mirror of
https://github.com/bytecodealliance/wasm-micro-runtime.git
synced 2024-10-16 13:02:32 +00:00
Fix wasi ctx memory free issue when app heap is corrupted (#455)
This commit is contained in:
Wenyong Huang
GitHub
parent
282831eba5
commit
0700dc9cd4
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@ -1654,26 +1654,20 @@ wasm_runtime_init_wasi(WASMModuleInstanceCommon *module_inst,
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char *error_buf, uint32 error_buf_size)
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{
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WASIContext *wasi_ctx;
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size_t *argv_offsets = NULL;
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char *argv_buf = NULL;
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size_t *env_offsets = NULL;
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char **argv_list = NULL;
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char *env_buf = NULL;
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uint64 argv_buf_len = 0, env_buf_len = 0;
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char **env_list = NULL;
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uint64 argv_buf_size = 0, env_buf_size = 0, total_size;
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uint32 argv_buf_offset = 0, env_buf_offset = 0;
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struct fd_table *curfds;
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struct fd_prestats *prestats;
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struct argv_environ_values *argv_environ;
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struct fd_table *curfds = NULL;
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struct fd_prestats *prestats = NULL;
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struct argv_environ_values *argv_environ = NULL;
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bool fd_table_inited = false, fd_prestats_inited = false;
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bool argv_environ_inited = false;
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uint32 offset_argv_offsets = 0, offset_env_offsets = 0;
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uint32 offset_argv_buf = 0, offset_env_buf = 0;
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uint32 offset_curfds = 0;
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uint32 offset_prestats = 0;
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uint32 offset_argv_environ = 0;
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__wasi_fd_t wasm_fd = 3;
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int32 raw_fd;
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char *path, resolved_path[PATH_MAX];
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uint64 total_size;
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uint32 i;
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if (!(wasi_ctx = runtime_malloc(sizeof(WASIContext), NULL,
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@ -1697,60 +1691,49 @@ wasm_runtime_init_wasi(WASMModuleInstanceCommon *module_inst,
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/* process argv[0], trip the path and suffix, only keep the program name */
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for (i = 0; i < argc; i++)
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argv_buf_len += strlen(argv[i]) + 1;
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argv_buf_size += strlen(argv[i]) + 1;
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total_size = sizeof(size_t) * (uint64)argc;
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total_size = sizeof(char *) * (uint64)argc;
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if (total_size >= UINT32_MAX
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|| !(offset_argv_offsets = wasm_runtime_module_malloc
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(module_inst, (uint32)total_size,
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(void**)&argv_offsets))
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|| argv_buf_len >= UINT32_MAX
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|| !(offset_argv_buf = wasm_runtime_module_malloc
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(module_inst, (uint32)argv_buf_len,
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(void**)&argv_buf))) {
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|| !(argv_list = wasm_runtime_malloc((uint32)total_size))
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|| argv_buf_size >= UINT32_MAX
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|| !(argv_buf = wasm_runtime_malloc((uint32)argv_buf_size))) {
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set_error_buf(error_buf, error_buf_size,
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"Init wasi environment failed: allocate memory failed");
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goto fail;
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}
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for (i = 0; i < argc; i++) {
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argv_offsets[i] = argv_buf_offset;
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argv_list[i] = argv_buf + argv_buf_offset;
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bh_strcpy_s(argv_buf + argv_buf_offset,
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(uint32)argv_buf_len - argv_buf_offset, argv[i]);
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(uint32)argv_buf_size - argv_buf_offset, argv[i]);
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argv_buf_offset += (uint32)(strlen(argv[i]) + 1);
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}
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for (i = 0; i < env_count; i++)
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env_buf_len += strlen(env[i]) + 1;
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env_buf_size += strlen(env[i]) + 1;
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total_size = sizeof(size_t) * (uint64)argc;
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total_size = sizeof(char *) * (uint64)argc;
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if (total_size >= UINT32_MAX
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|| !(offset_env_offsets = wasm_runtime_module_malloc
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(module_inst, (uint32)total_size,
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(void**)&env_offsets))
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|| env_buf_len >= UINT32_MAX
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|| !(offset_env_buf = wasm_runtime_module_malloc
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(module_inst, (uint32)env_buf_len,
