// https://syzkaller.appspot.com/bug?id=b7af30c12c7d85560f019a2eef5cb59628c72a2a // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #ifndef __NR_mkdirat #define __NR_mkdirat 296 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_mount #define __NR_mount 21 #endif #ifndef __NR_openat #define __NR_openat 295 #endif #ifndef __NR_write #define __NR_write 4 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 uint64_t r[1] = {0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x7ffff000, /*len=*/0x1000, /*prot=*/0, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32, /*fd=*/(intptr_t)-1, /*offset=*/0); syscall(__NR_mmap, /*addr=*/0x80000000, /*len=*/0x1000000, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32, /*fd=*/(intptr_t)-1, /*offset=*/0); syscall(__NR_mmap, /*addr=*/0x81000000, /*len=*/0x1000, /*prot=*/0, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32, /*fd=*/(intptr_t)-1, /*offset=*/0); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // mode: open_mode = 0x1ed (4 bytes) // ] memcpy((void*)0x80000000, "./sys\000", 6); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x80000000, /*mode=S_IXOTH|S_IROTH|S_IXGRP|S_IRGRP|S_IXUSR|S_IWUSR|S_IRUSR*/ 0x1ed); // mount arguments: [ // src: nil // dst: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // type: ptr[in, buffer] { // buffer: {73 79 73 66 73 00} (length 0x6) // } // flags: mount_flags = 0x0 (4 bytes) // data: nil // ] memcpy((void*)0x80000080, "./sys\000", 6); memcpy((void*)0x800000c0, "sysfs\000", 6); syscall(__NR_mount, /*src=*/0, /*dst=*/0x80000080, /*type=*/0x800000c0, /*flags=*/0, /*data=*/0); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 2f 62 75 73 2f 61 63 70 69 2f 75 65 76 65 6e // 74 00} (length 0x16) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x80000500, "./sys/bus/acpi/uevent\000", 22); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x80000500, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[0] = res; // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {61 64 64 00} (length 0x4) // } // count: len = 0xff0a (4 bytes) // ] memcpy((void*)0x80000280, "add\000", 4); syscall(__NR_write, /*fd=*/(intptr_t)r[0], /*buf=*/0x80000280, /*count=*/0xff0a); return 0; }