// https://syzkaller.appspot.com/bug?id=3e88b5df8fdc49f146a43dd72a03db2b744294c7 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #ifndef __NR_dup #define __NR_dup 23 #endif #ifndef __NR_mkdirat #define __NR_mkdirat 34 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_mount #define __NR_mount 40 #endif #ifndef __NR_pipe2 #define __NR_pipe2 59 #endif #ifndef __NR_setsockopt #define __NR_setsockopt 208 #endif #ifndef __NR_write #define __NR_write 64 #endif uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-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=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // pipe2$9p arguments: [ // pipefd: ptr[out, pipe_9p] { // pipe_9p { // rfd: rfd9p (resource) // wfd: wfd9p (resource) // } // } // flags: pipe_flags = 0x0 (8 bytes) // ] res = syscall(__NR_pipe2, /*pipefd=*/0x20000240ul, /*flags=*/0ul); if (res != -1) { r[0] = *(uint32_t*)0x20000240; r[1] = *(uint32_t*)0x20000244; } // write$P9_RVERSION arguments: [ // fd: wfd9p (resource) // data: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {15 00 00 00 65 ff ff 09 7b 00 00 08 00 39 50 32 // 30 30 30 2e 4c} (length 0x15) // } // } // } // size: bytesize = 0x15 (8 bytes) // ] memcpy((void*)0x20000080, "\x15\x00\x00\x00\x65\xff\xff\x09\x7b\x00\x00\x08\x00\x39\x50\x32\x30" "\x30\x30\x2e\x4c", 21); syscall(__NR_write, /*fd=*/r[1], /*data=*/0x20000080ul, /*size=*/0x15ul); // setsockopt$packet_rx_ring arguments: [ // fd: sock_packet (resource) // level: const = 0x107 (4 bytes) // optname: const = 0x5 (4 bytes) // optval: ptr[in, tpacket_req_u] { // union tpacket_req_u { // req: tpacket_req { // tp_block_size: int32 = 0x4 (4 bytes) // tp_block_nr: int32 = 0x80000000 (4 bytes) // tp_frame_size: int32 = 0x1 (4 bytes) // tp_frame_nr: int32 = 0x81 (4 bytes) // } // } // } // optlen: len = 0x10 (8 bytes) // ] *(uint32_t*)0x20000140 = 4; *(uint32_t*)0x20000144 = 0x80000000; *(uint32_t*)0x20000148 = 1; *(uint32_t*)0x2000014c = 0x81; syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/0x107, /*optname=*/5, /*optval=*/0x20000140ul, /*optlen=*/0x10ul); // dup arguments: [ // oldfd: fd (resource) // ] // returns fd res = syscall(__NR_dup, /*oldfd=*/r[1]); if (res != -1) r[2] = res; // write$FUSE_BMAP arguments: [ // fd: fd_fuse (resource) // arg: ptr[in, fuse_out_t[fuse_unique, fuse_bmap_out]] { // fuse_out_t[fuse_unique, fuse_bmap_out] { // len: len = 0x18 (4 bytes) // err: fuse_errors = 0x0 (4 bytes) // unique: fuse_unique (resource) // payload: fuse_bmap_out { // block: int64 = 0x0 (8 bytes) // } // } // } // len: bytesize = 0x18 (8 bytes) // ] *(uint32_t*)0x20000100 = 0x18; *(uint32_t*)0x20000104 = 0; *(uint64_t*)0x20000108 = 0; *(uint64_t*)0x20000110 = 0; syscall(__NR_write, /*fd=*/r[2], /*arg=*/0x20000100ul, /*len=*/0x18ul); // write$FUSE_DIRENTPLUS arguments: [ // fd: fd_fuse (resource) // arg: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {b0 00 00 00 00 00 00 00 16 59 ec 08 89 41 94 29 // aa 5d b9 72 88 b0 f8 a8 7e a8 e6 6d 9a 8b} (length 0x1e) // } // } // } // len: bytesize = 0xb0 (8 bytes) // ] memcpy((void*)0x20002100, "\xb0\x00\x00\x00\x00\x00\x00\x00\x16\x59\xec\x08\x89\x41\x94\x29\xaa" "\x5d\xb9\x72\x88\xb0\xf8\xa8\x7e\xa8\xe6\x6d\x9a\x8b", 30); syscall(__NR_write, /*fd=*/r[2], /*arg=*/0x20002100ul, /*len=*/0xb0ul); // write$FUSE_DIRENTPLUS arguments: [ // fd: fd_fuse (resource) // arg: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {10} (length 0x1) // } // } // } // len: bytesize = 0x10 (8 bytes) // ] memset((void*)0x20000140, 16, 1); syscall(__NR_write, /*fd=*/r[2], /*arg=*/0x20000140ul, /*len=*/0x10ul); // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // mode: open_mode = 0x0 (8 bytes) // ] memcpy((void*)0x20000000, "./file0\000", 8); syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x20000000ul, /*mode=*/0ul); // mount$9p_fd arguments: [ // src: const = 0x0 (8 bytes) // dst: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // type: ptr[in, buffer] { // buffer: {39 70 00} (length 0x3) // } // flags: mount_flags = 0x0 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {74 72 61 6e 73 3d 66 64 2c 72 66 64 6e 6f 3d} // (length 0xf) // } // union ANYUNION { // ANYRESHEX: ANYRES64 (resource) // } // union ANYUNION { // ANYBLOB: buffer: {2c 77 66 64 6e 6f 3d} (length 0x7) // } // union ANYUNION { // ANYRESHEX: ANYRES64 (resource) // } // union ANYUNION { // ANYBLOB: buffer: {2c 70 6f 73 69 78 61 63 6c} (length 0x9) // } // } // } // ] memcpy((void*)0x200003c0, "./file0\000", 8); memcpy((void*)0x20000b80, "9p\000", 3); memcpy((void*)0x20000580, "trans=fd,rfdno=", 15); sprintf((char*)0x2000058f, "0x%016llx", (long long)r[0]); memcpy((void*)0x200005a1, ",wfdno=", 7); sprintf((char*)0x200005a8, "0x%016llx", (long long)r[2]); memcpy((void*)0x200005ba, ",posixacl", 9); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200003c0ul, /*type=*/0x20000b80ul, /*flags=*/0ul, /*opts=*/0x20000580ul); return 0; }