CVE-2024-56552 - Vulnerability Details

Link	Providers
https://git.kernel.org/stable/c/5ddcb50b700221fa7d7be2adcb3d7d7afe8633dd
https://git.kernel.org/stable/c/87651f31ae4e6e6e7e6c7270b9b469405e747407

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc_submit: fix race around suspend_pending Currently in some testcases we can trigger: xe 0000:03:00.0: [drm] Assertion `exec_queue_destroyed(q)` failed! .... WARNING: CPU: 18 PID: 2640 at drivers/gpu/drm/xe/xe_guc_submit.c:1826 xe_guc_sched_done_handler+0xa54/0xef0 [xe] xe 0000:03:00.0: [drm] ERROR GT1: DEREGISTER_DONE: Unexpected engine state 0x00a1, guc_id=57 Looking at a snippet of corresponding ftrace for this GuC id we can see: 162.673311: xe_sched_msg_add: dev=0000:03:00.0, gt=1 guc_id=57, opcode=3 162.673317: xe_sched_msg_recv: dev=0000:03:00.0, gt=1 guc_id=57, opcode=3 162.673319: xe_exec_queue_scheduling_disable: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0x29, flags=0x0 162.674089: xe_exec_queue_kill: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0x29, flags=0x0 162.674108: xe_exec_queue_close: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa9, flags=0x0 162.674488: xe_exec_queue_scheduling_done: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa9, flags=0x0 162.678452: xe_exec_queue_deregister: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa1, flags=0x0 It looks like we try to suspend the queue (opcode=3), setting suspend_pending and triggering a disable_scheduling. The user then closes the queue. However the close will also forcefully signal the suspend fence after killing the queue, later when the G2H response for disable_scheduling comes back we have now cleared suspend_pending when signalling the suspend fence, so the disable_scheduling now incorrectly tries to also deregister the queue. This leads to warnings since the queue has yet to even be marked for destruction. We also seem to trigger errors later with trying to double unregister the same queue. To fix this tweak the ordering when handling the response to ensure we don't race with a disable_scheduling that didn't actually intend to perform an unregister. The destruction path should now also correctly wait for any pending_disable before marking as destroyed. (cherry picked from commit f161809b362f027b6d72bd998e47f8f0bad60a2e)
Title		drm/xe/guc_submit: fix race around suspend_pending
References		https://git.kernel.org/stable/c/5ddcb50b700221fa7d7be2adcb3d7d7afe8633dd https://git.kernel.org/stable/c/87651f31ae4e6e6e7e6c7270b9b469405e747407

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-56552", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:05.990Z", "datePublished": "2024-12-27T14:22:54.140Z", "dateUpdated": "2024-12-27T14:22:54.140Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-27T14:22:54.140Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc_submit: fix race around suspend_pending\n\nCurrently in some testcases we can trigger:\n\nxe 0000:03:00.0: [drm] Assertion `exec_queue_destroyed(q)` failed!\n....\nWARNING: CPU: 18 PID: 2640 at drivers/gpu/drm/xe/xe_guc_submit.c:1826 xe_guc_sched_done_handler+0xa54/0xef0 [xe]\nxe 0000:03:00.0: [drm] *ERROR* GT1: DEREGISTER_DONE: Unexpected engine state 0x00a1, guc_id=57\n\nLooking at a snippet of corresponding ftrace for this GuC id we can see:\n\n162.673311: xe_sched_msg_add: dev=0000:03:00.0, gt=1 guc_id=57, opcode=3\n162.673317: xe_sched_msg_recv: dev=0000:03:00.0, gt=1 guc_id=57, opcode=3\n162.673319: xe_exec_queue_scheduling_disable: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0x29, flags=0x0\n162.674089: xe_exec_queue_kill: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0x29, flags=0x0\n162.674108: xe_exec_queue_close: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa9, flags=0x0\n162.674488: xe_exec_queue_scheduling_done: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa9, flags=0x0\n162.678452: xe_exec_queue_deregister: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa1, flags=0x0\n\nIt looks like we try to suspend the queue (opcode=3), setting\nsuspend_pending and triggering a disable_scheduling. The user then\ncloses the queue. However the close will also forcefully signal the\nsuspend fence after killing the queue, later when the G2H response for\ndisable_scheduling comes back we have now cleared suspend_pending when\nsignalling the suspend fence, so the disable_scheduling now incorrectly\ntries to also deregister the queue. This leads to warnings since the queue\nhas yet to even be marked for destruction. We also seem to trigger\nerrors later with trying to double unregister the same queue.\n\nTo fix this tweak the ordering when handling the response to ensure we\ndon't race with a disable_scheduling that didn't actually intend to\nperform an unregister. The destruction path should now also correctly\nwait for any pending_disable before marking as destroyed.\n\n(cherry picked from commit f161809b362f027b6d72bd998e47f8f0bad60a2e)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_guc_submit.c"], "versions": [{"version": "dd08ebf6c3525a7ea2186e636df064ea47281987", "lessThan": "5ddcb50b700221fa7d7be2adcb3d7d7afe8633dd", "status": "affected", "versionType": "git"}, {"version": "dd08ebf6c3525a7ea2186e636df064ea47281987", "lessThan": "87651f31ae4e6e6e7e6c7270b9b469405e747407", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_guc_submit.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.4", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/5ddcb50b700221fa7d7be2adcb3d7d7afe8633dd"}, {"url": "https://git.kernel.org/stable/c/87651f31ae4e6e6e7e6c7270b9b469405e747407"}], "title": "drm/xe/guc_submit: fix race around suspend_pending", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc_submit: fix race around suspend_pending\n\nCurrently in some testcases we can trigger:\n\nxe 0000:03:00.0: [drm] Assertion `exec_queue_destroyed(q)` failed!\n....\nWARNING: CPU: 18 PID: 2640 at drivers/gpu/drm/xe/xe_guc_submit.c:1826 xe_guc_sched_done_handler+0xa54/0xef0 [xe]\nxe 0000:03:00.0: [drm] *ERROR* GT1: DEREGISTER_DONE: Unexpected engine state 0x00a1, guc_id=57\n\nLooking at a snippet of corresponding ftrace for this GuC id we can see:\n\n162.673311: xe_sched_msg_add: dev=0000:03:00.0, gt=1 guc_id=57, opcode=3\n162.673317: xe_sched_msg_recv: dev=0000:03:00.0, gt=1 guc_id=57, opcode=3\n162.673319: xe_exec_queue_scheduling_disable: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0x29, flags=0x0\n162.674089: xe_exec_queue_kill: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0x29, flags=0x0\n162.674108: xe_exec_queue_close: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa9, flags=0x0\n162.674488: xe_exec_queue_scheduling_done: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa9, flags=0x0\n162.678452: xe_exec_queue_deregister: dev=0000:03:00.0, 1:0x2, gt=1, width=1, guc_id=57, guc_state=0xa1, flags=0x0\n\nIt looks like we try to suspend the queue (opcode=3), setting\nsuspend_pending and triggering a disable_scheduling. The user then\ncloses the queue. However the close will also forcefully signal the\nsuspend fence after killing the queue, later when the G2H response for\ndisable_scheduling comes back we have now cleared suspend_pending when\nsignalling the suspend fence, so the disable_scheduling now incorrectly\ntries to also deregister the queue. This leads to warnings since the queue\nhas yet to even be marked for destruction. We also seem to trigger\nerrors later with trying to double unregister the same queue.\n\nTo fix this tweak the ordering when handling the response to ensure we\ndon't race with a disable_scheduling that didn't actually intend to\nperform an unregister. The destruction path should now also correctly\nwait for any pending_disable before marking as destroyed.\n\n(cherry picked from commit f161809b362f027b6d72bd998e47f8f0bad60a2e)"}], "id": "CVE-2024-56552", "lastModified": "2024-12-27T15:15:13.970", "metrics": {}, "published": "2024-12-27T15:15:13.970", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5ddcb50b700221fa7d7be2adcb3d7d7afe8633dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/87651f31ae4e6e6e7e6c7270b9b469405e747407"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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