| // KASAN: use-after-free Write in bpf_tcp_close |
| // https://syzkaller.appspot.com/bug?id=6a6fd266a962be281b17c864a073675150e36ca5 |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <sys/prctl.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| static uint64_t current_time_ms() |
| { |
| struct timespec ts; |
| |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| fail("clock_gettime failed"); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| static void loop() |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| fail("clone failed"); |
| if (pid == 0) { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| execute_one(); |
| doexit(0); |
| } |
| |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| int res = waitpid(-1, &status, __WALL | WNOHANG); |
| if (res == pid) { |
| break; |
| } |
| usleep(1000); |
| if (current_time_ms() - start < 3 * 1000) |
| continue; |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| break; |
| } |
| } |
| } |
| |
| #ifndef __NR_bpf |
| #define __NR_bpf 321 |
| #endif |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| unsigned long long procid; |
| void execute_one() |
| { |
| long res = 0; |
| syscall(__NR_socketpair, 0, 0, 0, 0x20000140); |
| syscall(__NR_socket, 0xa, 1, 0); |
| *(uint32_t*)0x20000280 = 0xf; |
| *(uint32_t*)0x20000284 = 4; |
| *(uint32_t*)0x20000288 = 4; |
| *(uint32_t*)0x2000028c = 0x70; |
| *(uint32_t*)0x20000290 = 0; |
| *(uint32_t*)0x20000294 = -1; |
| *(uint32_t*)0x20000298 = 0; |
| *(uint8_t*)0x2000029c = 0; |
| *(uint8_t*)0x2000029d = 0; |
| *(uint8_t*)0x2000029e = 0; |
| *(uint8_t*)0x2000029f = 0; |
| *(uint8_t*)0x200002a0 = 0; |
| *(uint8_t*)0x200002a1 = 0; |
| *(uint8_t*)0x200002a2 = 0; |
| *(uint8_t*)0x200002a3 = 0; |
| *(uint8_t*)0x200002a4 = 0; |
| *(uint8_t*)0x200002a5 = 0; |
| *(uint8_t*)0x200002a6 = 0; |
| *(uint8_t*)0x200002a7 = 0; |
| *(uint8_t*)0x200002a8 = 0; |
| *(uint8_t*)0x200002a9 = 0; |
| *(uint8_t*)0x200002aa = 0; |
| *(uint8_t*)0x200002ab = 0; |
| res = syscall(__NR_bpf, 0, 0x20000280, 0x2c); |
| if (res != -1) |
| r[0] = res; |
| *(uint32_t*)0x20000180 = r[0]; |
| *(uint64_t*)0x20000188 = 0x20000000; |
| *(uint64_t*)0x20000190 = 0x20000140; |
| *(uint64_t*)0x20000198 = 0; |
| syscall(__NR_bpf, 2, 0x20000180, 0x20); |
| *(uint32_t*)0x20000280 = 0xf; |
| *(uint32_t*)0x20000284 = 4; |
| *(uint32_t*)0x20000288 = 4; |
| *(uint32_t*)0x2000028c = 0x70; |
| *(uint32_t*)0x20000290 = 0; |
| *(uint32_t*)0x20000294 = -1; |
| *(uint32_t*)0x20000298 = 0; |
| *(uint8_t*)0x2000029c = 0; |
| *(uint8_t*)0x2000029d = 0; |
| *(uint8_t*)0x2000029e = 0; |
| *(uint8_t*)0x2000029f = 0; |
| *(uint8_t*)0x200002a0 = 0; |
| *(uint8_t*)0x200002a1 = 0; |
| *(uint8_t*)0x200002a2 = 0; |
| *(uint8_t*)0x200002a3 = 0; |
| *(uint8_t*)0x200002a4 = 0; |
| *(uint8_t*)0x200002a5 = 0; |
| *(uint8_t*)0x200002a6 = 0; |
| *(uint8_t*)0x200002a7 = 0; |
| *(uint8_t*)0x200002a8 = 0; |
| *(uint8_t*)0x200002a9 = 0; |
| *(uint8_t*)0x200002aa = 0; |
| *(uint8_t*)0x200002ab = 0; |
| res = syscall(__NR_bpf, 0, 0x20000280, 0x2c); |
| if (res != -1) |
| r[1] = res; |
| *(uint32_t*)0x20000180 = r[1]; |
| *(uint64_t*)0x20000188 = 0x20000000; |
| *(uint64_t*)0x20000190 = 0x20000140; |
| *(uint64_t*)0x20000198 = 0; |
| syscall(__NR_bpf, 2, 0x20000180, 0x20); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (procid = 0; procid < 8; procid++) { |
| if (fork() == 0) { |
| for (;;) { |
| loop(); |
| } |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |