// https://syzkaller.appspot.com/bug?id=10b6384fab28f67786f01e5878289525e8508411 // 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_bpf #define __NR_bpf 321 #endif static unsigned long long procid; 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; } 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 < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; *(uint32_t*)0x20000140 = 0x11; *(uint32_t*)0x20000144 = 8; *(uint64_t*)0x20000148 = 0x20000e40; memcpy( (void*)0x20000e40, "\x62\x0a\xf8\xff\x0c\x20\x00\x21\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01" "\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x03\x00\x00\x00\xbd\x12\x00\x00" "\x00\x00\x00\x00\x85\x00\x00\x00\x06\x00\x00\x00\xb7\x00\x00\x00\x00\x00" "\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x3f\xaf\x4f\x2a\xa3\xd9\xb1\x8e" "\xd8\x12\xa2\xe2\xc4\x9e\x80\x20\xa6\xf4\xe0\xe4\xa9\x44\x6c\x76\x70\x56" 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"\xe5\x94\x69\x32\xd6\xc9\x8c\xd1\xa9\xfb\xe1\xe7\xd5\x8c\x08\xac\xaf\x30" "\x23\x5b\x91\x8a\x31\xd2\xec\xa5\x5f\x74\xa2\x36\x41\xf6\x1f\x2d\x5b\x30" "\x8c\xf0\xd0\x31\xb0\xc7\xf0\xce\xd6\x99\x93\xe9\x96\x0f\xf5\xf7\x60\x15" "\xe6\x00\x97\x56\x23\x7b\xad\xf4\xe7\x96\x5b\xbe\x27\x77\xe8\x08\xfc\xba" "\x82\x1a\xa8\xe8\xc5\xc3\x96\x09\xff\x85\x43\x56\xcb\x49\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc1\xfe\xe3\x0a\x3f\x7a\x85\xd1\xb2" "\x9e\x58\xc7\x76\x85\xef\xc0\xce\xb1\xc8\xe5\x72\x9c\x66\x41\x8d\x16\x9f" "\xc0\x3a\xa1\x88\x54\x6b\x3a\xd2\xa1\x82\x06\x8e\x1e\x3a\x0e\x25\x05\x46" "\x6a\xc9\x6e\x0d\x4b\x3b\xc1\x9f\xaa\x54\x49\x20\x9b\x08\x3d\xbd\x33\x4b" "\x47\xf0\x67\xbb\xab\x40\x74\x3b\x2a\x42\x8f\x1d\xa1\xfc\x8d\xf7\x5c\xf4" "\x3f\x8e\xcc\x8d\x37\x26\x60\x21\x11\xb4\x0e\x76\x1f\xd2\x10\x81\x92\x03" "\x82\xf1\x4d\x12\xca\x3c\x34\x31\xee\x97\x47\x1c\x78\x68\xdc\xda\x7e\xaa" "\x69\xeb\x7f\x7f\x80\x57\x2f\xdd\x11\xbb\x1d\x0d\x12\x80\xfb\xc2\x2b\xf7" "\x34\x68\x78\x8d\xf5\x17\x10\xd7\xd3\x1c\x63\x2f\xc5\xed\x17\x85\xeb\x0b" "\x42\x8e\xe7\x51\xc4\x7d\x8e\x89\x4f\x74\x5a\x86\x84\x04\xa0\xbf\x35\xf0" "\x12\x10\x08\xb7\x22\xb1\xea\xa6\xae\xdf\xa1\xbf\x2e\x7c\xcb\x2d\x61\xd5" "\xd7\x63\x31\x94\x5e\x20\xfa\x26\xb8\x47\x1d\x42\x64\x52\x88\xd7\x22\x6b" "\xbd\x9c\x9e\x9e\x1c\xc9\xeb\x3d\x54\x1e\x40\x7c\xc2\xda\xe5\xe6\x90\xcd" "\x62\x8a\xb8\x48\x75\xf2\xc5\x0b\xa8\x91\xce\xa5\x99\xb0\x79\xb4\xb4\xba" "\x68\x6f\xcd\xf2\x40\x43\x0a\x53\x7a\x39\x5d\xc7\x3b\xda\x36\x7b\xf1\x2c" "\xb7\xd8\x16\x91\xa5\xfe\x8c\x47\xbe\x2f\x56\x56\xa2\x97\xe9\xdf\x0e\x71" "\xf9\x67\x56\xea\x5c\xce\x7d\xaa\xc4\xbe\x29\x01\x59\xf6\xbc\xd7\x5f\x0d" "\xda\x9d\xe5\x53\x2e\x71\xae\x9e\x48\xb0\xed\x12\x54\xa8\x31\x00\x00\x00" "\x00\xf6\xfb\xb8\x69\x60\x4d\x51\xa3\x6a\x54\xc8\x32\xe4\x5b\x25\x69\xdc" "\x0d\x90\xb0\x75\x22\x5f\xde\x44\xc4\xe0\x97\x31\x71\xad\x47\xd6\xb7\x0e" "\xbc\x66\x03\x09\xe1\xe2\x45\xb0\xfd\x78\xf9\x74\x3a\xf9\x32\xcd\x6d\xb4" "\x9a\x47\x61\x38\x08\xba\xd9\x59\x71\x9c\x00\x00\x00\x00\x00\x37\x8a\x92" "\x1c\x7f\x7f\x69\x33\xc2\xe2\x4c\x7e\x80\x00\x03\xc9\xe8\x09\x5e\x02\x98" "\x5f\x28\xde\x0b\xbc\x76\xd5\x8d\xd9\x26\x06\xb1\xef\x64\x86\xc8\x5f\xa3" "\xe6\x78\xf6\x64\x22\x43\x6f\x94\x9e\x2a\xb8\xf1\x62\xd7\xe3\xf8\x55\xe3" "\x78\xf4\xa1\xf4\x0b\x0c\x6f\xb2\xd4\xb2\x05\xa8\x00\xb6\x96\x8d\x12\x41" "\x8a\x4d\x2a\x0d\x08\x6d\x84\x38\xd4\x15\xd7\x13\xac\xeb\xc5\xb0\x14\xe6" "\x1a\x54\x3a\x5a\x39\x1f\x03\xda\xca\x80\xf0\x8f\x0e\x3b\x1a\x56\x9e\x73" "\x97\xf6\xca\xfa\x86\x96\x6d\x7b\xa1\x9e\x72\x04\x13\x26\x7a\x6c\xce\xa9" "\xc4\x39\x67\x1d\x2c\x68\x0f\x27\x53\xca\x18\x4e\xee\xb8\x43\x45\x03\x68" "\xac\xb4\x38\x3a\x01\xd2\x5e\xb3\xd1\xe2\x3e\x11\x26\x45\xd1\xcd\xfa\x9f" "\xa4\x10\x63\x2f\x95\xa5\xf6\x22\xf8\x51\xc6\x6e\xe7\xe3\x03\x93\xcd\x7a" "\x4d\x67\xff\x2a\x49\xc4\xf9\x3c\x09\x84\xb5\xc2\xd4\x52\x34\x97\xe4\xd6" "\x4f\x95\xf0\x84\x93\x56\x4a\x1d\xf8\x71\x11\xc9\xbf\x31\x94\xfe\xf9\x7d" "\xce\xcc\x46\x7a\xce\x45\xfe\xeb\x68\x5c\x58\x70\xd0\x5f\x88\xa0\xf4\x63" "\xdb\x88\xd3\x77\x44\x2e\x13\x49\xac\xaf\x76\x62\x18\xb5\x4a\x9d\x62\x47" "\x78\xe1\xc4\xcb\xa6\xe6\x39\x0a\x9f\x30\x2c\x6e\xb2\xdf\x77\x66\x41\x1b" "\xef\x0e\xbb\x50\x00\x00\x00\x00\x00\x60\x65\xd6\x73\x5e\xb7\xa0\x0e\x12" "\x7c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xa1\xc3" "\xda\x14\x45\x89\xdc\xad\xdb\x71\xcf\x93\x74\x84\x3e\x23\xf9\x92\xa2\x37" "\xa9\x04\x07\x47\xe0\x43\x4a\x8a\x64\x39\x90\xb4\x05\x9a\x98\x41\x1c\xe8" "\x67\xd1\xaf\x7e\x8e\xa8\x9f\x49\xe6\xf5\x64\xd4\xdc\xe8\xa7\xd6\x93\x9a" "\x92\x14\x4e\x43\xa7\xf3\x9e\x83\xbd\x24\x7e\x03\xa0\x9d\xba\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa\xf0\x33\xd4\x72\x49\xc8\x44\x4b" "\xc1\x38\x44\xcb\xf1\xbe\x61\x7d\x82\xb2\x69\xe5\xea\x0c\x0d\x52\x56\x03" "\xc0\xec\x54\x3e\xa5\x81\xf6\x38\x93\xae\x41\x4a\x66\x83\xe9\x41\xfd\xbd" "\x6e\xa6\xcf\xc5\xf8\x74\x45\x83\xc0\xaa\x76\x6a\x65\x32\x1f\x90\x79\x27" "\xa5\x9d\x75\xb4\x7f\x06\x89\x5e\x84\x71\xeb\xc2\x84\x0c\xe5\xbd\x05\x4d" "\xf2\x23\xfb\x09\xb9\xc7\x39\xad\x08\x74\xcb\x97\x7c\x99\xb6\xbc\x1a\x87" "\x32\x19\x8a\x17\xe6\x10\x08\x2b\x7c\xe0\x36\x5f\x27\x1b\x11\xd4\xb4\xa3" "\xd4\xc7\xd0\xbb\x27\x3f\x40\x6e\xcd\x4b\x26\xc9\x31\x51\xc3\x0f\x5a\x26" "\x99\x91\x40\x2d\x18\x9b\xec\x12\x67\xdd\x7d\x78\x1a\xa2\x00\x00\x00\x00" "\x00\x00\xe5\x40\xd8\xb0\xdb\x37\x74\xef\xfb\x74\x69\xa2\x1f\x96\xe2\x59" "\x4b\x29\x73\xeb\xf