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CVE-2021-46931 (GCVE-0-2021-46931)

Vulnerability from cvelistv5 – Published: 2024-02-27 09:43 – Updated: 2026-05-11 13:44
VLAI
Title
net/mlx5e: Wrap the tx reporter dump callback to extract the sq
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Wrap the tx reporter dump callback to extract the sq Function mlx5e_tx_reporter_dump_sq() casts its void * argument to struct mlx5e_txqsq *, but in TX-timeout-recovery flow the argument is actually of type struct mlx5e_tx_timeout_ctx *. mlx5_core 0000:08:00.1 enp8s0f1: TX timeout detected mlx5_core 0000:08:00.1 enp8s0f1: TX timeout on queue: 1, SQ: 0x11ec, CQ: 0x146d, SQ Cons: 0x0 SQ Prod: 0x1, usecs since last trans: 21565000 BUG: stack guard page was hit at 0000000093f1a2de (stack is 00000000b66ea0dc..000000004d932dae) kernel stack overflow (page fault): 0000 [#1] SMP NOPTI CPU: 5 PID: 95 Comm: kworker/u20:1 Tainted: G W OE 5.13.0_mlnx #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Workqueue: mlx5e mlx5e_tx_timeout_work [mlx5_core] RIP: 0010:mlx5e_tx_reporter_dump_sq+0xd3/0x180 [mlx5_core] Call Trace: mlx5e_tx_reporter_dump+0x43/0x1c0 [mlx5_core] devlink_health_do_dump.part.91+0x71/0xd0 devlink_health_report+0x157/0x1b0 mlx5e_reporter_tx_timeout+0xb9/0xf0 [mlx5_core] ? mlx5e_tx_reporter_err_cqe_recover+0x1d0/0x1d0 [mlx5_core] ? mlx5e_health_queue_dump+0xd0/0xd0 [mlx5_core] ? update_load_avg+0x19b/0x550 ? set_next_entity+0x72/0x80 ? pick_next_task_fair+0x227/0x340 ? finish_task_switch+0xa2/0x280 mlx5e_tx_timeout_work+0x83/0xb0 [mlx5_core] process_one_work+0x1de/0x3a0 worker_thread+0x2d/0x3c0 ? process_one_work+0x3a0/0x3a0 kthread+0x115/0x130 ? kthread_park+0x90/0x90 ret_from_fork+0x1f/0x30 --[ end trace 51ccabea504edaff ]--- RIP: 0010:mlx5e_tx_reporter_dump_sq+0xd3/0x180 PKRU: 55555554 Kernel panic - not syncing: Fatal exception Kernel Offset: disabled end Kernel panic - not syncing: Fatal exception To fix this bug add a wrapper for mlx5e_tx_reporter_dump_sq() which extracts the sq from struct mlx5e_tx_timeout_ctx and set it as the TX-timeout-recovery flow dump callback.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-26 20:41 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5f29458b77d51c104554575b73184c243930aa87 , < 73665165b64a8f3c5b3534009a69be55bb744f05 (git)
Affected: 5f29458b77d51c104554575b73184c243930aa87 , < 07f13d58a8ecc3baf9a488588fb38c5cb0db484f (git)
Affected: 5f29458b77d51c104554575b73184c243930aa87 , < 918fc3855a6507a200e9cf22c20be852c0982687 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.90 , ≤ 5.10.* (semver)
Unaffected: 5.15.13 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Wrap the tx reporter dump callback to extract the sq\n\nFunction mlx5e_tx_reporter_dump_sq() casts its void * argument to struct\nmlx5e_txqsq *, but in TX-timeout-recovery flow the argument is actually\nof type struct mlx5e_tx_timeout_ctx *.