The commit is pushed to "branch-rh7-3.10.0-229.7.2.vz7.9.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git after rh7-3.10.0-229.7.2.vz7.9.18 ------> commit 517d6f84f178029d2373bae81d72982ebbb319f9 Author: James Bottomley <james.bottom...@hansenpartnership.com> Date: Mon Dec 28 17:06:50 2015 +0400
ms/ses: fix additional element traversal bug KASAN found that our additional element processing scripts drop off the end of the VPD page into unallocated space. The reason is that not every element has additional information but our traversal routines think they do, leading to them expecting far more additional information than is present. Fix this by adding a gate to the traversal routine so that it only processes elements that are expected to have additional information (list is in SES-2 section 6.1.13.1: Additional Element Status diagnostic page overview) Reported-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com> Tested-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com> Cc: sta...@vger.kernel.org Signed-off-by: James Bottomley <james.bottom...@hansenpartnership.com> Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com> Reviewed-by: Hannes Reinecke <h...@suse.com> https://jira.sw.ru/browse/PSBM-40330 Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com> --- drivers/scsi/ses.c | 10 +++++++++- include/linux/enclosure.h | 4 ++++ 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c index 80bfece..dab7f6b 100644 --- a/drivers/scsi/ses.c +++ b/drivers/scsi/ses.c @@ -437,7 +437,15 @@ static void ses_enclosure_data_process(struct enclosure_device *edev, if (desc_ptr) desc_ptr += len; - if (addl_desc_ptr) + if (addl_desc_ptr && + /* only find additional descriptions for specific devices */ + (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || + type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE || + type_ptr[0] == ENCLOSURE_COMPONENT_SAS_EXPANDER || + /* these elements are optional */ + type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_TARGET_PORT || + type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT || + type_ptr[0] == ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS)) addl_desc_ptr += addl_desc_ptr[1] + 2; } diff --git a/include/linux/enclosure.h b/include/linux/enclosure.h index 9a33c5f..f6c229e 100644 --- a/include/linux/enclosure.h +++ b/include/linux/enclosure.h @@ -29,7 +29,11 @@ /* A few generic types ... taken from ses-2 */ enum enclosure_component_type { ENCLOSURE_COMPONENT_DEVICE = 0x01, + ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS = 0x07, + ENCLOSURE_COMPONENT_SCSI_TARGET_PORT = 0x14, + ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT = 0x15, ENCLOSURE_COMPONENT_ARRAY_DEVICE = 0x17, + ENCLOSURE_COMPONENT_SAS_EXPANDER = 0x18, }; /* ses-2 common element status */ _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel