// https://syzkaller.appspot.com/bug?id=f00aada4bedaebb8fe76a92659bb73928759d45a // 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[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; *(uint32_t*)0x20000080 = 0x11; *(uint32_t*)0x20000084 = 8; *(uint64_t*)0x20000088 = 0x20001700; memcpy( (void*)0x20001700, "\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\x1e\x7f\x2a\xa3\xd9" "\xb1\x8e\xd8\x1c\x0c\x86\x9b\x51\xec\x6c\x0a\xf4\xe0\xe4\xa9\x44\x6c\x76" "\x70\x56\x89\x82\xb4\xe0\x20\xf6\x98\x39\x3a\xa0\xf3\x88\x1f\x9c\x24\xaa" 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"\x6e\xb2\xdf\x77\x66\x41\x1b\xef\x0e\xbb\x50\x00\x00\x00\x00\x00\x60\x65" "\xd6\x35\xb0\xb7\xa0\x0e\xe7\x67\x22\x1d\x8a\xf9\x75\x33\x87\xe0\xcd\x8d" "\x71\x8f\x54\xa2\x9d\xf6\xeb\xa3\xbd\x4c\x44\x0e\x6e\x21\x72\xe3\xfc\xc0" "\x1b\x8b\xab\xb7\x57\xb5\xc5\x92\x17\xb8\x0d\x0d\xb3\xba\x58\x28\x14\xa6" "\x04\xe4\xef\x7a\x80\x3e\x9c\xa7\xc8\x5b\x35\xc9\xb9\x3a\x9e\x08\x85\xe2" "\x38\xb4\x4a\xe1\xc2\xe6\x4c\xce\x3b\x27\x08\x3b\x82\x46\x82\x9e\x64\x05" "\x60\x00\x30\x2b\xff\xff\x15\x40\x5b\xd5\xf2\xeb\xa2\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9a\x98\x23\xfd\x8f" "\xbc\x5a\xa1\x65\x09\x9c\x5e\xd0\x32\xb4\x8e\xa1\x2d\x8e\x05\x88\xdc\x52" "\x70\x2e\x40\x84\x91\x3a\x06\xd4\x68\xd0\x92\x8b\xad\x76\xd6\x97\xe1\xf8" "\x5a\xb0\x30\xe7\x88\xd3\x87\x88\xee\x5b\x54\x28\xd4\xa9\x71\xcc\x97\xdb" "\x9f\xd2\x31\x08\x8e\x57\x07\x35\xce\x12\x9e\x7e\x77\xfc\x27\x77\x69\x26" "\x64\xa1\x48\x8f\xd8\xd6\xdf\xf4\xda\xd6\x18\xfd\x54\xf5\x29\xd4\x55\x5c" "\x65\x07\x00\x9e\xe6\x9d\xd1\xbc\x55\x25\x87\x89\xb2\x40\x52\x13\x7e\x96" "\x37\xf3\xef\xba\xb7\x17\x20\xf8\x8c\xf5\x73\xfe\x0e\x52\x39\xc0\x00\xbe" "\x27\x33\xc4\x95\x46\xf6\xe8\xa9\x17\x5e\xc6\xf1\x4d\xbf\x72\xca\xc9\x16" "\x43\xb2\xfd\x99\xc2\x9e\xca\x28\xa3\xc2\xe6\x0d\x5e\x5b\x87\x95\xfa\xe1" "\x6a\x7c\x3e\xa5\x7e\x72\x8e\xca\x35\xea\xf0\x15\x5a\x39\xf9\x75\x80\xe0" "\x79\x17\x54\x26\xc0\x88\xa0\x20\x80\x40\x98\x2a\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x51\xce\xaa\xf0\x15\x9f\xe6\x1f\x2e\xad\xe7" "\x60\x3d\x0a\x7a\x56\xfb\x09\xcd\x11\x9a\xc0\x6a\xdb\x65\x97\x15\x5a\xe4" "\x78\x46\x89\x2b\xb4\x23\xc0\x24\xd8\xcb\xe9\x24\x0b\x71\xec\x6d\xc2\x12" "\x4d\x3a\x19\xe2\xd7\x14\xb2\x73\xd9\x5d\x1d\x3a\xa7\x37\xcb\x04\xa3\x36" "\x15\xff\x2a\x73\x0e\x51\x06\x7d\x5d\x67\x5d\