7\xa1\xbd\x9a\xce\x2e\xd4\xd6\xeb\x17\x35\xf8\x58\x85" "\xbe\x5b\xe7\x4d\xc2\xea\x5d\x7d\x49\x9b\xd2\x82\x71\xb9\x8f\x18\x7f\x58" "\x79\xb1\x6b\x40\x9a\x04\xd7\x81\x75\xcc\x8d\x0f\x70\x7c\x82\x28\x05\xd7" "\x01\x1e\xd4\xb2\x24\x19\x18\x6d\xd2\xb2\x2a\xad\xf1\x58\x28\xdb\x2c\xa1" "\x9d\x79\xe1\xbf\x2f\x79\x89\x23\x7e\xe5\xcb\x2e\x1e\xb7\xb2\xbf\xc9\x2d" "\x3a\xa9\x5a\x26\xf0\x60\x93\x5c\x4f\xee\x8b\x2d\x7d\x0b\xf3\xab\xb8\xc6" "\xd8\x2d\x04\x32\x91\x64\xbd\x4e\xe0\xb8\x06\x01\x83\xf3\x67\x62\xb0\x44" "\x0d\x90\x82\xd7\xc8\xb0\x6e\x4c\x20\x24\xf7\x7e\x10\x18\x75\x8d\x28\xe7" "\xee\x29\x0f\x32\xa4\x8b\xfc\x2a\xa1\x0b\x3d\xba\x9b\xff\x00\xd2\x41\x0f" "\x34\x77\xa8\xe0\xdf\x68\x9c\x88\x0d\xc9\xa6\x77\xcf\xaa\x16\x60\x35\x27" "\xc0\x66\x25\xa3\x36\x37\x44\xce\xa5\xf2\xd3\x50\x22\x4c\xc0\xfe\xa7\x6c" "\x72\xca\x08\x50\x72\x35\xc6\x73\x46\x72\x2f\x20\x69\x0f\xde\x07\x90\xf0" "\x40\xf5\xfd\x3e\xff\x75\xf9\xb2\x91\xcc\x5e\x9c\x68\x6e\xba\xad\xbe\x75" "\x6c\x6f\xa0\x39\xff\x44\x1e\x42\x7e\xd1\x25\x78\xd5\xcb\x04\x1e\xbf\x72" "\x9c\xfa\xa5\x75\xcc\x85\x2f\xbd\xb5\x4e\x60\x43\x5e\x6d\x62\xb9\xd2\x70" "\x43\x3b\x22\x0e\xd9\xff\x1f\xf0\x42\xb8\xd3\xd8\x66\x23\x1c\x46\x07\x65" "\x00\x00\x00\x00\x4f\xf6\x7e\x98\xd9\xed\x87\x37\x15\x92\xf7\xeb\xde\xa9" "\xbd\x0d\x1a\x0c\x53\x8b\x23\xf7\x32\xd7\x3b\x25\xdf\xa9\x84\x31\x51\xbe" "\xd4\x84\xd3\x41\xb6\x94\x05\xa0\xf3\x19\xa0\xa6\xa2\x6c\xb6\x1e\xa6\xbb" "\xdd\x99\x33\x61\x30\x5f\x69", 3121); *(uint64_t*)0x20000150 = 0x20000100; memcpy((void*)0x20000100, "GPL\000", 4); *(uint32_t*)0x20000158 = 0; *(uint32_t*)0x2000015c = 0; *(uint64_t*)0x20000160 = 0; *(uint32_t*)0x20000168 = 0; *(uint32_t*)0x2000016c = 0; memset((void*)0x20000170, 0, 16); *(uint32_t*)0x20000180 = 0; *(uint32_t*)0x20000184 = 0; *(uint32_t*)0x20000188 = -1; *(uint32_t*)0x2000018c = 8; *(uint64_t*)0x20000190 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000198 = 8; *(uint32_t*)0x2000019c = 0x10; *(uint64_t*)0x200001a0 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0; *(uint32_t*)0x2000000c = 0; *(uint32_t*)0x200001a8 = 0x10; *(uint32_t*)0x200001ac = 0; *(uint32_t*)0x200001b0 = -1; *(uint32_t*)0x200001b4 = 0; *(uint64_t*)0x200001b8 = 0; *(uint64_t*)0x200001c0 = 0; *(uint32_t*)0x200001c8 = 0x10; *(uint32_t*)0x200001cc = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000140ul, /*size=*/0x1ful); if (res != -1) r[0] = res; *(uint64_t*)0x20000100 = 0x20000080; memcpy((void*)0x20000080, "kfree\000", 6); *(uint32_t*)0x20000108 = r[0]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000100ul, /*size=*/0x10ul); *(uint32_t*)0x20000340 = 2; *(uint32_t*)0x20000344 = 4; *(uint32_t*)0x20000348 = 8; *(uint32_t*)0x2000034c = 1; *(uint32_t*)0x20000350 = 0x80; *(uint32_t*)0x20000354 = -1; *(uint32_t*)0x20000358 = 0; memset((void*)0x2000035c, 0, 16); *(uint32_t*)0x2000036c = 0; *(uint32_t*)0x20000370 = -1; *(uint32_t*)0x20000374 = 0; *(uint32_t*)0x20000378 = 0; *(uint32_t*)0x2000037c = 0; *(uint64_t*)0x20000380 = 0; res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x20000340ul, /*size=*/0x48ul); if (res != -1) r[1] = res; *(uint32_t*)0x20000480 = r[1]; syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0x20000480ul, /*size=*/4ul); *(uint32_t*)0x20000800 = 0x11; *(uint32_t*)0x20000804 = 0x18; *(uint64_t*)0x20000808 = 0x200001c0; memcpy((void*)0x200001c0, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xb7" "\x08\x00\x00\x00\x00\x00\x00\x7b\x8a\xf8\xff\x00\x00\x00\x00\xb7\x08" "\x00\x00\x00\x00\x00\x00\x7b\x8a\xf0\xff\x00\x00\x00\x00\xbf\xa1\x00" "\x00\x00\x00\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff\xbf\xa4\x00\x00" "\x00\x00\x00\x00\x07\x04\x00\x00\xf0\xff\xff\xff\xb7\x02\x00\x00\x00" "\x00\x00\x00\x18\x23\x00\x00", 92); *(uint32_t*)0x2000021c = r[1]; memcpy( (void*)0x20000220, "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x05\x00\x00\x00\x00\x00\x00\x85\x00" "\x00\x00\xa5\x00\x00\x00\x18\x01\x00\x00\x20\x20\x64\x05\x00\x00\x00\x00" "\x00\x20\x20\x20\x7b\x1a\xf8\xff\x00\x00\x00\x00\xbf\xa1\x00\x00\x00\x00" "\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x08\x00\x00\x00" "\xb7\x03\x00\x00\x00\x00\x00\x00\xa5\x00\x00\x00\x08\x00\x00\x00\x95", 89); *(uint64_t*)0x20000810 = 0x20000600; memcpy((void*)0x20000600, "GPL\000", 4); *(uint32_t*)0x20000818 = 0; *(uint32_t*)0x2000081c = 0; *(uint64_t*)0x20000820 = 0; *(uint32_t*)0x20000828 = 0; *(uint32_t*)0x2000082c = 0; memset((void*)0x20000830, 0, 16); *(uint32_t*)0x20000840 = 0; *(uint32_t*)0x20000844 = 0; *(uint32_t*)0x20000848 = 0; *(uint32_t*)0x2000084c = 0; *(uint64_t*)0x20000850 = 0; *(uint32_t*)0x20000858 = 0; *(uint32_t*)0x2000085c = 0; *(uint64_t*)0x20000860 = 0; *(uint32_t*)0x20000868 = 0; *(uint32_t*)0x2000086c = 0; *(uint32_t*)0x20000870 = 0; *(uint32_t*)0x20000874 = 0; *(uint64_t*)0x20000878 = 0; *(uint64_t*)0x20000880 = 0; *(uint32_t*)0x20000888 = 0; *(uint32_t*)0x2000088c = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000800ul, /*size=*/0x90ul); if (res != -1) r[2] = res; *(uint64_t*)0x200002c0 = 0x20000000; memcpy((void*)0x20000000, "kmem_cache_free\000", 16); *(uint32_t*)0x200002c8 = r[2]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200002c0ul, /*size=*/0x10ul); } 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); for (procid = 0; procid < 5; procid++) { if (fork() == 0) { loop(); } } sleep(1000000); return 0; }