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(void**)&env_buf))) {
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|| !(env_list = wasm_runtime_malloc((uint32)total_size))
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|| env_buf_size >= UINT32_MAX
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|| !(env_buf = wasm_runtime_malloc((uint32)env_buf_size))) {
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set_error_buf(error_buf, error_buf_size,
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"Init wasi environment failed: allocate memory failed");
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goto fail;
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}
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for (i = 0; i < env_count; i++) {
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env_offsets[i] = env_buf_offset;
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env_list[i] = env_buf + env_buf_offset;
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bh_strcpy_s(env_buf + env_buf_offset,
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(uint32)env_buf_len - env_buf_offset, env[i]);
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(uint32)env_buf_size - env_buf_offset, env[i]);
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env_buf_offset += (uint32)(strlen(env[i]) + 1);
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}
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if (!(offset_curfds = wasm_runtime_module_malloc
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(module_inst, sizeof(struct fd_table), (void**)&curfds))
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|| !(offset_prestats = wasm_runtime_module_malloc
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(module_inst, sizeof(struct fd_prestats), (void**)&prestats))
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|| !(offset_argv_environ = wasm_runtime_module_malloc
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(module_inst, sizeof(struct argv_environ_values),
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(void**)&argv_environ))) {
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if (!(curfds = wasm_runtime_malloc(sizeof(struct fd_table)))
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|| !(prestats = wasm_runtime_malloc(sizeof(struct fd_prestats)))
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|| !(argv_environ =
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wasm_runtime_malloc(sizeof(struct argv_environ_values)))) {
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set_error_buf(error_buf, error_buf_size,
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"Init wasi environment failed: allocate memory failed");
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goto fail;
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@ -1773,10 +1756,10 @@ wasm_runtime_init_wasi(WASMModuleInstanceCommon *module_inst,
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fd_prestats_inited = true;
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if (!argv_environ_init(argv_environ,
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argv_offsets, argc,
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argv_buf, argv_buf_len,
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env_offsets, env_count,
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env_buf, env_buf_len)) {
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argv_buf, argv_buf_size,
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argv_list, argc,
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env_buf, env_buf_size,
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env_list, env_count)) {
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set_error_buf(error_buf, error_buf_size,
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"Init wasi environment failed: "
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"init argument environment failed");
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@ -1817,13 +1800,13 @@ wasm_runtime_init_wasi(WASMModuleInstanceCommon *module_inst,
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fd_prestats_insert(prestats, dir_list[i], wasm_fd);
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}
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wasi_ctx->curfds_offset = offset_curfds;
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wasi_ctx->prestats_offset = offset_prestats;
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wasi_ctx->argv_environ_offset = offset_argv_environ;
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wasi_ctx->argv_buf_offset = offset_argv_buf;
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wasi_ctx->argv_offsets_offset = offset_argv_offsets;
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wasi_ctx->env_buf_offset = offset_env_buf;
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wasi_ctx->env_offsets_offset = offset_env_offsets;
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wasi_ctx->curfds = curfds;
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wasi_ctx->prestats = prestats;
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wasi_ctx->argv_environ = argv_environ;
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wasi_ctx->argv_buf = argv_buf;
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wasi_ctx->argv_list = argv_list;
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wasi_ctx->env_buf = env_buf;
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wasi_ctx->env_list = env_list;
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return true;
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@ -1834,20 +1817,20 @@ fail:
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fd_prestats_destroy(prestats);
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if (fd_table_inited)
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fd_table_destroy(curfds);
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if (offset_curfds != 0)
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wasm_runtime_module_free(module_inst, offset_curfds);
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if (offset_prestats != 0)
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wasm_runtime_module_free(module_inst, offset_prestats);
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if (offset_argv_environ != 0)
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wasm_runtime_module_free(module_inst, offset_argv_environ);
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if (offset_argv_buf)
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wasm_runtime_module_free(module_inst, offset_argv_buf);
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if (offset_argv_offsets)
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wasm_runtime_module_free(module_inst, offset_argv_offsets);
