From 97ea530f6fac1f9632b0c4792a2a56411454adbe Mon Sep 17 00:00:00 2001 From: John Lindgren Date: Thu, 24 Mar 2011 23:28:31 +0000 Subject: 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 Cc: stable@kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_atombios.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 02d5c415f499..99768d9d91da 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -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 = -- cgit v1.2.3