| // KASAN: use-after-free Read in tcp_connect |
| // https://syzkaller.appspot.com/bug?id=28f3c6f048653756fa6d137e67309ad83c7f2fde |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <arpa/inet.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <linux/futex.h> |
| #include <linux/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_tun.h> |
| #include <linux/ip.h> |
| #include <linux/tcp.h> |
| #include <net/if_arp.h> |
| #include <pthread.h> |
| #include <sched.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdlib.h> |
| #include <sys/ioctl.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/uio.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.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 void vsnprintf_check(char* str, size_t size, const char* format, |
| va_list args) |
| { |
| int rv; |
| |
| rv = vsnprintf(str, size, format, args); |
| if (rv < 0) |
| fail("tun: snprintf failed"); |
| if ((size_t)rv >= size) |
| fail("tun: string '%s...' doesn't fit into buffer", str); |
| } |
| |
| #define COMMAND_MAX_LEN 128 |
| #define PATH_PREFIX \ |
| "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin " |
| #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1) |
| |
| static void execute_command(bool panic, const char* format, ...) |
| { |
| va_list args; |
| char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN]; |
| int rv; |
| |
| va_start(args, format); |
| memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN); |
| vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args); |
| va_end(args); |
| rv = system(command); |
| if (rv) { |
| if (panic) |
| fail("command '%s' failed: %d", &command[0], rv); |
| } |
| } |
| |
| #define DEV_IPV4 "172.20.20.%d" |
| #define DEV_IPV6 "fe80::%02hx" |
| #define DEV_MAC "aa:aa:aa:aa:aa:%02hx" |
| |
| static void snprintf_check(char* str, size_t size, const char* format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| vsnprintf_check(str, size, format, args); |
| va_end(args); |
| } |
| |
| static void initialize_netdevices(void) |
| { |
| unsigned i; |
| const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"}; |
| const char* devnames[] = {"lo", |
| "sit0", |
| "bridge0", |
| "vcan0", |
| "tunl0", |
| "gre0", |
| "gretap0", |
| "ip_vti0", |
| "ip6_vti0", |
| "ip6tnl0", |
| "ip6gre0", |
| "ip6gretap0", |
| "erspan0", |
| "bond0", |
| "veth0", |
| "veth1", |
| "team0", |
| "veth0_to_bridge", |
| "veth1_to_bridge", |
| "veth0_to_bond", |
| "veth1_to_bond", |
| "veth0_to_team", |
| "veth1_to_team"}; |
| const char* devmasters[] = {"bridge", "bond", "team"}; |
| |
| for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++) |
| execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]); |
| execute_command(0, "ip link add type veth"); |
| |
| for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) { |
| execute_command( |
| 0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s", |
| devmasters[i], devmasters[i]); |
| execute_command( |
| 0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s", |
| devmasters[i], devmasters[i]); |
| execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i], |
| devmasters[i]); |
| execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i], |
| devmasters[i]); |
| execute_command(0, "ip link set veth0_to_%s up", devmasters[i]); |
| execute_command(0, "ip link set veth1_to_%s up", devmasters[i]); |
| } |
| execute_command(0, "ip link set bridge_slave_0 up"); |
| execute_command(0, "ip link set bridge_slave_1 up"); |
| |
| for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) { |
| char addr[32]; |
| snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10); |
| execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]); |
| snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10); |
| execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]); |
| snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10); |
| execute_command(0, "ip link set dev %s address %s", devnames[i], addr); |
| execute_command(0, "ip link set dev %s up", devnames[i]); |
| } |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| |
| struct rlimit rlim; |
| rlim.rlim_cur = rlim.rlim_max = 160 << 20; |
| setrlimit(RLIMIT_AS, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 8 << 20; |
| setrlimit(RLIMIT_MEMLOCK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 136 << 20; |
| setrlimit(RLIMIT_FSIZE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_STACK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 0; |
| setrlimit(RLIMIT_CORE, &rlim); |
| |
| if (unshare(CLONE_NEWNS)) { |
| } |
| if (unshare(CLONE_NEWIPC)) { |
| } |
| if (unshare(0x02000000)) { |
| } |
| if (unshare(CLONE_NEWUTS)) { |
| } |
| if (unshare(CLONE_SYSVSEM)) { |
| } |
| } |
| |
| static int do_sandbox_none(void) |
| { |
| if (unshare(CLONE_NEWPID)) { |
| } |
| int pid = fork(); |
| if (pid < 0) |
| fail("sandbox fork failed"); |
| if (pid) |
| return pid; |
| |
| sandbox_common(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_netdevices(); |
| loop(); |
| doexit(1); |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| void loop() |
| { |
| while (1) { |
| execute_one(); |
| } |
| } |
| |
| struct thread_t { |
| int created, running, call; |
| pthread_t th; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| } |
| return 0; |
| } |
| |
| static void execute(int num_calls) |
| { |
| int call, thread; |
| running = 0; |
| for (call = 0; call < num_calls; call++) { |
| for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| pthread_create(&th->th, &attr, thr, th); |
| } |
| if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) { |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| struct timespec ts; |
| ts.tv_sec = 0; |
| ts.tv_nsec = 20 * 1000 * 1000; |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); |
| if (running) |
| usleep((call == num_calls - 1) ? 10000 : 1000); |
| break; |
| } |
| } |
| } |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 2, 1, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| *(uint16_t*)0x20516ff0 = 2; |
| *(uint16_t*)0x20516ff2 = htobe16(0x4e21); |
| *(uint32_t*)0x20516ff4 = htobe32(0xe0000001); |
| *(uint8_t*)0x20516ff8 = 0; |
| *(uint8_t*)0x20516ff9 = 0; |
| *(uint8_t*)0x20516ffa = 0; |
| *(uint8_t*)0x20516ffb = 0; |
| *(uint8_t*)0x20516ffc = 0; |
| *(uint8_t*)0x20516ffd = 0; |
| *(uint8_t*)0x20516ffe = 0; |
| *(uint8_t*)0x20516fff = 0; |
| syscall(__NR_bind, r[0], 0x20516ff0, 0x10); |
| break; |
| case 2: |
| *(uint16_t*)0x20385ff0 = 2; |
| *(uint16_t*)0x20385ff2 = htobe16(0x4e21); |