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if (offset_env_buf)
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wasm_runtime_module_free(module_inst, offset_env_buf);
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if (offset_env_offsets)
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wasm_runtime_module_free(module_inst, offset_env_offsets);
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if (curfds)
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wasm_runtime_free(curfds);
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if (prestats)
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wasm_runtime_free(prestats);
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if (argv_environ)
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wasm_runtime_free(argv_environ);
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if (argv_buf)
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wasm_runtime_free(argv_buf);
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if (argv_list)
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wasm_runtime_free(argv_list);
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if (env_buf)
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wasm_runtime_free(env_buf);
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if (env_list)
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wasm_runtime_free(env_list);
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return false;
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}
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@ -1921,40 +1904,28 @@ void
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wasm_runtime_destroy_wasi(WASMModuleInstanceCommon *module_inst)
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{
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WASIContext *wasi_ctx = wasm_runtime_get_wasi_ctx(module_inst);
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struct argv_environ_values *argv_environ;
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struct fd_table *curfds;
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struct fd_prestats *prestats;
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if (wasi_ctx) {
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if (wasi_ctx->argv_environ_offset) {
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argv_environ = (struct argv_environ_values *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->argv_environ_offset);
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argv_environ_destroy(argv_environ);
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wasm_runtime_module_free(module_inst, wasi_ctx->argv_environ_offset);
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if (wasi_ctx->argv_environ) {
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argv_environ_destroy(wasi_ctx->argv_environ);
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wasm_runtime_free(wasi_ctx->argv_environ);
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}
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if (wasi_ctx->curfds_offset) {
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curfds = (struct fd_table *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->curfds_offset);
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fd_table_destroy(curfds);
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wasm_runtime_module_free(module_inst, wasi_ctx->curfds_offset);
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if (wasi_ctx->curfds) {
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fd_table_destroy(wasi_ctx->curfds);
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wasm_runtime_free(wasi_ctx->curfds);
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}
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if (wasi_ctx->prestats_offset) {
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prestats = (struct fd_prestats *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->prestats_offset);
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fd_prestats_destroy(prestats);
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wasm_runtime_module_free(module_inst, wasi_ctx->prestats_offset);
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if (wasi_ctx->prestats) {
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fd_prestats_destroy(wasi_ctx->prestats);
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wasm_runtime_free(wasi_ctx->prestats);
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}
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if (wasi_ctx->argv_buf_offset)
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wasm_runtime_module_free(module_inst, wasi_ctx->argv_buf_offset);
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if (wasi_ctx->argv_offsets_offset)
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wasm_runtime_module_free(module_inst, wasi_ctx->argv_offsets_offset);
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if (wasi_ctx->env_buf_offset)
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wasm_runtime_module_free(module_inst, wasi_ctx->env_buf_offset);
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if (wasi_ctx->env_offsets_offset)
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wasm_runtime_module_free(module_inst, wasi_ctx->env_offsets_offset);
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if (wasi_ctx->argv_buf)
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wasm_runtime_free(wasi_ctx->argv_buf);
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if (wasi_ctx->argv_list)
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wasm_runtime_free(wasi_ctx->argv_list);
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if (wasi_ctx->env_buf)
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wasm_runtime_free(wasi_ctx->env_buf);
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if (wasi_ctx->env_list)
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wasm_runtime_free(wasi_ctx->env_list);
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wasm_runtime_free(wasi_ctx);
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}
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}
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@ -74,17 +74,13 @@ typedef struct WASMModuleInstMemConsumption {
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#if WASM_ENABLE_LIBC_WASI != 0
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typedef struct WASIContext {
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/* Use offset but not native address, since these fields are
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allocated from app's heap, and the heap space may be re-allocated
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after memory.grow opcode is executed, the original native address
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cannot be accessed again. */
