| // KASAN: slab-out-of-bounds Read in __dev_queue_xmit |
| // https://syzkaller.appspot.com/bug?id=26de18d686d17f002752e4cb8c4740087bb77a79 |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <string.h> |
| #include <sys/stat.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; |
| } |
| |
| static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2) |
| { |
| if (a0 == 0xc || a0 == 0xb) { |
| char buf[128]; |
| sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, |
| (uint8_t)a2); |
| return open(buf, O_RDWR, 0); |
| } else { |
| char buf[1024]; |
| char* hash; |
| strncpy(buf, (char*)a0, sizeof(buf)); |
| buf[sizeof(buf) - 1] = 0; |
| while ((hash = strchr(buf, '#'))) { |
| *hash = '0' + (char)(a1 % 10); |
| a1 /= 10; |
| } |
| return open(buf, a2, 0); |
| } |
| } |
| |
| long r[5]; |
| void loop() |
| { |
| memset(r, -1, sizeof(r)); |
| syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); |
| r[0] = syscall(__NR_socket, 2, 1, 0); |
| memcpy((void*)0x20641ff3, "/dev/net/tun", 13); |
| r[1] = syz_open_dev(0x20641ff3, 0, 0); |
| r[2] = syscall(__NR_fcntl, r[1], 0, r[1]); |
| r[3] = syscall(__NR_socket, 0x10002000000011, 0x8000000080003, 8); |
| *(uint8_t*)0x20927fd8 = 0x73; |
| *(uint8_t*)0x20927fd9 = 0x79; |
| *(uint8_t*)0x20927fda = 0x7a; |
| *(uint8_t*)0x20927fdb = 0x30; |
| *(uint8_t*)0x20927fdc = 0; |
| *(uint32_t*)0x20927fe8 = 5; |
| *(uint32_t*)0x20927fec = 0; |
| *(uint64_t*)0x20927ff0 = 0x20c15000; |
| *(uint32_t*)0x20c15000 = 0; |
| *(uint32_t*)0x20c15004 = 0; |
| *(uint16_t*)0x20c15008 = 0; |
| syscall(__NR_ioctl, r[1], 0x400454ca, 0x20927fd8); |
| *(uint8_t*)0x2062ffe0 = 0x73; |
| *(uint8_t*)0x2062ffe1 = 0x79; |
| *(uint8_t*)0x2062ffe2 = 0x7a; |
| *(uint8_t*)0x2062ffe3 = 0x30; |
| *(uint8_t*)0x2062ffe4 = 0; |
| *(uint16_t*)0x2062fff0 = 0x301; |
| syscall(__NR_ioctl, r[0], 0x8914, 0x2062ffe0); |
| *(uint32_t*)0x20113000 = 0x1000; |
| syscall(__NR_setsockopt, r[3], 0x107, 0xf, 0x20113000, 4); |
| *(uint8_t*)0x2086d000 = 0x73; |
| *(uint8_t*)0x2086d001 = 0x79; |
| *(uint8_t*)0x2086d002 = 0x7a; |
| *(uint8_t*)0x2086d003 = 0x30; |
| *(uint8_t*)0x2086d004 = 0; |
| *(uint32_t*)0x2086d010 = 0; |
| *(uint8_t*)0x2086d014 = 0; |
| *(uint8_t*)0x2086d015 = 0; |
| *(uint8_t*)0x2086d016 = 0; |
| *(uint8_t*)0x2086d017 = 0; |
| *(uint8_t*)0x2086d018 = 0; |
| *(uint8_t*)0x2086d019 = 0; |
| *(uint8_t*)0x2086d01a = 0; |
| *(uint8_t*)0x2086d01b = 0; |
| *(uint8_t*)0x2086d01c = 0; |
| *(uint8_t*)0x2086d01d = 0; |
| *(uint8_t*)0x2086d01e = 0; |
| *(uint8_t*)0x2086d01f = 0; |
| *(uint8_t*)0x2086d020 = 0; |
| *(uint8_t*)0x2086d021 = 0; |
| *(uint8_t*)0x2086d022 = 0; |
| *(uint8_t*)0x2086d023 = 0; |
