen_t optlen; |
| unsigned i; |
| int fd; |
| |
| memset(&info, 0, sizeof(info)); |
| memset(&entries, 0, sizeof(entries)); |
| fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| if (fd == -1) |
| fail("socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)"); |
| for (i = 0; i < sizeof(ipv4_tables) / sizeof(ipv4_tables[0]); i++) { |
| struct ipt_table_desc* table = &ipv4_tables[i]; |
| if (table->info.valid_hooks == 0) |
| continue; |
| strcpy(info.name, table->name); |
| optlen = sizeof(info); |
| if (getsockopt(fd, SOL_IP, IPT_SO_GET_INFO, &info, &optlen)) |
| fail("getsockopt(IPT_SO_GET_INFO)"); |
| if (memcmp(&table->info, &info, sizeof(table->info)) == 0) { |
| strcpy(entries.name, table->name); |
| entries.size = table->info.size; |
| optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size; |
| if (getsockopt(fd, SOL_IP, IPT_SO_GET_ENTRIES, &entries, &optlen)) |
| fail("getsockopt(IPT_SO_GET_ENTRIES)"); |
| if (memcmp(&table->entries, &entries, optlen) == 0) |
| continue; |
| } |
| table->replace.num_counters = info.num_entries; |
| optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) + |
| table->replace.size; |
| if (setsockopt(fd, SOL_IP, IPT_SO_SET_REPLACE, &table->replace, optlen)) |
| fail("setsockopt(IPT_SO_SET_REPLACE)"); |
| } |
| close(fd); |
| } |
| |
| static void test(); |
| |
| void loop() |
| { |
| int iter; |
| checkpoint_net_namespace(); |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| fail("loop fork failed"); |
| if (pid == 0) { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| test(); |
| doexit(0); |
| } |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| int res = waitpid(-1, &status, __WALL | WNOHANG); |
| if (res == pid) |
| break; |
| usleep(1000); |
| if (current_time_ms() - start > 5 * 1000) { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| break; |
| } |
| } |
| reset_net_namespace(); |
| } |
| } |
| |
| long r[2]; |
| uint64_t procid; |
| void test() |
| { |
| memset(r, -1, sizeof(r)); |
| syscall(__NR_mmap, 0x20000000, 0xe7c000, 3, 0x32, -1, 0); |
| r[0] = syscall(__NR_socket, 0xa, 2, 0); |
| r[1] = syscall(__NR_socket, 0x18, 1, 1); |
| *(uint16_t*)0x20e77000 = 0x18; |
| *(uint32_t*)0x20e77002 = 1; |
| *(uint32_t*)0x20e77006 = 0; |
| *(uint32_t*)0x20e7700a = r[0]; |
| *(uint16_t*)0x20e7700e = 2; |
| *(uint16_t*)0x20e77010 = htobe16(0x4e22 + procid * 4); |
| *(uint32_t*)0x20e77012 = htobe32(0xfffffffe); |
| *(uint8_t*)0x20e77016 = 0; |
| *(uint8_t*)0x20e77017 = 0; |
| *(uint8_t*)0x20e77018 = 0; |
| *(uint8_t*)0x20e77019 = 0; |
| *(uint8_t*)0x20e7701a = 0; |
| *(uint8_t*)0x20e7701b = 0; |
| *(uint8_t*)0x20e7701c = 0; |
| *(uint8_t*)0x20e7701d = 0; |
| *(uint32_t*)0x20e7701e = 1; |
| *(uint32_t*)0x20e77022 = 0; |
| *(uint32_t*)0x20e77026 = 2; |
| *(uint32_t*)0x20e7702a = 0; |
| syscall(__NR_connect, r[1], 0x20e77000, 0x2e); |
| } |
| |
| int main() |
| { |
| for (procid = 0; procid < 8; procid++) { |
| if (fork() == 0) { |
| for (;;) { |
| loop(); |
| } |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |