| // BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his |
| // https://syzkaller.appspot.com/bug?id=9f27e880d757d8e1b7bebd36a4c391fccb92f134 |
| // status:dup |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <linux/futex.h> |
| #include <pthread.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| #define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) |
| |
| #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ |
| (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) |
| |
| #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ |
| if ((bf_off) == 0 && (bf_len) == 0) { \ |
| *(type*)(addr) = (type)(val); \ |
| } else { \ |
| type new_val = *(type*)(addr); \ |
| new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ |
| new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ |
| *(type*)(addr) = new_val; \ |
| } |
| |
| struct csum_inet { |
| uint32_t acc; |
| }; |
| |
| static void csum_inet_init(struct csum_inet* csum) |
| { |
| csum->acc = 0; |
| } |
| |
| static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, |
| size_t length) |
| { |
| if (length == 0) |
| return; |
| |
| size_t i; |
| for (i = 0; i < length - 1; i += 2) |
| csum->acc += *(uint16_t*)&data[i]; |
| |
| if (length & 1) |
| csum->acc += (uint16_t)data[length - 1]; |
| |
| while (csum->acc > 0xffff) |
| csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); |
| } |
| |
| static uint16_t csum_inet_digest(struct csum_inet* csum) |
| { |
| return ~csum->acc; |
| } |
| |
| 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 int collide; |
| |
| 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); |
| if (collide && call % 2) |
| break; |
| 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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 0xa, 6, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| *(uint16_t*)0x20000340 = 0xa; |
| *(uint16_t*)0x20000342 = htobe16(0x4e20); |
| *(uint32_t*)0x20000344 = 6; |
| *(uint8_t*)0x20000348 = 0; |
| *(uint8_t*)0x20000349 = 0; |
| *(uint8_t*)0x2000034a = 0; |
| *(uint8_t*)0x2000034b = 0; |
| *(uint8_t*)0x2000034c = 0; |
| *(uint8_t*)0x2000034d = 0; |
| *(uint8_t*)0x2000034e = 0; |
| *(uint8_t*)0x2000034f = 0; |
| *(uint8_t*)0x20000350 = 0; |
| *(uint8_t*)0x20000351 = 0; |
| *(uint8_t*)0x20000352 = 0; |
| *(uint8_t*)0x20000353 = 0; |
| *(uint8_t*)0x20000354 = 0; |
| *(uint8_t*)0x20000355 = 0; |
| *(uint8_t*)0x20000356 = 0; |
| *(uint8_t*)0x20000357 = 0; |
| *(uint32_t*)0x20000358 = 0xfffffffc; |
| syscall(__NR_bind, r[0], 0x20000340, 0x1c); |
| break; |
| case 2: |
| res = syscall(__NR_socket, 2, 6, 0); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 3: |
| syscall(__NR_listen, r[0], 6); |
| break; |
| case 4: |
| memcpy((void*)0x20000080, "\x03", 1); |
| syscall(__NR_setsockopt, r[1], 0x10d, 0xd, 0x20000080, 1); |
| break; |
| case 5: |
| *(uint16_t*)0x20e5c000 = 2; |
