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drm/radeon/kms: add some sanity checks to obj info record parsingi (v2) 

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=35502

agd5f: also add sanity check to connector records.

v2: fix one more case.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
John Lindgren 2011-03-24 23:28:31 +00:00 committed by Dave Airlie
parent 0ce790e7d7
commit 97ea530f6f
1 changed files with 7 additions and 6 deletions
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13
drivers/gpu/drm/radeon/radeon_atombios.c
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@ -675,7 +675,8 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
ATOM_ENCODER_CAP_RECORD *cap_record;
u16 caps = 0;
while (record->ucRecordType > 0 &&
while (record->ucRecordSize > 0 &&
record->ucRecordType > 0 &&
record->ucRecordType <= ATOM_MAX_OBJECT_RECORD_NUMBER) {
switch (record->ucRecordType) {
case ATOM_ENCODER_CAP_RECORD_TYPE:
@ -720,7 +721,8 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
break;
}
while (record->ucRecordType > 0 &&
while (record->ucRecordSize > 0 &&
record->ucRecordType > 0 &&
record->ucRecordType <= ATOM_MAX_OBJECT_RECORD_NUMBER) {
switch (record->ucRecordType) {
case ATOM_I2C_RECORD_TYPE:
@ -782,10 +784,9 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
ATOM_HPD_INT_RECORD *hpd_record;
ATOM_I2C_ID_CONFIG_ACCESS *i2c_config;
while (record->ucRecordType > 0
&& record->
ucRecordType <=
ATOM_MAX_OBJECT_RECORD_NUMBER) {
while (record->ucRecordSize > 0 &&
record->ucRecordType > 0 &&
record->ucRecordType <= ATOM_MAX_OBJECT_RECORD_NUMBER) {
switch (record->ucRecordType) {
case ATOM_I2C_RECORD_TYPE:
i2c_record =