// https://syzkaller.appspot.com/bug?id=de3e6a5819c6d19e71f4c5361b61a94602c694f2 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_getsockname #define __NR_getsockname 286 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 296 #endif #ifndef __NR_sendto #define __NR_sendto 290 #endif #ifndef __NR_socket #define __NR_socket 281 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } #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)))) static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 15000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[7] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_one(void) { intptr_t res = 0; res = syscall(__NR_socket, 0x11, 3, 0x300); if (res != -1) r[0] = res; res = syscall(__NR_socket, 0x10, 3, 0); if (res != -1) r[1] = res; res = syscall(__NR_socket, 0x10, 0x803, 0); if (res != -1) r[2] = res; *(uint32_t*)0x20000380 = 0; *(uint32_t*)0x20000384 = 0x9945d516; *(uint32_t*)0x20000388 = 0x20000340; *(uint32_t*)0x20000340 = 0; *(uint32_t*)0x20000344 = 0x14; *(uint32_t*)0x2000038c = 1; *(uint32_t*)0x20000390 = 0; *(uint32_t*)0x20000394 = 0; *(uint32_t*)0x20000398 = 0; syscall(__NR_sendmsg, (intptr_t)r[2], 0x20000380, 0); *(uint32_t*)0x20000200 = 0x28a; res = syscall(__NR_getsockname, (intptr_t)r[2], 0x20000140, 0x20000200); if (res != -1) r[3] = *(uint32_t*)0x20000144; res = syscall(__NR_socket, 0x10, 3, 0); if (res != -1) r[4] = res; res = syscall(__NR_socket, 0x10, 0x803, 0); if (res != -1) r[5] = res; *(uint32_t*)0x20000380 = 0; *(uint32_t*)0x20000384 = 0x9945d516; *(uint32_t*)0x20000388 = 0x20000340; *(uint32_t*)0x20000340 = 0; *(uint32_t*)0x20000344 = 0x14; *(uint32_t*)0x2000038c = 1; *(uint32_t*)0x20000390 = 0; *(uint32_t*)0x20000394 = 0; *(uint32_t*)0x20000398 = 0; syscall(__NR_sendmsg, (intptr_t)r[5], 0x20000380, 0); *(uint32_t*)0x20000200 = 0x28a; res = syscall(__NR_getsockname, (intptr_t)r[5], 0x20000140, 0x20000200); if (res != -1) r[6] = *(uint32_t*)0x20000144; *(uint32_t*)0x20000080 = 0; *(uint32_t*)0x20000084 = 0; *(uint32_t*)0x20000088 = 0x20000500; *(uint32_t*)0x20000500 = 0x20000240; *(uint32_t*)0x20000240 = 0x40; *(uint16_t*)0x20000244 = 0x10; *(uint16_t*)0x20000246 = 0x439; *(uint32_t*)0x20000248 = 0; *(uint32_t*)0x2000024c = 0; *(uint8_t*)0x20000250 = 0; *(uint8_t*)0x20000251 = 0; *(uint16_t*)0x20000252 = 0; *(uint32_t*)0x20000254 = r[6]; *(uint32_t*)0x20000258 = 0x9801; *(uint32_t*)0x2000025c = 0; *(uint16_t*)0x20000260 = 0x20; STORE_BY_BITMASK(uint16_t, , 0x20000262, 0x12, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x20000263, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x20000263, 1, 7, 1); *(uint16_t*)0x20000264 = 8; *(uint16_t*)0x20000266 = 1; memcpy((void*)0x20000268, "gre\000", 4); *(uint16_t*)0x2000026c = 0x14; STORE_BY_BITMASK(uint16_t, , 0x2000026e, 2, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x2000026f, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x2000026f, 1, 7, 1); *(uint16_t*)0x20000270 = 8; *(uint16_t*)0x20000272 = 1; *(uint32_t*)0x20000274 = r[3]; *(uint16_t*)0x20000278 = 8; *(uint16_t*)0x2000027a = 7; *(uint8_t*)0x2000027c = 0xac; *(uint8_t*)0x2000027d = 0x1e; *(uint8_t*)0x2000027e = 0; *(uint8_t*)0x2000027f = 1; *(uint32_t*)0x20000504 = 0x40; *(uint32_t*)0x2000008c = 1; *(uint32_t*)0x20000090 = 0; *(uint32_t*)0x20000094 = 0; *(uint32_t*)0x20000098 = 0; syscall(__NR_sendmsg, (intptr_t)r[4], 0x20000080, 0); *(uint32_t*)0x20000080 = 0; *(uint32_t*)0x20000084 = 0; *(uint32_t*)0x20000088 = 0x20000500; *(uint32_t*)0x20000500 = 0x20000240; *(uint32_t*)0x20000240 = 0x40; *(uint16_t*)0x20000244 = 0x10; *(uint16_t*)0x20000246 = 0x439; *(uint32_t*)0x20000248 = 0; *(uint32_t*)0x2000024c = 0; *(uint8_t*)0x20000250 = 0; *(uint8_t*)0x20000251 = 0; *(uint16_t*)0x20000252 = 0; *(uint32_t*)0x20000254 = r[3]; *(uint32_t*)0x20000258 = 0x9801; *(uint32_t*)0x2000025c = 0; *(uint16_t*)0x20000260 = 0x20; STORE_BY_BITMASK(uint16_t, , 0x20000262, 0x12, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x20000263, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x20000263, 1, 7, 1); *(uint16_t*)0x20000264 = 8; *(uint16_t*)0x20000266 = 1; memcpy((void*)0x20000268, "gre\000", 4); *(uint16_t*)0x2000026c = 0x14; STORE_BY_BITMASK(uint16_t, , 0x2000026e, 2, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x2000026f, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x2000026f, 1, 7, 1); *(uint16_t*)0x20000270 = 8; *(uint16_t*)0x20000272 = 1; *(uint32_t*)0x20000274 = r[6]; *(uint16_t*)0x20000278 = 8; *(uint16_t*)0x2000027a = 7; *(uint8_t*)0x2000027c = 0xac; *(uint8_t*)0x2000027d = 0x1e; *(uint8_t*)0x2000027e = 0; *(uint8_t*)0x2000027f = 1; *(uint32_t*)0x20000504 = 0x40; *(uint32_t*)0x2000008c = 1; *(uint32_t*)0x20000090 = 0; *(uint32_t*)0x20000094 = 0; *(uint32_t*)0x20000098 = 0; syscall(__NR_sendmsg, (intptr_t)r[1], 0x20000080, 0); syscall(__NR_sendto, (intptr_t)r[0], 0, 0, 0, 0, 0); } int main(void) { syscall(__NR_mmap, 0x1ffff000, 0x1000, 0, 0x32, -1, 0); syscall(__NR_mmap, 0x20000000, 0x1000000, 7, 0x32, -1, 0); syscall(__NR_mmap, 0x21000000, 0x1000, 0, 0x32, -1, 0); loop(); return 0; }