| *(uint32_t*)0x20385ff4 = htobe32(0x7f000001); |
| *(uint8_t*)0x20385ff8 = 0; |
| *(uint8_t*)0x20385ff9 = 0; |
| *(uint8_t*)0x20385ffa = 0; |
| *(uint8_t*)0x20385ffb = 0; |
| *(uint8_t*)0x20385ffc = 0; |
| *(uint8_t*)0x20385ffd = 0; |
| *(uint8_t*)0x20385ffe = 0; |
| *(uint8_t*)0x20385fff = 0; |
| syscall(__NR_sendto, r[0], 0x20588fff, 0xfffffffffffffe98, 0x20020003, |
| 0x20385ff0, 0x10); |
| break; |
| case 3: |
| *(uint64_t*)0x20000c40 = 0x200001c0; |
| *(uint16_t*)0x200001c0 = 0x27; |
| *(uint32_t*)0x200001c4 = 0; |
| *(uint32_t*)0x200001c8 = 0; |
| *(uint32_t*)0x200001cc = 1; |
| *(uint8_t*)0x200001d0 = 5; |
| *(uint8_t*)0x200001d1 = 3; |
| memcpy((void*)0x200001d2, |
| "\x30\xd0\x6e\x99\x73\x45\xfe\x1a\xa8\x8c\x3f\xaf\x19\x5a\x6b\x38" |
| "\xe7\xac\xa6\x72\x8d\xb1\xf5\x74\xf1\x45\xde\x08\x18\xc3\x04\x42" |
| "\xf3\x30\x81\xc3\xd4\xc9\x3b\x0e\x88\x4e\xd4\xd3\xe0\x7c\x1a\xae" |
| "\xfc\xd8\x64\xb1\xc9\xac\x05\xf7\x27\xa0\x68\x2d\x25\xe9\x31", |
| 63); |
| *(uint64_t*)0x20000218 = 0xb; |
| *(uint32_t*)0x20000c48 = 0x60; |
| *(uint64_t*)0x20000c50 = 0x20000440; |
| *(uint64_t*)0x20000440 = 0x20000240; |
| *(uint64_t*)0x20000448 = 0; |
| *(uint64_t*)0x20000450 = 0x20000280; |
| *(uint64_t*)0x20000458 = 0; |
| *(uint64_t*)0x20000460 = 0x20000380; |
| memcpy((void*)0x20000380, |
| "\xb8\xe4\x1c\x20\xe7\x6b\x2b\xaa\xde\xdd\x2f\x51\xe8\x7f\x23\xb1" |
| "\x31\x7f\x4e\xaa\x19\xc0\x4c\xc9\x8a\x9a\xf3\x27\xe4\x22\x9a\xf5" |
| "\xcf\xe3\x16\x84\x01\x5a\x58\xcc\xcc\x42\xb3\xed\xb4\x3c\x97\xe0" |
| "\x4d\x5f\xa0\x0f\x21\x2b\xd7\x07\x31\xa3\x07\x44\x4d\x13\xfc\x02" |
| "\xcf\xba\x9f\x8c\x5e\x4d\xf8\x23\xcc\x3f\x61\x08\xb1\x3b\xe0\xcd" |
| "\x7d\x7e\x20\xe0\x1f\xc4\x8f\x01\xff\x89\xa4\x6f\xea\x9a\x5c\x66" |
| "\x6a\xd1\x98\xc3\xd2\xec\xae\x53\xc1\x6a\x53\x96\x84\xa2\x85\x45" |
| "\xa4\xa4\x0b\x74\x3d\x2d\xd7\x82\x33\x8a\x8e\x46\x80\xcb\x91\xe1" |
| "\x37\x86\x3e\x45\x92\xc2\x8a\xc7\xb8\xfd\x76\x8f\xf9\x4e\xcf\xa6" |
| "\x49\xbb\x97\xc9\x35\xac\x0c\xca\x76\x9f\x4c\x80\xfd\x9f", |
| 158); |
| *(uint64_t*)0x20000468 = 0x9e; |
| *(uint64_t*)0x20000c58 = 3; |
| *(uint64_t*)0x20000c60 = 0x20000480; |
| *(uint64_t*)0x20000480 = 0x10; |
| *(uint32_t*)0x20000488 = 0; |
| *(uint32_t*)0x2000048c = 5; |
| *(uint64_t*)0x20000c68 = 0x10; |
| *(uint32_t*)0x20000c70 = 0x40; |
| *(uint64_t*)0x20000c78 = 0x200004c0; |
| *(uint16_t*)0x200004c0 = 0x27; |
| *(uint32_t*)0x200004c4 = 1; |
| *(uint32_t*)0x200004c8 = 0; |
| *(uint32_t*)0x200004cc = 2; |
| *(uint8_t*)0x200004d0 = 1; |
| *(uint8_t*)0x200004d1 = 5; |
| memcpy((void*)0x200004d2, |
| "\xd1\xff\xb6\x1d\x3b\x31\x55\xb4\xf9\x3c\xb7\x1c\x25\xa7\x3a\x18" |
| "\x14\x5e\xdc\x68\x0e\xcb\x4a\xc3\x6b\xb8\x47\x02\xa8\x47\xa3\x9a" |
| "\x7d\x8f\xbb\xb2\x0d\xf2\x4b\x2c\x0e\x4a\xb9\xbb\x32\x20\x7b\x2f" |
| "\xcf\x5f\x23\x97\xc6\xba\x5b\x50\x37\xce\x3d\xa1\x59\x5b\x4a", |
| 63); |
| *(uint64_t*)0x20000518 = 0x30; |
| *(uint32_t*)0x20000c80 = 0x60; |
| *(uint64_t*)0x20000c88 = 0x20000640; |
| *(uint64_t*)0x20000640 = 0x20000540; |
| *(uint64_t*)0x20000648 = 0; |
| *(uint64_t*)0x20000650 = 0x20000600; |
| *(uint64_t*)0x20000658 = 0; |
| *(uint64_t*)0x20000c90 = 2; |
| *(uint64_t*)0x20000c98 = 0x20000680; |
| *(uint64_t*)0x20000680 = 0x10; |
| *(uint32_t*)0x20000688 = 0; |
| *(uint32_t*)0x2000068c = 0xffffeb95; |