| *(uint16_t*)0x20e5c002 = htobe16(0x4e20); |
| *(uint32_t*)0x20e5c004 = htobe32(0x7f000001); |
| *(uint8_t*)0x20e5c008 = 0; |
| *(uint8_t*)0x20e5c009 = 0; |
| *(uint8_t*)0x20e5c00a = 0; |
| *(uint8_t*)0x20e5c00b = 0; |
| *(uint8_t*)0x20e5c00c = 0; |
| *(uint8_t*)0x20e5c00d = 0; |
| *(uint8_t*)0x20e5c00e = 0; |
| *(uint8_t*)0x20e5c00f = 0; |
| syscall(__NR_connect, r[1], 0x20e5c000, 0x10); |
| break; |
| case 6: |
| *(uint32_t*)0x20000040 = 0x80; |
| res = syscall(__NR_accept, r[0], 0x20000240, 0x20000040); |
| if (res != -1) |
| r[2] = res; |
| break; |
| case 7: |
| *(uint64_t*)0x20000800 = 0x20000380; |
| *(uint16_t*)0x20000380 = 1; |
| *(uint8_t*)0x20000382 = 0; |
| *(uint32_t*)0x20000384 = 0x4e21; |
| *(uint32_t*)0x20000808 = 0x6e; |
| *(uint64_t*)0x20000810 = 0x20000740; |
| *(uint64_t*)0x20000740 = 0x20000400; |
| *(uint64_t*)0x20000748 = 0; |
| *(uint64_t*)0x20000750 = 0x20000500; |
| *(uint64_t*)0x20000758 = 0; |
| *(uint64_t*)0x20000760 = 0x200006c0; |
| memcpy((void*)0x200006c0, |
| "\x70\x7c\x28\x7f\x30\xba\x64\x2d\x38\xf7\xa6\x7c\x0d\xb8\x0c\x5f" |
| "\xd1\x4b\x3a\x11\x7d\xbf\xc1\x45\xe1\xa0\xd0\x1f\xa6\xb2\x18\x56" |
| "\xfb\x64\x70\x57\xe1\x8b\xda\xa6\x43\x75\xa4\xb5\x71\x1c\x00\x43" |
| "\x05\xb0\x82\x29\x38\x59\xec\xe3\x6b\x0d\x8b\x5b\x79\xdc\xf9\x60" |
| "\xfb\xfe\xa5\x14\x72\x7a\x06\xf1\x61\x0c\x85\xf3\x42\xda\x61", |
| 79); |
| *(uint64_t*)0x20000768 = 0x4f; |
| *(uint64_t*)0x20000818 = 3; |
| *(uint64_t*)0x20000820 = 0x200007c0; |
| *(uint64_t*)0x20000828 = 0; |
| *(uint32_t*)0x20000830 = 0x8000; |
| syscall(__NR_sendmmsg, r[2], 0x20000800, 1, 0x8000); |
| break; |
| case 8: |
| *(uint64_t*)0x20000200 = 0x200000c0; |
| *(uint16_t*)0x200000c0 = 0x10; |
| *(uint16_t*)0x200000c2 = 0; |
| *(uint32_t*)0x200000c4 = 0; |
| *(uint32_t*)0x200000c8 = 0; |
| *(uint32_t*)0x20000208 = 0xc; |
| *(uint64_t*)0x20000210 = 0x200001c0; |
| *(uint64_t*)0x200001c0 = 0x20001840; |
| *(uint64_t*)0x200001c8 = 1; |
| *(uint64_t*)0x20000218 = 1; |
| *(uint64_t*)0x20000220 = 0; |
| *(uint64_t*)0x20000228 = 0; |
| *(uint32_t*)0x20000230 = 0; |
| syscall(__NR_sendmsg, r[2], 0x20000200, 0); |
| break; |
| case 9: |
| *(uint64_t*)0x20000600 = 0x20000300; |
| *(uint16_t*)0x20000300 = 0x10; |
| *(uint16_t*)0x20000302 = 0; |
| *(uint32_t*)0x20000304 = 0; |
| *(uint32_t*)0x20000308 = 0x40000002; |
| *(uint32_t*)0x20000608 = 0xc; |
| *(uint64_t*)0x20000610 = 0x200005c0; |
| *(uint64_t*)0x200005c0 = 0x200004c0; |
| *(uint32_t*)0x200004c0 = 0x14; |
| *(uint16_t*)0x200004c4 = 0; |
| *(uint16_t*)0x200004c6 = 0x908; |
| *(uint32_t*)0x200004c8 = 0x70bd2c; |
| *(uint32_t*)0x200004cc = 0x25dfdbfb; |
| *(uint8_t*)0x200004d0 = 3; |
| *(uint8_t*)0x200004d1 = 0; |
| *(uint16_t*)0x200004d2 = 0; |
| *(uint64_t*)0x200005c8 = 0x14; |
| *(uint64_t*)0x20000618 = 1; |
| *(uint64_t*)0x20000620 = 0; |
| *(uint64_t*)0x20000628 = 0; |
