// https://syzkaller.appspot.com/bug?id=a0c3ac16ab16ed18a5a2f18e4e0dba221711f2c8 // 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_ioctl #define __NR_ioctl 29 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 211 #endif #ifndef __NR_socket #define __NR_socket 198 #endif 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 (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=SOCK_RAW*/ 3ul, /*proto=*/0); if (res != -1) r[0] = res; memcpy((void*)0x20000300, "bond0\000\000\000\000\000\000\000\000\000\000\000", 16); res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x20000300ul); if (res != -1) r[1] = *(uint32_t*)0x20000310; res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0); if (res != -1) r[2] = res; *(uint64_t*)0x200007c0 = 0; *(uint32_t*)0x200007c8 = 0; *(uint64_t*)0x200007d0 = 0x20000780; *(uint64_t*)0x20000780 = 0x200000c0; *(uint32_t*)0x200000c0 = 0xa4; *(uint16_t*)0x200000c4 = 0x24; *(uint16_t*)0x200000c6 = 0xf0b; *(uint32_t*)0x200000c8 = 0x70bd2b; *(uint32_t*)0x200000cc = 0; *(uint8_t*)0x200000d0 = 0; *(uint8_t*)0x200000d1 = 0; *(uint16_t*)0x200000d2 = 0x12; *(uint32_t*)0x200000d4 = r[1]; *(uint16_t*)0x200000d8 = 0; *(uint16_t*)0x200000da = 0; *(uint16_t*)0x200000dc = -1; *(uint16_t*)0x200000de = -1; *(uint16_t*)0x200000e0 = 2; *(uint16_t*)0x200000e2 = 0; *(uint16_t*)0x200000e4 = 0xb; *(uint16_t*)0x200000e6 = 1; memcpy((void*)0x200000e8, "taprio\000", 7); *(uint16_t*)0x200000f0 = 0x74; *(uint16_t*)0x200000f2 = 2; *(uint16_t*)0x200000f4 = 0x56; *(uint16_t*)0x200000f6 = 1; *(uint8_t*)0x200000f8 = 2; *(uint8_t*)0x200000f9 = 0; *(uint8_t*)0x200000fa = 0; *(uint8_t*)0x200000fb = 0; *(uint8_t*)0x200000fc = 0; *(uint8_t*)0x200000fd = 0; *(uint8_t*)0x200000fe = 0; *(uint8_t*)0x200000ff = 0; *(uint8_t*)0x20000100 = 0; *(uint8_t*)0x20000101 = 0; *(uint8_t*)0x20000102 = 0; *(uint8_t*)0x20000103 = 1; *(uint8_t*)0x20000104 = 0; *(uint8_t*)0x20000105 = 0; *(uint8_t*)0x20000106 = 0; *(uint8_t*)0x20000107 = 0; *(uint8_t*)0x20000108 = 0; *(uint8_t*)0x20000109 = 0; *(uint16_t*)0x2000010a = 5; *(uint16_t*)0x2000010c = 4; *(uint16_t*)0x2000010e = 2; *(uint16_t*)0x20000110 = 0; *(uint16_t*)0x20000112 = 8; *(uint16_t*)0x20000114 = 0; *(uint16_t*)0x20000116 = 9; *(uint16_t*)0x20000118 = 0; *(uint16_t*)0x2000011a = 0; *(uint16_t*)0x2000011c = 0; *(uint16_t*)0x2000011e = 0; *(uint16_t*)0x20000120 = 0; *(uint16_t*)0x20000122 = 0; *(uint16_t*)0x20000124 = 0; *(uint16_t*)0x20000126 = 0; *(uint16_t*)0x20000128 = 3; *(uint16_t*)0x2000012a = 0; *(uint16_t*)0x2000012c = 8; *(uint16_t*)0x2000012e = 0; *(uint16_t*)0x20000130 = 0; *(uint16_t*)0x20000132 = 2; *(uint16_t*)0x20000134 = 0; *(uint16_t*)0x20000136 = 0; *(uint16_t*)0x20000138 = 0; *(uint16_t*)0x2000013a = 0; *(uint16_t*)0x2000013c = 0; *(uint16_t*)0x2000013e = 0; *(uint16_t*)0x20000140 = 0; *(uint16_t*)0x20000142 = 0; *(uint16_t*)0x20000144 = 0; *(uint16_t*)0x20000146 = 0; *(uint16_t*)0x20000148 = 0; *(uint16_t*)0x2000014c = 0x10; STORE_BY_BITMASK(uint16_t, , 0x2000014e, 2, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x2000014f, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x2000014f, 1, 7, 1); *(uint16_t*)0x20000150 = 0xc; STORE_BY_BITMASK(uint16_t, , 0x20000152, 1, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x20000153, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x20000153, 1, 7, 1); *(uint16_t*)0x20000154 = 8; *(uint16_t*)0x20000156 = 4; *(uint32_t*)0x20000158 = 0x400; *(uint16_t*)0x2000015c = 8; *(uint16_t*)0x2000015e = 5; *(uint32_t*)0x20000160 = 7; *(uint64_t*)0x20000788 = 0xa4; *(uint64_t*)0x200007d8 = 1; *(uint64_t*)0x200007e0 = 0; *(uint64_t*)0x200007e8 = 0; *(uint32_t*)0x200007f0 = 0x20000040; syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200007c0ul, /*f=*/0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-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=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }