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Fix issues reported by Coverity (#1775)

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Fix some issues reported by Coverity and fix windows exception
check with guard page issue
This commit is contained in:
Wenyong Huang 2022-12-01 19:24:13 +08:00 committed by GitHub
parent 6eaf779a2d
commit 1652f22a77
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 45 additions and 35 deletions
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61
core/iwasm/common/wasm_runtime_common.c
View File

@ -143,9 +143,9 @@ runtime_signal_handler(void *sig_addr)
WASMJmpBuf *jmpbuf_node;
uint8 *mapped_mem_start_addr = NULL;
uint8 *mapped_mem_end_addr = NULL;
uint32 page_size = os_getpagesize();
#if WASM_DISABLE_STACK_HW_BOUND_CHECK == 0
uint8 *stack_min_addr;
uint32 page_size;
uint32 guard_page_count = STACK_OVERFLOW_CHECK_GUARD_PAGE_COUNT;
#endif
@ -163,7 +163,6 @@ runtime_signal_handler(void *sig_addr)
#if WASM_DISABLE_STACK_HW_BOUND_CHECK == 0
/* Get stack info of current thread */
page_size = os_getpagesize();
stack_min_addr = os_thread_get_stack_boundary();
#endif
@ -216,29 +215,41 @@ runtime_exception_handler(EXCEPTION_POINTERS *exce_info)
mapped_mem_start_addr = memory_inst->memory_data;
mapped_mem_end_addr =
memory_inst->memory_data + 8 * (uint64)BH_GB;
if (mapped_mem_start_addr <= (uint8 *)sig_addr
&& (uint8 *)sig_addr < mapped_mem_end_addr) {
/* The address which causes segmentation fault is inside
the memory instance's guard regions.
Set exception and let the wasm func continue to run, when
the wasm func returns, the caller will check whether the
exception is thrown and return to runtime. */
wasm_set_exception(module_inst,
"out of bounds memory access");
if (module_inst->module_type == Wasm_Module_Bytecode) {
/* Continue to search next exception handler for
interpreter mode as it can be caught by
`__try { .. } __except { .. }` sentences in
wasm_runtime.c */
return EXCEPTION_CONTINUE_SEARCH;
}
else {
/* Skip current instruction and continue to run for
AOT mode. TODO: implement unwind support for AOT
code in Windows platform */
exce_info->ContextRecord->Rip++;
return EXCEPTION_CONTINUE_EXECUTION;
}
}
if (memory_inst && mapped_mem_start_addr <= (uint8 *)sig_addr
&& (uint8 *)sig_addr < mapped_mem_end_addr) {
/* The address which causes segmentation fault is inside
the memory instance's guard regions.
Set exception and let the wasm func continue to run, when
the wasm func returns, the caller will check whether the
exception is thrown and return to runtime. */
wasm_set_exception(module_inst, "out of bounds memory access");
if (module_inst->module_type == Wasm_Module_Bytecode) {
/* Continue to search next exception handler for
interpreter mode as it can be caught by
`__try { .. } __except { .. }` sentences in
wasm_runtime.c */
return EXCEPTION_CONTINUE_SEARCH;
}
else {
/* Skip current instruction and continue to run for
AOT mode. TODO: implement unwind support for AOT
code in Windows platform */
exce_info->ContextRecord->Rip++;
return EXCEPTION_CONTINUE_EXECUTION;
}
}
else if (exec_env_tls->exce_check_guard_page <= (uint8 *)sig_addr
&& (uint8 *)sig_addr
< exec_env_tls->exce_check_guard_page + page_size) {
bh_assert(wasm_get_exception(module_inst));
if (module_inst->module_type == Wasm_Module_Bytecode) {
return EXCEPTION_CONTINUE_SEARCH;
}
else {
exce_info->ContextRecord->Rip++;
return EXCEPTION_CONTINUE_EXECUTION;
}
}
}

1
core/iwasm/compilation/aot_emit_control.c
View File

@ -462,6 +462,7 @@ aot_compile_op_block(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
false, NULL, NULL))) {
goto fail;
}
aot_block_destroy(block);
return aot_handle_next_reachable_block(comp_ctx, func_ctx,
p_frame_ip);
}

3
core/iwasm/interpreter/wasm_mini_loader.c
View File

@ -5125,10 +5125,11 @@ copy_params_to_dynamic_space(WASMLoaderContext *loader_ctx, bool is_if_block,
/* Free the emit data */
wasm_runtime_free(emit_data);
return true;
fail:
/* Free the emit data */
wasm_runtime_free(emit_data);
return false;
}
#endif

9
core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
View File

@ -3081,14 +3081,15 @@ wasi_ssp_sock_addr_resolve(
size_t _max_info_size;
size_t actual_info_size;
if (!ns_lookup_list_search(ns_lookup_list, host)) {
return __WASI_EACCES;
}
if (!wamr_addr_info) {
return __WASI_ENOMEM;
}
if (!ns_lookup_list_search(ns_lookup_list, host)) {
wasm_runtime_free(wamr_addr_info);
return __WASI_EACCES;
}
int ret = os_socket_addr_resolve(
host, service, hints->hints_enabled ? &hints_is_tcp : NULL,
hints->hints_enabled ? &hints_is_ipv4 : NULL, wamr_addr_info,

6
samples/file/src/main.c
View File

@ -26,7 +26,6 @@ main(int argc, char *argv_main[])
wasm_module_inst_t module_inst = NULL;
wasm_exec_env_t exec_env = NULL;
uint32 buf_size, stack_size = 8092, heap_size = 8092;
uint32_t wasm_buffer = 0;
RuntimeInitArgs init_args;
memset(&init_args, 0, sizeof(RuntimeInitArgs));
@ -103,11 +102,8 @@ main(int argc, char *argv_main[])
fail:
if (exec_env)
wasm_runtime_destroy_exec_env(exec_env);
if (module_inst) {
if (wasm_buffer)
wasm_runtime_module_free(module_inst, wasm_buffer);
if (module_inst)
wasm_runtime_deinstantiate(module_inst);
}
if (module)
wasm_runtime_unload(module);
if (buffer)