* Coverity: drm_dp_mst_process_up_req(): Null pointer dereferences
@ 2019-11-04 17:42 coverity-bot
0 siblings, 0 replies; only message in thread
From: coverity-bot @ 2019-11-04 17:42 UTC (permalink / raw)
To: Lyude Paul; +Cc: Sean Paul, Gustavo A. R. Silva, linux-next
Hello!
This is an experimental automated report about issues detected by Coverity
from a scan of next-20191031 as part of the linux-next weekly scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan
You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by recent commits:
9408cc94eb04 ("drm/dp_mst: Handle UP requests asynchronously")
Coverity reported the following:
*** CID 1487392: Null pointer dereferences (FORWARD_NULL)
/drivers/gpu/drm/drm_dp_mst_topology.c: 3710 in drm_dp_mst_process_up_req()
3704
3705 if (msg->req_type == DP_CONNECTION_STATUS_NOTIFY)
3706 guid = msg->u.conn_stat.guid;
3707 else if (msg->req_type == DP_RESOURCE_STATUS_NOTIFY)
3708 guid = msg->u.resource_stat.guid;
3709
vvv CID 1487392: Null pointer dereferences (FORWARD_NULL)
vvv Passing null pointer "guid" to "drm_dp_get_mst_branch_device_by_guid", which dereferences it.
3710 mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid);
3711 } else {
3712 mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad);
3713 }
3714
3715 if (!mstb) {
If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1487392 ("Null pointer dereferences")
Fixes: 9408cc94eb04 ("drm/dp_mst: Handle UP requests asynchronously")
Thanks for your attention!
--
Coverity-bot
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2019-11-04 17:42 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-04 17:42 Coverity: drm_dp_mst_process_up_req(): Null pointer dereferences coverity-bot
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).