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Fix GH-16821: runtime error: member access within misaligned address when running phpseclib tests #16951

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Merged
merged 1 commit into from
Nov 26, 2024
Merged

Fix GH-16821: runtime error: member access within misaligned address when running phpseclib tests #16951

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35 changes: 29 additions & 6 deletions ext/opcache/jit/zend_jit_ir.c
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Original file line number Diff line number Diff line change
Expand Up @@ -17381,8 +17381,15 @@ static void jit_frameless_icall2(zend_jit_ctx *jit, const zend_op *opline, uint3

jit_FREE_OP(jit, opline->op1_type, opline->op1, op1_info, NULL);
/* Set OP1 to UNDEF in case FREE_OP2() throws. */
if ((opline->op1_type & (IS_VAR|IS_TMP_VAR)) != 0 && (opline->op2_type & (IS_VAR|IS_TMP_VAR)) != 0) {
if ((opline->op1_type & (IS_VAR|IS_TMP_VAR)) != 0
&& (opline->op2_type & (IS_VAR|IS_TMP_VAR)) != 0
&& (op2_info & MAY_BE_RC1)
&& (op2_info & (MAY_BE_OBJECT|MAY_BE_RESOURCE|MAY_BE_ARRAY_OF_OBJECT|MAY_BE_ARRAY_OF_RESOURCE|MAY_BE_ARRAY_OF_ARRAY))) {
jit_set_Z_TYPE_INFO(jit, op1_addr, IS_UNDEF);
if (JIT_G(current_frame)) {
SET_STACK_TYPE(JIT_G(current_frame)->stack,
EX_VAR_TO_NUM(opline->op1.var), IS_UNKNOWN, 1);
}
}
jit_FREE_OP(jit, opline->op2_type, opline->op2, op2_info, NULL);
zend_jit_check_exception(jit);
Expand Down Expand Up @@ -17455,18 +17462,34 @@ static void jit_frameless_icall3(zend_jit_ctx *jit, const zend_op *opline, uint3

jit_FREE_OP(jit, opline->op1_type, opline->op1, op1_info, NULL);
/* Set OP1 to UNDEF in case FREE_OP2() throws. */
bool op1_undef = false;
if ((opline->op1_type & (IS_VAR|IS_TMP_VAR))
&& ((opline->op2_type & (IS_VAR|IS_TMP_VAR))
|| (op_data_type & (IS_VAR|IS_TMP_VAR)))) {
&& (((opline->op2_type & (IS_VAR|IS_TMP_VAR))
&& (op2_info & MAY_BE_RC1)
&& (op2_info & (MAY_BE_OBJECT|MAY_BE_RESOURCE|MAY_BE_ARRAY_OF_OBJECT|MAY_BE_ARRAY_OF_RESOURCE|MAY_BE_ARRAY_OF_ARRAY)))
|| ((op_data_type & (IS_VAR|IS_TMP_VAR))
&& (op1_data_info & MAY_BE_RC1)
&& (op1_data_info & (MAY_BE_OBJECT|MAY_BE_RESOURCE|MAY_BE_ARRAY_OF_OBJECT|MAY_BE_ARRAY_OF_RESOURCE|MAY_BE_ARRAY_OF_ARRAY))))) {
op1_undef = true;
jit_set_Z_TYPE_INFO(jit, op1_addr, IS_UNDEF);
if (JIT_G(current_frame)) {
SET_STACK_TYPE(JIT_G(current_frame)->stack,
EX_VAR_TO_NUM(opline->op1.var), IS_UNKNOWN, 1);
}
}
jit_FREE_OP(jit, opline->op2_type, opline->op2, op2_info, NULL);
/* If OP1 is a TMP|VAR, we don't need to set OP2 to UNDEF on free because
/* If OP1 is set to UNDEF, we don't need to set OP2 to UNDEF on free because
* zend_fetch_debug_backtrace aborts when it encounters the first UNDEF TMP|VAR. */
if (!(opline->op1_type & (IS_VAR|IS_TMP_VAR))
if (!op1_undef
&& (opline->op2_type & (IS_VAR|IS_TMP_VAR)) != 0
&& (op_data_type & (IS_VAR|IS_TMP_VAR)) != 0) {
&& (op_data_type & (IS_VAR|IS_TMP_VAR)) != 0
&& (op1_data_info & MAY_BE_RC1)
&& (op1_data_info & (MAY_BE_OBJECT|MAY_BE_RESOURCE|MAY_BE_ARRAY_OF_OBJECT|MAY_BE_ARRAY_OF_RESOURCE|MAY_BE_ARRAY_OF_ARRAY))) {
jit_set_Z_TYPE_INFO(jit, op2_addr, IS_UNDEF);
if (JIT_G(current_frame)) {
SET_STACK_TYPE(JIT_G(current_frame)->stack,
EX_VAR_TO_NUM(opline->op2.var), IS_UNKNOWN, 1);
}
}
jit_FREE_OP(jit, (opline+1)->op1_type, (opline+1)->op1, op1_data_info, NULL);
zend_jit_check_exception(jit);
Expand Down