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uint32 curfds_offset;
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uint32 prestats_offset;
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uint32 argv_environ_offset;
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uint32 argv_buf_offset;
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uint32 argv_offsets_offset;
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uint32 env_buf_offset;
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uint32 env_offsets_offset;
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struct fd_table *curfds;
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struct fd_prestats *prestats;
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struct argv_environ_values *argv_environ;
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char *argv_buf;
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char **argv_list;
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char *env_buf;
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char **env_list;
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} WASIContext;
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#endif
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@ -45,49 +45,43 @@ typedef struct iovec_app {
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} iovec_app_t;
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typedef struct WASIContext {
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uint32 curfds_offset;
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uint32 prestats_offset;
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uint32 argv_environ_offset;
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uint32 argv_buf_offset;
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uint32 argv_offsets_offset;
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uint32 env_buf_offset;
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uint32 env_offsets_offset;
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struct fd_table *curfds;
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struct fd_prestats *prestats;
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struct argv_environ_values *argv_environ;
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char *argv_buf;
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char **argv_list;
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char *env_buf;
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char **env_list;
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} *wasi_ctx_t;
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wasi_ctx_t
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wasm_runtime_get_wasi_ctx(wasm_module_inst_t module_inst);
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static struct fd_table *
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static inline struct fd_table *
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wasi_ctx_get_curfds(wasm_module_inst_t module_inst,
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wasi_ctx_t wasi_ctx)
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{
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if (!wasi_ctx)
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return NULL;
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return (struct fd_table *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->curfds_offset);
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return wasi_ctx->curfds;
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}
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static struct argv_environ_values *
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static inline struct argv_environ_values *
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wasi_ctx_get_argv_environ(wasm_module_inst_t module_inst,
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wasi_ctx_t wasi_ctx)
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{
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if (!wasi_ctx)
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return NULL;
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return (struct argv_environ_values *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->argv_environ_offset);
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return wasi_ctx->argv_environ;
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}
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static struct fd_prestats *
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static inline struct fd_prestats *
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wasi_ctx_get_prestats(wasm_module_inst_t module_inst,
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wasi_ctx_t wasi_ctx)
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{
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if (!wasi_ctx)
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return NULL;
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return (struct fd_prestats *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->prestats_offset);
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return wasi_ctx->prestats;
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}
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static wasi_errno_t
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@ -152,9 +146,7 @@ wasi_args_sizes_get(wasm_exec_env_t exec_env,
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|| !validate_native_addr(argv_buf_size_app, sizeof(uint32)))
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return (wasi_errno_t)-1;
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argv_environ = (struct argv_environ_values *)
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wasm_runtime_addr_app_to_native(module_inst,
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wasi_ctx->argv_environ_offset);
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argv_environ = wasi_ctx->argv_environ;
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err = wasmtime_ssp_args_sizes_get(argv_environ,
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&argc, &argv_buf_size);
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@ -2822,7 +2822,7 @@ __wasi_errno_t wasmtime_ssp_args_get(
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char *argv_buf
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) {
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for (size_t i = 0; i < argv_environ->argc; ++i) {
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argv[i] = argv_buf + (argv_environ->argv[i] - argv_environ->argv_buf);
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argv[i] = argv_buf + (argv_environ->argv_list[i] - argv_environ->argv_buf);
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}
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argv[argv_environ->argc] = NULL;