| *(uint32_t*)0x20000630 = 0xb167f2fa; |
| syscall(__NR_sendmsg, r[1], 0x20000600, 0x4000); |
| break; |
| case 10: |
| *(uint8_t*)0x20000040 = 0xaa; |
| *(uint8_t*)0x20000041 = 0xaa; |
| *(uint8_t*)0x20000042 = 0xaa; |
| *(uint8_t*)0x20000043 = 0xaa; |
| *(uint8_t*)0x20000044 = 0xaa; |
| *(uint8_t*)0x20000045 = 0xaa; |
| *(uint8_t*)0x20000046 = -1; |
| *(uint8_t*)0x20000047 = -1; |
| *(uint8_t*)0x20000048 = -1; |
| *(uint8_t*)0x20000049 = -1; |
| *(uint8_t*)0x2000004a = -1; |
| *(uint8_t*)0x2000004b = -1; |
| *(uint16_t*)0x2000004c = htobe16(0x800); |
| STORE_BY_BITMASK(uint8_t, 0x2000004e, 7, 0, 4); |
| STORE_BY_BITMASK(uint8_t, 0x2000004e, 4, 4, 4); |
| STORE_BY_BITMASK(uint8_t, 0x2000004f, 0, 0, 2); |
| STORE_BY_BITMASK(uint8_t, 0x2000004f, 0, 2, 6); |
| *(uint16_t*)0x20000050 = htobe16(0x30); |
| *(uint16_t*)0x20000052 = htobe16(0); |
| *(uint16_t*)0x20000054 = htobe16(0); |
| *(uint8_t*)0x20000056 = 0; |
| *(uint8_t*)0x20000057 = 0; |
| *(uint16_t*)0x20000058 = 0; |
| *(uint8_t*)0x2000005a = 0xac; |
| *(uint8_t*)0x2000005b = 0x14; |
| *(uint8_t*)0x2000005c = 0x14; |
| *(uint8_t*)0x2000005d = 0xbb; |
| *(uint8_t*)0x2000005e = 0xac; |
| *(uint8_t*)0x2000005f = 0x23; |
| *(uint8_t*)0x20000060 = 0x14; |
| *(uint8_t*)0x20000061 = 0xaa; |
| *(uint8_t*)0x20000062 = 7; |
| *(uint8_t*)0x20000063 = 7; |
| *(uint8_t*)0x20000064 = 4; |
| *(uint32_t*)0x20000065 = htobe32(0); |
| *(uint16_t*)0x2000006a = htobe16(0); |
| *(uint16_t*)0x2000006c = htobe16(0); |
| *(uint32_t*)0x2000006e = 0x41424344; |
| *(uint32_t*)0x20000072 = 0x41424344; |
| STORE_BY_BITMASK(uint8_t, 0x20000076, 0, 0, 1); |
| STORE_BY_BITMASK(uint8_t, 0x20000076, 0, 1, 3); |
| STORE_BY_BITMASK(uint8_t, 0x20000076, 5, 4, 4); |
| *(uint8_t*)0x20000077 = 0; |
| *(uint16_t*)0x20000078 = htobe16(0); |
| *(uint16_t*)0x2000007a = 0; |
| *(uint16_t*)0x2000007c = htobe16(0); |
| *(uint32_t*)0x20000000 = 0; |
| *(uint32_t*)0x20000004 = 0; |
| *(uint32_t*)0x20000008 = 0; |
| *(uint32_t*)0x2000000c = 0; |
| *(uint32_t*)0x20000010 = 0; |
| *(uint32_t*)0x20000014 = 0; |
| struct csum_inet csum_1; |
| csum_inet_init(&csum_1); |
| csum_inet_update(&csum_1, (const uint8_t*)0x2000005a, 4); |
| csum_inet_update(&csum_1, (const uint8_t*)0x2000005e, 4); |
| uint16_t csum_1_chunk_2 = 0x600; |
| csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 2); |
| uint16_t csum_1_chunk_3 = 0x1400; |
| csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 2); |
| csum_inet_update(&csum_1, (const uint8_t*)0x2000006a, 20); |
| *(uint16_t*)0x2000007a = csum_inet_digest(&csum_1); |
| struct csum_inet csum_2; |
| csum_inet_init(&csum_2); |
| csum_inet_update(&csum_2, (const uint8_t*)0x2000004e, 28); |
| *(uint16_t*)0x20000058 = csum_inet_digest(&csum_2); |
| break; |
| } |
| } |
| |
| void loop() |
| { |
| execute(11); |
| collide = 1; |
| execute(11); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |
