// https://syzkaller.appspot.com/bug?id=f8c3dfd32fe2ddb2f383553cf0b41e1ea7c3c9da // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #ifndef __NR_fchdir #define __NR_fchdir 133 #endif #ifndef __NR_fsconfig #define __NR_fsconfig 431 #endif #ifndef __NR_fsmount #define __NR_fsmount 432 #endif #ifndef __NR_fsopen #define __NR_fsopen 430 #endif #ifndef __NR_mkdir #define __NR_mkdir 39 #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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 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)) { } // mkdir arguments: [ // path: ptr[in, buffer] { // buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9) // } // mode: open_mode = 0x1ff (4 bytes) // ] memcpy((void*)0x80000180, "./config\000", 9); syscall( __NR_mkdir, /*path=*/0x80000180, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1ff); // mount arguments: [ // src: nil // dst: ptr[in, buffer] { // buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9) // } // type: ptr[in, buffer] { // buffer: {63 6f 6e 66 69 67 66 73 00} (length 0x9) // } // flags: mount_flags = 0x0 (4 bytes) // data: nil // ] memcpy((void*)0x800001c0, "./config\000", 9); memcpy((void*)0x80000200, "configfs\000", 9); syscall(__NR_mount, /*src=*/0, /*dst=*/0x800001c0, /*type=*/0x80000200, /*flags=*/0, /*data=*/0); // mkdir arguments: [ // path: ptr[in, buffer] { // buffer: {2e 2f 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f // 67 31 00} (length 0x17) // } // mode: open_mode = 0x1ff (4 bytes) // ] memcpy((void*)0x80000240, "./config/usb_gadget/g1\000", 23); syscall( __NR_mkdir, /*path=*/0x80000240, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1ff); // mkdir arguments: [ // path: ptr[in, buffer] { // buffer: {2e 2f 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f // 67 31 2f 66 75 6e 63 74 69 6f 6e 73 2f 6d 61 73 73 5f 73 74 6f 72 61 // 67 65 2e 30 00} (length 0x30) // } // mode: open_mode = 0x1ff (4 bytes) // ] memcpy((void*)0x800002c0, "./config/usb_gadget/g1/functions/mass_storage.0\000", 48); syscall( __NR_mkdir, /*path=*/0x800002c0, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1ff); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f // 67 31 2f 66 75 6e 63 74 69 6f 6e 73 2f 6d 61 73 73 5f 73 74 6f 72 61 // 67 65 2e 30 2f 6c 75 6e 2e 30 2f 66 69 6c 65 00} (length 0x3b) // } // flags: open_flags = 0x2 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x80000380, "./config/usb_gadget/g1/functions/mass_storage.0/lun.0/file\000", 59); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x80000380, /*flags=O_RDWR*/ 2, /*mode=*/0); if (res != -1) r[0] = res; // fsopen arguments: [ // type: ptr[in, buffer] { // buffer: {63 6f 6e 66 69 67 66 73 00} (length 0x9) // } // flags: fsopen_flags = 0x1 (4 bytes) // ] // returns fd_fscontext memcpy((void*)0x80000180, "configfs\000", 9); res = syscall(__NR_fsopen, /*type=*/0x80000180, /*flags=FSOPEN_CLOEXEC*/ 1); if (res != -1) r[1] = res; // fsconfig$FSCONFIG_CMD_CREATE arguments: [ // fd: fd_fscontext (resource) // cmd: const = 0x6 (4 bytes) // key: const = 0x0 (4 bytes) // value: const = 0x0 (4 bytes) // aux: const = 0x0 (4 bytes) // ] syscall(__NR_fsconfig, /*fd=*/(intptr_t)r[1], /*cmd=*/6, /*key=*/0, /*value=*/0, /*aux=*/0); // fsmount arguments: [ // fs_fd: fd_fscontext (resource) // flags: fsmount_flags = 0x0 (4 bytes) // attr_flags: fsmount_attr_flags = 0x9 (4 bytes) // ] // returns fd res = syscall(__NR_fsmount, /*fs_fd=*/(intptr_t)r[1], /*flags=*/0, /*attr_flags=MOUNT_ATTR_NOEXEC|MOUNT_ATTR_RDONLY*/ 9); if (res != -1) r[2] = res; // fchdir arguments: [ // fd: fd (resource) // ] syscall(__NR_fchdir, /*fd=*/(intptr_t)r[2]); // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {66 69 6c 65 30} (length 0x5) // } // count: len = 0x5 (4 bytes) // ] memcpy((void*)0x800003c0, "file0", 5); syscall(__NR_write, /*fd=*/(intptr_t)r[0], /*buf=*/0x800003c0, /*count=*/5); return 0; }