// https://syzkaller.appspot.com/bug?id=acbc9b7c1070f50aed15b799fa954b7268ff0983 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #ifndef __NR_bpf #define __NR_bpf 321 #endif #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) #define USLEEP_FORKED_CHILD (3 * 50 * 1000) static long handle_clone_ret(long ret) { if (ret != 0) { return ret; } usleep(USLEEP_FORKED_CHILD); syscall(__NR_exit, 0); while (1) { } } static long syz_clone(volatile long flags, volatile long stack, volatile long stack_len, volatile long ptid, volatile long ctid, volatile long tls) { long sp = (stack + stack_len) & ~15; long ret = (long)syscall(__NR_clone, flags & ~CLONE_VM, sp, ptid, ctid, tls); return handle_clone_ret(ret); } uint64_t r[4] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } *(uint32_t*)0x200001c0 = 2; *(uint32_t*)0x200001c4 = 0x80; *(uint8_t*)0x200001c8 = 0; *(uint8_t*)0x200001c9 = 8; *(uint8_t*)0x200001ca = 0; *(uint8_t*)0x200001cb = 0; *(uint32_t*)0x200001cc = 0; *(uint64_t*)0x200001d0 = 0; *(uint64_t*)0x200001d8 = 0; *(uint64_t*)0x200001e0 = 0; STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 0, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 1, 1, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 1, 2, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 3, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 4, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 5, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 6, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 7, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 8, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 9, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 10, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 11, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 12, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 13, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 14, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 15, 2); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 17, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 18, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 19, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 20, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 21, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 22, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 23, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 24, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 25, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 26, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 27, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 1, 28, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 29, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 30, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 31, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 32, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 33, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 34, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 35, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 36, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 37, 1); STORE_BY_BITMASK(uint64_t, , 0x200001e8, 0, 38, 26); *(uint32_t*)0x200001f0 = 0; *(uint32_t*)0x200001f4 = 0; *(uint64_t*)0x200001f8 = 0; *(uint64_t*)0x20000200 = 0; *(uint64_t*)0x20000208 = 0; *(uint64_t*)0x20000210 = 0; *(uint32_t*)0x20000218 = 0; *(uint32_t*)0x2000021c = 0; *(uint64_t*)0x20000220 = 0; *(uint32_t*)0x20000228 = 0; *(uint16_t*)0x2000022c = 0; *(uint16_t*)0x2000022e = 0; *(uint32_t*)0x20000230 = 0; *(uint32_t*)0x20000234 = 0; *(uint64_t*)0x20000238 = 0; res = syscall(__NR_perf_event_open, /*attr=*/0x200001c0ul, /*pid=*/0, /*cpu=*/0ul, /*group=*/-1, /*flags=*/0ul); if (res != -1) r[0] = res; res = -1; res = syz_clone(/*flags=CLONE_PIDFD|CLONE_SYSVSEM|CLONE_THREAD*/ 0x51000, /*stack=*/0x200000c0, /*stack_len=*/0, /*parentid=*/0x20000000, /*childtid=*/0, /*tls=*/0); if (res != -1) r[1] = res; *(uint32_t*)0x20000280 = 5; *(uint32_t*)0x20000284 = 5; *(uint64_t*)0x20000288 = 0x200005c0; memcpy((void*)0x200005c0, "\x18\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18" "\x00\x00\x00\xe5\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x95", 33); *(uint64_t*)0x20000290 = 0x20000980; memcpy((void*)0x20000980, "GPL\000", 4); *(uint32_t*)0x20000298 = 0; *(uint32_t*)0x2000029c = 0; *(uint64_t*)0x200002a0 = 0; *(uint32_t*)0x200002a8 = 0; *(uint32_t*)0x200002ac = 0; memset((void*)0x200002b0, 0, 16); *(uint32_t*)0x200002c0 = 0; *(uint32_t*)0x200002c4 = 0x1e; *(uint32_t*)0x200002c8 = 0; *(uint32_t*)0x200002cc = 0; *(uint64_t*)0x200002d0 = 0; *(uint32_t*)0x200002d8 = 0; *(uint32_t*)0x200002dc = 0; *(uint64_t*)0x200002e0 = 0; *(uint32_t*)0x200002e8 = 0; *(uint32_t*)0x200002ec = 0; *(uint32_t*)0x200002f0 = 0; *(uint32_t*)0x200002f4 = 0; *(uint64_t*)0x200002f8 = 0; *(uint64_t*)0x20000300 = 0; *(uint32_t*)0x20000308 = 0; *(uint32_t*)0x2000030c = 2; *(uint32_t*)0x20000310 = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000280ul, /*size=*/0x94ul); if (res != -1) r[2] = res; syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0ul, /*size=*/0x48ul); syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x40042408, /*prog=*/r[2]); syscall(__NR_ioctl, /*fd=*/-1, /*cmd=*/0x40042408, /*prog=*/r[2]); syscall(__NR_bpf, /*cmd=*/6ul, /*arg=*/0ul, /*size=*/0ul); res = syscall(__NR_perf_event_open, /*attr=*/0ul, /*pid=*/0, /*cpu=*/0ul, /*group=*/-1, /*flags=*/0ul); if (res != -1) r[3] = res; syscall(__NR_close, /*fd=*/-1); syscall(__NR_ioctl, /*fd=*/-1, /*cmd=*/0x400454ca, /*arg=*/0ul); syscall(__NR_perf_event_open, /*attr=*/0ul, /*pid=*/r[1], /*cpu=*/4ul, /*group=*/r[3], /*flags=PERF_FLAG_FD_CLOEXEC|PERF_FLAG_FD_OUTPUT*/ 0xaul); syz_clone(/*flags=CLONE_PARENT_SETTID|CLONE_SETTLS|CLONE_VFORK*/ 0x184000, /*stack=*/0, /*stack_len=*/0xfffffffffffffd78, /*parentid=*/0, /*childtid=*/0, /*tls=*/0); return 0; }