x71\x22\x36\x1c\x37\xc6\x1a" "\x43\xb5\xaf\xd8\x65\xb6\x0d\x4c\xae\x89\x1b\x73\x22\x0f\x17\xd2\x59\x85" "\xa7\xf7\x68\x34\x99\x5e\x53\xa9\x3a\x1c\x7b\x9e\xef\x26\x7d\xf6\x91\xca" "\x98\x3a\x0b\x15\xbd\xa7\xf6\xc5\xc1\xca\x7a\xa5\x02\x61\xa3\x08\x9a\x1e" "\xbf\x07\x34\xc9\xb0\x7e\x89\x51\xff\x02\x32\x63\xad\x5a\xed\x8c\xfb\x49" "\xb4\x9e\x12\x8c\x69\x77\x24\xc0\x57\xd2\x2c\x5d\xf5\xae\xf2\x7c\xe3\xdb" "\x11\xd5\xad\x55\x27\xd1\x49\xd0\x76\xe1\xa8\x7e\x2d\xf2\x7c\x0c\xb8\xa6" "\x7a\xd0\x26\xbf\x95\x3e\x88\xf1\x04\x47\xe1\x25\xc2\xc0\xf1\xae\xbe\xe1" "\xf3\x39\x0a\x9e\x3d\xda\xd4\xe2\xa6\xe0\xf6\xe4\x56\x9f\xde\xfa\x19\xe8" "\x70\xe0\x4a\xcf\x94\x93\xb9\x63\xf9\x8e\x23\xcf\xc6\x65\xe4\xf4\x65\xfa" "\x3f\x80\x1e\x19\x57\xc3\x99\xe4\x5f\x61\xd3\x45\x9b\x1c\x60\x62\x04\x36" "\x8b\xb9\x31\x34\x5a\xf2\x82\x3c\x48\x7d\x2f\xd9\x9d\xb6\xea\x6e\x00\x8e" "\x7f\xfa\x06\xca\x86\x15\x51\x18\x9d\x15\x5b\xd0\x77\xa7\x9f\xe2\xc7\xe9" "\x61\x35\x2e\x56\x82\x4f\x72\x7d\x21\xd4\x1e\xae\x78\xbf\xec\x4a\x2d\x7a" "\x7e\xdb\xc8\xef\x95\x8c\x5e\xa5\x99\xf7\x15\x7a\xf3\xe6\xf7\x8c\xab\x23" "\xc2\x5b\xf7\x1c\x23\x40\x55\x8a\xa1\x2f\xdd\x24\xa8\x8a\xaa\xd5\x92\x1a" "\xee\x7d\xae\x6a\x2f\x30\x09\xd9\xcb\x43\xab\x48\x98\xd0\xf0\xaa\x56\x54" "\x31\xb6\xab\xe5\x85\xd7\x5d\xb0\x4d\x1c\x9b\xa0\xb9\xde\x4a\xe8\xb0\xd3" "\x13\x2b\xc6\x81\x0c\xc9\xa6\x93\x97\x9f\x55\x17\x4a\x72\xe1\xdf\x9f\xde" "\xf3\x5b\xc4\x70\xf9\xe6\xe5\x91\x98\x27\x57\xf4\x5c\x52\xc6\x45\xd8\x91" "\xbf\x63\xbb\x21\xfb\x66\x92\x6e\xbe\x1a\x85\x25\x61\x1f\xc3\xe8\xbb\x87" "\x95\xc3\x6d\xc2\xa8\x6b\x5a\xb4\x6f\xf3\x3c\xc7\x4f\x61\x75\x1b\x2d\xae" "\x92\x67\x6d\xb8\x5c\x8d\x0c\x72\x1b\x7e\xa4\x54\x4b\xf5\x1c\x95\xc8\x6f" "\xca\xc1\xf4\x34\xd0\x9d\x1e\xe4\x92\x8a\xaf\xe2\x3d\xe6\x6f\xed\x97\x2e" "\x0d\xdd\xfb\x33\xf6\x4e\x48\x70\x1b\x04\x92\x39\xe7\xf5\x52\xd8\x16\x44" "\x1d\x11\xc4\xc2\x64\x7c\x01\x44\x62\x34\x43\x59\x19\x8d\x97\xc4\xb6\xe9" "\xed\x31\xca\x18\x98\x7b\x64\xde\x07\x9b\x2b\xed\x64\x1e\x8a\x92\xf1\x3c" "\xa7\x08\x44\xc6\x5c\xb4\x23\xd0\x19\x50\xb0\xeb\xf4\x4b\xd2\x8e\x09\xc0" "\x5d\x9a\xe5\xdd\x68\x9f\xb8\x80\xfb\x18\xd0\x42\x21\x9f\x5a\xc6\x0c\x3a" "\x03\xb0\x85\xab\xf3\xe8\xe3\xef\xc8\x42\xa8\xd3\x28\x73\x34\x61\xf0\x4c" "\x99\x60\x70\x61\xc6\x5e\xd1\x4c\x61\x32\x2a\x5a\xc2\xd3\x71\xa9\x5b\x8a" "\xd8\x67\x85\x7e\xd1\x3a\x4f\xa4\xae\x03\x3a\x09\x67\x38\x66\