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bh_memcpy_s(argv_buf, (uint32)argv_environ->argv_buf_size,
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@ -2850,7 +2850,7 @@ __wasi_errno_t wasmtime_ssp_environ_get(
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char *environ_buf
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) {
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for (size_t i = 0; i < argv_environ->environ_count; ++i) {
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environ[i] = environ_buf + (argv_environ->environ[i] - argv_environ->environ_buf);
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environ[i] = environ_buf + (argv_environ->environ_list[i] - argv_environ->environ_buf);
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}
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environ[argv_environ->environ_count] = NULL;
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bh_memcpy_s(environ_buf, (uint32)argv_environ->environ_buf_size,
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@ -2871,76 +2871,26 @@ __wasi_errno_t wasmtime_ssp_environ_sizes_get(
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}
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bool argv_environ_init(struct argv_environ_values *argv_environ,
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const size_t *argv_offsets, size_t argv_offsets_len,
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const char *argv_buf, size_t argv_buf_len,
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const size_t *environ_offsets, size_t environ_offsets_len,
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const char *environ_buf, size_t environ_buf_len)
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char *argv_buf, size_t argv_buf_size,
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char **argv_list, size_t argc,
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char *environ_buf, size_t environ_buf_size,
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char **environ_list, size_t environ_count)
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{
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uint64 total_size;
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size_t i;
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memset(argv_environ, 0, sizeof(struct argv_environ_values));
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argv_environ->argc = argv_offsets_len;
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argv_environ->argv_buf_size = argv_buf_len;
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total_size = sizeof(char *) * (uint64)argv_offsets_len;
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if (total_size >= UINT32_MAX
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|| !(argv_environ->argv = wasm_runtime_malloc((uint32)total_size)))
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return false;
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||||
|
||||
if (argv_buf_len >= UINT32_MAX
|
||||
|| !(argv_environ->argv_buf = wasm_runtime_malloc((uint32)argv_buf_len)))
|
||||
goto fail1;
|
||||
|
||||
for (i = 0; i < argv_offsets_len; ++i) {
|
||||
argv_environ->argv[i] = argv_environ->argv_buf + argv_offsets[i];
|
||||
}
|
||||
bh_memcpy_s(argv_environ->argv_buf, (uint32)argv_buf_len,
|
||||
argv_buf, (uint32)argv_buf_len);
|
||||
|
||||
argv_environ->environ_count = environ_offsets_len;
|
||||
argv_environ->environ_buf_size = environ_buf_len;
|
||||
|
||||
total_size = sizeof(char *) * (uint64)environ_offsets_len;
|
||||
if (total_size >= UINT32_MAX
|
||||
|| !(argv_environ->environ = wasm_runtime_malloc((uint32)total_size)))
|
||||
goto fail2;
|
||||
|
||||
if (environ_buf_len >= UINT32_MAX
|
||||
|| !(argv_environ->environ_buf = wasm_runtime_malloc((uint32)environ_buf_len)))
|
||||
goto fail3;
|
||||
|
||||
for (i = 0; i < environ_offsets_len; ++i) {
|
||||
argv_environ->environ[i] = argv_environ->environ_buf + environ_offsets[i];
|
||||
}
|
||||
bh_memcpy_s(argv_environ->environ_buf, (uint32)environ_buf_len,
|
||||
environ_buf, (uint32)environ_buf_len);
|
||||
|
||||
argv_environ->argv_buf = argv_buf;
|
||||
argv_environ->argv_buf_size = argv_buf_size;
|
||||
argv_environ->argv_list = argv_list;
|
||||
argv_environ->argc = argc;
|
||||
argv_environ->environ_buf = environ_buf;
|
||||
argv_environ->environ_buf_size = environ_buf_size;
|
||||
argv_environ->environ_list = environ_list;
|
||||
argv_environ->environ_count = environ_count;
|
||||
return true;
|
||||
|
||||
fail3:
|
||||
wasm_runtime_free(argv_environ->environ);
|
||||
fail2:
|
||||
wasm_runtime_free(argv_environ->argv_buf);
|
||||
fail1:
|
||||
wasm_runtime_free(argv_environ->argv);
|
||||
|
||||
memset(argv_environ, 0, sizeof(struct argv_environ_values));
|
||||
return false;
|
||||
}
|
||||
|
||||
void argv_environ_destroy(struct argv_environ_values *argv_environ)
|
||||
{
|
||||
if (argv_environ->argv_buf)
|
||||
wasm_runtime_free(argv_environ->argv_buf);
|
||||
if (argv_environ->argv)
|
||||
wasm_runtime_free(argv_environ->argv);
|
||||
if (argv_environ->environ_buf)
|
||||
wasm_runtime_free(argv_environ->environ_buf);
|
||||
if (argv_environ->environ)
|
||||
wasm_runtime_free(argv_environ->environ);
|
||||
}
|
||||
|
||||
void fd_table_destroy(struct fd_table *ft)
|
||||
|
|
|
|||
|
|
@ -34,25 +34,25 @@ struct fd_prestats {
|
|||
};
|
||||
|
||||
struct argv_environ_values {
|
||||
size_t argc;
|
||||
const char *argv_buf;
|
||||
size_t argv_buf_size;
|
||||
char **argv;
|
||||
char *argv_buf;
|
||||
size_t environ_count;
|
||||
size_t environ_buf_size;
|
||||
char **environ;
|
||||
char **argv_list;
|
||||
size_t argc;
|
||||
char *environ_buf;
|
||||
size_t environ_buf_size;
|
||||
char **environ_list;
|
||||
size_t environ_count;
|
||||
};
|
||||
|
||||
bool fd_table_init(struct fd_table *);
|
||||
bool fd_table_insert_existing(struct fd_table *, __wasi_fd_t, int);
|
||||
bool fd_prestats_init(struct fd_prestats *);
|
||||
bool fd_prestats_insert(struct fd_prestats *, const char *, __wasi_fd_t);
|
||||
bool argv_environ_init(struct argv_environ_values *,
|
||||
const size_t *argv_offsets, size_t argv_offsets_len,
|
||||
const char *argv_buf, size_t argv_buf_len,
|
||||
const size_t *environ_offsets, size_t environ_offsets_len,
|
||||
const char *environ_buf, size_t environ_buf_len);
|
||||
bool argv_environ_init(struct argv_environ_values *argv_environ,
|
||||
char *argv_buf, size_t argv_buf_size,
|
||||
char **argv_list, size_t argc,
|
||||
char *environ_buf, size_t environ_buf_size,
|
||||
char **environ_list, size_t environ_count);
|
||||
void argv_environ_destroy(struct argv_environ_values *argv_environ);
|
||||
void fd_table_destroy(struct fd_table *ft);
|
||||
void fd_prestats_destroy(struct fd_prestats *pt);
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user