| *(uint8_t*)0x2086d024 = 0; |
| *(uint8_t*)0x2086d025 = 0; |
| *(uint8_t*)0x2086d026 = 0; |
| *(uint8_t*)0x2086d027 = 0; |
| if (syscall(__NR_ioctl, r[3], 0x8933, 0x2086d000) != -1) |
| r[4] = *(uint32_t*)0x2086d010; |
| *(uint16_t*)0x20c85000 = 0x11; |
| *(uint16_t*)0x20c85002 = htobe16(0); |
| *(uint32_t*)0x20c85004 = r[4]; |
| *(uint16_t*)0x20c85008 = 1; |
| *(uint8_t*)0x20c8500a = 0; |
| *(uint8_t*)0x20c8500b = 6; |
| *(uint8_t*)0x20c8500c = 0xaa; |
| *(uint8_t*)0x20c8500d = 0xaa; |
| *(uint8_t*)0x20c8500e = 0xaa; |
| *(uint8_t*)0x20c8500f = 0xaa; |
| *(uint8_t*)0x20c85010 = 0xaa; |
| *(uint8_t*)0x20c85011 = 0; |
| *(uint8_t*)0x20c85012 = 0; |
| *(uint8_t*)0x20c85013 = 0; |
| syscall(__NR_bind, r[3], 0x20c85000, 0x14); |
| syscall(__NR_dup2, r[3], r[2]); |
| *(uint8_t*)0x20fecf2b = 0; |
| *(uint8_t*)0x20fecf2c = 1; |
| *(uint16_t*)0x20fecf2d = 0; |
| *(uint16_t*)0x20fecf2f = 8; |
| *(uint16_t*)0x20fecf31 = 0; |
| *(uint16_t*)0x20fecf33 = 0; |
| STORE_BY_BITMASK(uint8_t, 0x20fecf35, 5, 0, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf35, 4, 4, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf36, 0, 0, 2); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf36, 0, 2, 6); |
| *(uint16_t*)0x20fecf37 = htobe16(0xc4); |
| *(uint16_t*)0x20fecf39 = htobe16(0x64); |
| *(uint16_t*)0x20fecf3b = htobe16(0); |
| *(uint8_t*)0x20fecf3d = 0; |
| *(uint8_t*)0x20fecf3e = 0x29; |
| *(uint16_t*)0x20fecf3f = 0; |
| *(uint32_t*)0x20fecf41 = htobe32(0xe0000001); |
| *(uint8_t*)0x20fecf45 = 0xac; |
| *(uint8_t*)0x20fecf46 = 0x14; |
| *(uint8_t*)0x20fecf47 = 0; |
| *(uint8_t*)0x20fecf48 = 0xaa; |
| *(uint8_t*)0x20fecf49 = 5; |
| *(uint8_t*)0x20fecf4a = 1; |
| *(uint16_t*)0x20fecf4b = 0; |
| *(uint32_t*)0x20fecf4d = htobe32(0x7f000001); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf51, 0x2a, 0, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf51, 4, 4, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf52, 3, 0, 2); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf52, 0x43, 2, 6); |
| *(uint16_t*)0x20fecf53 = htobe16(1); |
| *(uint16_t*)0x20fecf55 = htobe16(0x65); |
| *(uint16_t*)0x20fecf57 = htobe16(6); |
| *(uint8_t*)0x20fecf59 = 9; |
| *(uint8_t*)0x20fecf5a = 0x89; |
| *(uint16_t*)0x20fecf5b = htobe16(0); |
| *(uint8_t*)0x20fecf5d = 0xac; |
| *(uint8_t*)0x20fecf5e = 0x14; |
| *(uint8_t*)0x20fecf5f = 0; |
| *(uint8_t*)0x20fecf60 = 0xaa; |
| *(uint32_t*)0x20fecf61 = htobe32(0x7f000001); |
| *(uint8_t*)0x20fecf65 = 0x44; |
| *(uint8_t*)0x20fecf66 = 0x10; |
| *(uint8_t*)0x20fecf67 = 0x4c; |
| STORE_BY_BITMASK(uint8_t, 0x20fecf68, 3, 0, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf68, 1, 4, 4); |
