// https://syzkaller.appspot.com/bug?id=54f4ce6239e6e0d0d5583488421c6fa3ba7ed6b4 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include __attribute__((noreturn)) static void doexit(int status) { volatile unsigned i; syscall(__NR_exit_group, status); for (i = 0;; i++) { } } #include #include #include #include #include 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 void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); setsid(); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 128 << 20; setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); #define CLONE_NEWCGROUP 0x02000000 if (unshare(CLONE_NEWNS)) { } if (unshare(CLONE_NEWIPC)) { } if (unshare(CLONE_NEWCGROUP)) { } if (unshare(CLONE_NEWUTS)) { } if (unshare(CLONE_SYSVSEM)) { } } static int do_sandbox_none(void) { if (unshare(CLONE_NEWPID)) { } int pid = fork(); if (pid < 0) fail("sandbox fork failed"); if (pid) return pid; sandbox_common(); if (unshare(CLONE_NEWNET)) { } loop(); doexit(1); } static void test(); void loop() { while (1) { test(); } } uint64_t r[1] = {0xffffffffffffffff}; uint64_t procid; void test() { long res; res = syscall(__NR_socket, 0xf, 3, 2); if (res != -1) r[0] = res; *(uint64_t*)0x20f56000 = 0; *(uint32_t*)0x20f56008 = 0; *(uint64_t*)0x20f56010 = 0x208feff0; *(uint64_t*)0x208feff0 = 0x20333f88; *(uint8_t*)0x20333f88 = 2; *(uint8_t*)0x20333f89 = 2; *(uint8_t*)0x20333f8a = 0; *(uint8_t*)0x20333f8b = 9; *(uint16_t*)0x20333f8c = 0xa; *(uint16_t*)0x20333f8e = 0; *(uint32_t*)0x20333f90 = 0; *(uint32_t*)0x20333f94 = 0; *(uint16_t*)0x20333f98 = 3; *(uint16_t*)0x20333f9a = 6; *(uint8_t*)0x20333f9c = 0; *(uint8_t*)0x20333f9d = 0; *(uint16_t*)0x20333f9e = 0; *(uint16_t*)0x20333fa0 = 2; *(uint16_t*)0x20333fa2 = htobe16(0x4e20); *(uint32_t*)0x20333fa4 = htobe32(0xe0000001); *(uint8_t*)0x20333fa8 = 0; *(uint8_t*)0x20333fa9 = 0; *(uint8_t*)0x20333faa = 0; *(uint8_t*)0x20333fab = 0; *(uint8_t*)0x20333fac = 0; *(uint8_t*)0x20333fad = 0; *(uint8_t*)0x20333fae = 0; *(uint8_t*)0x20333faf = 0; *(uint16_t*)0x20333fb0 = 2; *(uint16_t*)0x20333fb2 = 1; *(uint32_t*)0x20333fb4 = htobe32(0); *(uint8_t*)0x20333fb8 = 0; *(uint8_t*)0x20333fb9 = 0; *(uint8_t*)0x20333fba = 0; *(uint8_t*)0x20333fbb = 2; *(uint32_t*)0x20333fbc = 0; *(uint16_t*)0x20333fc0 = 3; *(uint16_t*)0x20333fc2 = 5; *(uint8_t*)0x20333fc4 = 0; *(uint8_t*)0x20333fc5 = 0; *(uint16_t*)0x20333fc6 = 0; *(uint16_t*)0x20333fc8 = 2; *(uint16_t*)0x20333fca = htobe16(0x4e20); *(uint32_t*)0x20333fcc = htobe32(0xe0000001); *(uint8_t*)0x20333fd0 = 0; *(uint8_t*)0x20333fd1 = 0; *(uint8_t*)0x20333fd2 = 0; *(uint8_t*)0x20333fd3 = 0; *(uint8_t*)0x20333fd4 = 0; *(uint8_t*)0x20333fd5 = 0; *(uint8_t*)0x20333fd6 = 0; *(uint8_t*)0x20333fd7 = 0; *(uint64_t*)0x208feff8 = 0x50; *(uint64_t*)0x20f56018 = 1; *(uint64_t*)0x20f56020 = 0; *(uint64_t*)0x20f56028 = 0; *(uint32_t*)0x20f56030 = 0; syscall(__NR_sendmsg, r[0], 0x20f56000, 0); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); for (procid = 0; procid < 8; procid++) { if (fork() == 0) { for (;;) { int pid = do_sandbox_none(); int status = 0; while (waitpid(pid, &status, __WALL) != pid) { } } } } sleep(1000000); return 0; }