xcd\x77\xf4" "\xbc\xda\xaa\x05\x20\x71\x66\xb1\x9a\x87\x58\xd8\x85\x54\x00\xd8\xc6\xa7" "\x24\x2d\xc2\x07\x25\x1e\x87\x97\xec\xa2\x4e\xa4\xf4\x87\x66\x3e\x60\xf2" "\xf5\xe1\xf1\x42\x49\x58\xfd\x14\x8f\x84\x68\x30\xe8\x8a\x42\xd9\x3e\x1f" "\xe9\xc0\xb4\xa4\xa2\x68\x92\x17\x38\x93\x8a\xa9\xf3\xcb\x38\x11\xac\x87" "\xc5\x4c\x8e\xbc\x8b\xcf\xb4\x61\x3c\xc3\xa9\x97\xff\x15\x79\xed\xbd\x4a" "\xde\x80\x20\xe3\xad\x00\x1b\x07\x2b\x1a\x75\x1b\x58\x8a\xc4\x63\x9f\x35" "\xa5\x8e\x00\xa5\x0c\x02\x70\x60\x8c\x7a\x7f\x10\x13\x2b\x1c\x25\xb9\xea" "\x81\x23\x2f\xbe\xf6\x65\xf6\x21\x2f\x87\x5b\x2a\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\xa8\xfa\x2c\x95\xaa\xf6\x84\x98\xb7\x77\x15\x96\xa1\x01\xee" "\xb6\xbe\x2b\xe5\x2b\x52\x1b\x21\xe3\x19\xd2\x55\x20\x90\x58\xe8\x5d\xd1" "\x7a\xc7\x8b\x49\x8c\xf1\xbd\x2c\x46\x88\x1d\x6a\x70\x0b\xd3\xc4\x53\x74" "\x4d\x87\xf6\xc8\xb6\xb7\xf1\x9e\x5d\x1a\xcc\xfa\x5b\xf7\x03\x4e\xe0\x9d" "\x6c\x60\xec\xff\x10\x85\x90\xc2\x2f\x17\x57\x4e\x52\x92\x3f\x4d\xaa\x01" "\x93\x1c\x2a\x6b\x10\x31\xec\xd0\x21\x55\x94", 3701); *(uint64_t*)0x20000090 = 0x20000380; memcpy((void*)0x20000380, "GPL\000", 4); *(uint32_t*)0x20000098 = 0; *(uint32_t*)0x2000009c = 0; *(uint64_t*)0x200000a0 = 0; *(uint32_t*)0x200000a8 = 0; *(uint32_t*)0x200000ac = 0; memset((void*)0x200000b0, 0, 16); *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0; *(uint32_t*)0x200000c8 = -1; *(uint32_t*)0x200000cc = 8; *(uint64_t*)0x200000d0 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x200000d8 = 8; *(uint32_t*)0x200000dc = 0x10; *(uint64_t*)0x200000e0 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0; *(uint32_t*)0x2000000c = 0; *(uint32_t*)0x200000e8 = 0x10; *(uint32_t*)0x200000ec = 0; *(uint32_t*)0x200000f0 = -1; *(uint32_t*)0x200000f4 = 0; *(uint64_t*)0x200000f8 = 0; *(uint64_t*)0x20000100 = 0; *(uint32_t*)0x20000108 = 0x10; *(uint32_t*)0x2000010c = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000080ul, /*size=*/0x2eul); if (res != -1) r[0] = res; *(uint64_t*)0x200001c0 = 0x20000140; memcpy((void*)0x20000140, "contention_begin\000", 17); *(uint32_t*)0x200001c8 = r[0]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200001c0ul, /*size=*/0x10ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); for (procid = 0; procid < 6; procid++) { if (fork() == 0) { loop(); } } sleep(1000000); return 0; }