| *(uint32_t*)0x20fecf69 = htobe32(1); |
| *(uint32_t*)0x20fecf6d = htobe32(9); |
| *(uint32_t*)0x20fecf71 = htobe32(0xea41); |
| *(uint8_t*)0x20fecf75 = 1; |
| *(uint8_t*)0x20fecf76 = 0x44; |
| *(uint8_t*)0x20fecf77 = 0x44; |
| *(uint8_t*)0x20fecf78 = 8; |
| STORE_BY_BITMASK(uint8_t, 0x20fecf79, 0, 0, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecf79, -1, 4, 4); |
| *(uint32_t*)0x20fecf7a = htobe32(0x7f000001); |
| *(uint32_t*)0x20fecf7e = htobe32(3); |
| *(uint32_t*)0x20fecf82 = htobe32(0x7f000001); |
| *(uint32_t*)0x20fecf86 = htobe32(9); |
| *(uint32_t*)0x20fecf8a = htobe32(0xe0000002); |
| *(uint32_t*)0x20fecf8e = htobe32(3); |
| *(uint32_t*)0x20fecf92 = htobe32(0x7e4); |
| *(uint32_t*)0x20fecf96 = htobe32(0xe0000001); |
| *(uint32_t*)0x20fecf9a = htobe32(8); |
| *(uint32_t*)0x20fecf9e = htobe32(0); |
| *(uint32_t*)0x20fecfa2 = htobe32(0xbe400000); |
| *(uint32_t*)0x20fecfa6 = htobe32(0); |
| *(uint32_t*)0x20fecfaa = htobe32(3); |
| *(uint32_t*)0x20fecfae = htobe32(6); |
| *(uint8_t*)0x20fecfb2 = 0xac; |
| *(uint8_t*)0x20fecfb3 = 0x14; |
| *(uint8_t*)0x20fecfb4 = 0; |
| *(uint8_t*)0x20fecfb5 = 0xbb; |
| *(uint32_t*)0x20fecfb6 = htobe32(6); |
| *(uint8_t*)0x20fecfba = 0x89; |
| *(uint8_t*)0x20fecfbb = 7; |
| *(uint8_t*)0x20fecfbc = 0x81; |
| *(uint32_t*)0x20fecfbd = htobe32(4); |
| *(uint8_t*)0x20fecfc1 = 7; |
| *(uint8_t*)0x20fecfc2 = 0x13; |
| *(uint8_t*)0x20fecfc3 = 0xe1; |
| *(uint32_t*)0x20fecfc4 = htobe32(0); |
| *(uint32_t*)0x20fecfc8 = htobe32(0xe0000002); |
| *(uint32_t*)0x20fecfcc = htobe32(0x3f); |
| *(uint32_t*)0x20fecfd0 = htobe32(0); |
| *(uint8_t*)0x20fecfd4 = 0x44; |
| *(uint8_t*)0x20fecfd5 = 0x1c; |
| *(uint8_t*)0x20fecfd6 = 0; |
| STORE_BY_BITMASK(uint8_t, 0x20fecfd7, 3, 0, 4); |
| STORE_BY_BITMASK(uint8_t, 0x20fecfd7, 7, 4, 4); |
| *(uint32_t*)0x20fecfd8 = htobe32(0xe0000001); |
| *(uint32_t*)0x20fecfdc = htobe32(0x20); |
| *(uint32_t*)0x20fecfe0 = htobe32(0xe0000002); |
| *(uint32_t*)0x20fecfe4 = htobe32(1); |
| *(uint32_t*)0x20fecfe8 = htobe32(-1); |
| *(uint32_t*)0x20fecfec = htobe32(8); |
| *(uint8_t*)0x20fecff0 = 1; |
| *(uint8_t*)0x20fecff1 = 0x94; |
| *(uint8_t*)0x20fecff2 = 6; |
| *(uint32_t*)0x20fecff3 = htobe32(0x8000); |
| struct csum_inet csum_1; |
| csum_inet_init(&csum_1); |
| csum_inet_update(&csum_1, (const uint8_t*)0x20fecf49, 176); |
| *(uint16_t*)0x20fecf4b = csum_inet_digest(&csum_1); |
| struct csum_inet csum_2; |
| csum_inet_init(&csum_2); |
| csum_inet_update(&csum_2, (const uint8_t*)0x20fecf35, 20); |
| *(uint16_t*)0x20fecf3f = csum_inet_digest(&csum_2); |
| syscall(__NR_write, r[2], 0x20fecf2b, 0xce); |
| } |
| |
| int main() |
| { |
| loop(); |
| return 0; |
| } |
