diff options
| author | Bob Moore <robert.moore@intel.com> | 2008-04-10 19:06:37 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-04-22 14:29:21 -0400 |
| commit | 4b6e16cf2bacbf328535097fa74f1494b1873c54 (patch) | |
| tree | 5b81427d81577d7741d3d17dcc928a770decdbe0 /drivers/acpi/executer | |
| parent | 4e3156b183aa087bc19804b3295c7c1a71f64752 (diff) | |
ACPICA: Avoid use of invalid pointers in returned object field
During operand evaluation, ensure that the ReturnObj field is
cleared on error and only valid pointers are stored there.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/executer')
| -rw-r--r-- | drivers/acpi/executer/exoparg1.c | 1 | ||||
| -rw-r--r-- | drivers/acpi/executer/exoparg2.c | 19 | ||||
| -rw-r--r-- | drivers/acpi/executer/exoparg3.c | 1 | ||||
| -rw-r--r-- | drivers/acpi/executer/exoparg6.c | 8 |
4 files changed, 21 insertions, 8 deletions
diff --git a/drivers/acpi/executer/exoparg1.c b/drivers/acpi/executer/exoparg1.c index 252f10acbbc..ab5c0372452 100644 --- a/drivers/acpi/executer/exoparg1.c +++ b/drivers/acpi/executer/exoparg1.c @@ -121,6 +121,7 @@ acpi_status acpi_ex_opcode_0A_0T_1R(struct acpi_walk_state *walk_state) if ((ACPI_FAILURE(status)) || walk_state->result_obj) { acpi_ut_remove_reference(return_desc); + walk_state->result_obj = NULL; } else { /* Save the return value */ diff --git a/drivers/acpi/executer/exoparg2.c b/drivers/acpi/executer/exoparg2.c index 17e652e6537..81c02b12d3f 100644 --- a/drivers/acpi/executer/exoparg2.c +++ b/drivers/acpi/executer/exoparg2.c @@ -241,10 +241,6 @@ acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state) goto cleanup; } - /* Return the remainder */ - - walk_state->result_obj = return_desc1; - cleanup: /* * Since the remainder is not returned indirectly, remove a reference to @@ -259,6 +255,12 @@ acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state) acpi_ut_remove_reference(return_desc1); } + /* Save return object (the remainder) on success */ + + else { + walk_state->result_obj = return_desc1; + } + return_ACPI_STATUS(status); } @@ -490,6 +492,7 @@ acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state) if (ACPI_FAILURE(status)) { acpi_ut_remove_reference(return_desc); + walk_state->result_obj = NULL; } return_ACPI_STATUS(status); @@ -583,8 +586,6 @@ acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state) return_desc->integer.value = ACPI_INTEGER_MAX; } - walk_state->result_obj = return_desc; - cleanup: /* Delete return object on error */ @@ -593,5 +594,11 @@ acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state) acpi_ut_remove_reference(return_desc); } + /* Save return object on success */ + + else { + walk_state->result_obj = return_desc; + } + return_ACPI_STATUS(status); } diff --git a/drivers/acpi/executer/exoparg3.c b/drivers/acpi/executer/exoparg3.c index 7fe67cf82ce..a573f5d260f 100644 --- a/drivers/acpi/executer/exoparg3.c +++ b/drivers/acpi/executer/exoparg3.c @@ -260,6 +260,7 @@ acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state) if (ACPI_FAILURE(status) || walk_state->result_obj) { acpi_ut_remove_reference(return_desc); + walk_state->result_obj = NULL; } /* Set the return object and exit */ diff --git a/drivers/acpi/executer/exoparg6.c b/drivers/acpi/executer/exoparg6.c index bd80a9cb3d6..163b2b3d9ce 100644 --- a/drivers/acpi/executer/exoparg6.c +++ b/drivers/acpi/executer/exoparg6.c @@ -322,8 +322,6 @@ acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state) goto cleanup; } - walk_state->result_obj = return_desc; - cleanup: /* Delete return object on error */ @@ -332,5 +330,11 @@ acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state) acpi_ut_remove_reference(return_desc); } + /* Save return object on success */ + + else { + walk_state->result_obj = return_desc; + } + return_ACPI_STATUS(status); } |