| *(uint64_t*)0x20000ca0 = 0x10; |
| *(uint32_t*)0x20000ca8 = 1; |
| *(uint64_t*)0x20000cb0 = 0x20000740; |
| *(uint16_t*)0x20000740 = 0x27; |
| *(uint32_t*)0x20000744 = 0; |
| *(uint32_t*)0x20000748 = 0; |
| *(uint32_t*)0x2000074c = 3; |
| *(uint8_t*)0x20000750 = -1; |
| *(uint8_t*)0x20000751 = 0; |
| memcpy((void*)0x20000752, |
| "\xfd\x4b\xca\xea\x7b\xec\x9c\xe1\xb0\xf2\x1f\xa8\x16\x60\x7b\x2d" |
| "\x64\xd0\x55\x32\x6e\x6d\x83\xe6\xc0\x33\xc1\x14\x88\x8a\xa0\xe3" |
| "\xbb\xdf\x0b\x80\x4b\xd4\x18\x32\x5a\xfb\xe3\x40\x28\xf4\x01\xe6" |
| "\x3d\xac\x21\xdb\xe8\x97\xad\xc5\x03\xc4\x62\xba\x2b\xde\x69", |
| 63); |
| *(uint64_t*)0x20000798 = 0x2a; |
| *(uint32_t*)0x20000cb8 = 0x60; |
| *(uint64_t*)0x20000cc0 = 0x20000980; |
| *(uint64_t*)0x20000980 = 0x200007c0; |
| *(uint64_t*)0x20000988 = 0; |
| *(uint64_t*)0x20000990 = 0x20000880; |
| *(uint64_t*)0x20000998 = 0; |
| *(uint64_t*)0x20000cc8 = 2; |
| *(uint64_t*)0x20000cd0 = 0; |
| *(uint64_t*)0x20000cd8 = 0; |
| *(uint32_t*)0x20000ce0 = 0; |
| *(uint64_t*)0x20000ce8 = 0x200009c0; |
| *(uint16_t*)0x200009c0 = 0x27; |
| *(uint32_t*)0x200009c4 = 1; |
| *(uint32_t*)0x200009c8 = 0; |
| *(uint32_t*)0x200009cc = 4; |
| *(uint8_t*)0x200009d0 = 3; |
| *(uint8_t*)0x200009d1 = 0x13; |
| memcpy((void*)0x200009d2, |
| "\xe6\xcd\xff\x1d\xa7\xe0\x10\xef\x3c\x1a\x9d\xfb\x17\xa3\x6e\xdd" |
| "\xe1\xc5\xdc\x81\x26\xfa\xbc\xde\x96\x94\xed\x46\x56\x6c\xfc\x1e" |
| "\x3e\xb5\xa6\xad\xae\x12\x44\xed\x17\x55\x0e\xdf\xd8\x4e\x57\x9b" |
| "\x52\x3e\x93\x0b\x7f\xc9\xbd\xb8\x9d\xae\x43\xf5\x8c\x63\x45", |
| 63); |
| *(uint64_t*)0x20000a18 = 0x15; |
| *(uint32_t*)0x20000cf0 = 0x60; |
| *(uint64_t*)0x20000cf8 = 0x20000bc0; |
| *(uint64_t*)0x20000bc0 = 0x20000a40; |
| *(uint64_t*)0x20000bc8 = 0; |
| *(uint64_t*)0x20000bd0 = 0x20000ac0; |
| *(uint64_t*)0x20000bd8 = 0; |
| *(uint64_t*)0x20000be0 = 0x20000b40; |
| *(uint64_t*)0x20000be8 = 0; |
| *(uint64_t*)0x20000d00 = 3; |
| *(uint64_t*)0x20000d08 = 0x20000c00; |
| *(uint64_t*)0x20000c00 = 0x10; |
| *(uint32_t*)0x20000c08 = 0x112; |
| *(uint32_t*)0x20000c0c = 0x7a4; |
| *(uint64_t*)0x20000d10 = 0x10; |
| *(uint32_t*)0x20000d18 = 0x84; |
| syscall(__NR_sendmmsg, r[0], 0x20000c40, 4, 0x8000); |
| break; |
| case 4: |
| *(uint16_t*)0x203cd000 = 0; |
| *(uint8_t*)0x203cd002 = 0; |
| *(uint8_t*)0x203cd003 = 0; |
| *(uint8_t*)0x203cd004 = 0; |
| *(uint8_t*)0x203cd005 = 0; |
| *(uint8_t*)0x203cd006 = 0; |
| *(uint8_t*)0x203cd007 = 0; |
| syscall(__NR_connect, r[0], 0x203cd000, 0x10); |
| break; |
| case 5: |
| *(uint16_t*)0x20000000 = 2; |
| *(uint16_t*)0x20000002 = htobe16(0); |
| *(uint8_t*)0x20000004 = 0xac; |
| *(uint8_t*)0x20000005 = 0x14; |
| *(uint8_t*)0x20000006 = 0x14; |
| *(uint8_t*)0x20000007 = 0xbb; |
| *(uint8_t*)0x20000008 = 0; |
| *(uint8_t*)0x20000009 = 0; |
| *(uint8_t*)0x2000000a = 0; |
| *(uint8_t*)0x2000000b = 0; |
| *(uint8_t*)0x2000000c = 0; |
| *(uint8_t*)0x2000000d = 0; |
| *(uint8_t*)0x2000000e = 0; |
| *(uint8_t*)0x2000000f = 0; |
| syscall(__NR_connect, r[0], 0x20000000, 0x10); |
| break; |
| } |
| } |
| |
| void execute_one() |
| { |
| execute(6); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (;;) { |
| int pid = do_sandbox_none(); |
| int status = 0; |
| while (waitpid(pid, &status, __WALL) != pid) { |
| } |
| } |
| } |