\n\n mlx5_core 0000:08:00.1 enp8s0f1: TX timeout detected\n mlx5_core 0000:08:00.1 enp8s0f1: TX timeout on queue: 1, SQ: 0x11ec, CQ: 0x146d, SQ Cons: 0x0 SQ Prod: 0x1, usecs since last trans: 21565000\n BUG: stack guard page was hit at 0000000093f1a2de (stack is 00000000b66ea0dc..000000004d932dae)\n kernel stack overflow (page fault): 0000 [#1] SMP NOPTI\n CPU: 5 PID: 95 Comm: kworker/u20:1 Tainted: G W OE 5.13.0_mlnx #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n Workqueue: mlx5e mlx5e_tx_timeout_work [mlx5_core]\n RIP: 0010:mlx5e_tx_reporter_dump_sq+0xd3/0x180\n [mlx5_core]\n Call Trace:\n mlx5e_tx_reporter_dump+0x43/0x1c0 [mlx5_core]\n devlink_health_do_dump.part.91+0x71/0xd0\n devlink_health_report+0x157/0x1b0\n mlx5e_reporter_tx_timeout+0xb9/0xf0 [mlx5_core]\n ? mlx5e_tx_reporter_err_cqe_recover+0x1d0/0x1d0\n [mlx5_core]\n ? mlx5e_health_queue_dump+0xd0/0xd0 [mlx5_core]\n ? update_load_avg+0x19b/0x550\n ? set_next_entity+0x72/0x80\n ? pick_next_task_fair+0x227/0x340\n ? finish_task_switch+0xa2/0x280\n   mlx5e_tx_timeout_work+0x83/0xb0 [mlx5_core]\n   process_one_work+0x1de/0x3a0\n   worker_thread+0x2d/0x3c0\n ? process_one_work+0x3a0/0x3a0\n   kthread+0x115/0x130\n ? kthread_park+0x90/0x90\n   ret_from_fork+0x1f/0x30\n --[ end trace 51ccabea504edaff ]---\n RIP: 0010:mlx5e_tx_reporter_dump_sq+0xd3/0x180\n PKRU: 55555554\n Kernel panic - not syncing: Fatal exception\n Kernel Offset: disabled\n end Kernel panic - not syncing: Fatal exception\n\nTo fix this bug add a wrapper for mlx5e_tx_reporter_dump_sq() which\nextracts the sq from struct mlx5e_tx_timeout_ctx and set it as the\nTX-timeout-recovery flow dump callback."
          },
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/mlx5e: envuelve la devoluci\u00f3n de llamada del volcado de tx reporter para extraer el sq. La funci\u00f3n mlx5e_tx_reporter_dump_sq() lanza su argumento void * a la estructura mlx5e_txqsq *, pero en el flujo TX-timeout-recovery el argumento en realidad es de tipo struct mlx5e_tx_timeout_ctx *. mlx5_core 0000: 08: 00.1 enp8s0f1: tx timeout detectado mlx5_core 0000: 08: 00.1 enp8s0f1: tx timeout en cola: 1, sq: 0x11ec, cq: 0x146d, sq consecuencia: 0x0 sq prod: 0x1, usecs desde el \u00faltimo trans: 21565000 : la p\u00e1gina de protecci\u00f3n de pila fue visitada en 0000000093f1a2de (la pila es 00000000b66ea0dc..000000004d932dae) Desbordamiento de pila del kernel (fallo de p\u00e1gina): 0000 [#1] SMP NOPTI CPU: 5 PID: 95 Comm: kworker/u20:1 Contaminado: GW OE 5.13. 0_mlnx #1 Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 Cola de trabajo: mlx5e mlx5e_tx_timeout_work [mlx5_core] RIP: 0010:mlx5e_tx_reporter_ volcado_sq +0xd3/0x180 [mlx5_core] Seguimiento de llamadas: mlx5e_tx_reporter_dump+0x43/0x1c0 [mlx5_core] devlink_health_do_dump.part.91+0x71/0xd0 devlink_health_report+0x157/0x1b0 mlx5e_reporter_tx_timeout+0xb9/0xf0 [ml x5_core] ? mlx5e_tx_reporter_err_cqe_recover+0x1d0/0x1d0 [mlx5_core] ? mlx5e_health_queue_dump+0xd0/0xd0 [mlx5_core] ? update_load_avg+0x19b/0x550? set_next_entity+0x72/0x80? pick_next_task_fair+0x227/0x340? Finish_task_switch+0xa2/0x280 mlx5e_tx_timeout_work+0x83/0xb0 [mlx5_core] Process_one_work+0x1de/0x3a0 trabajador_thread+0x2d/0x3c0? proceso_one_work+0x3a0/0x3a0 kthread+0x115/0x130 ? kthread_park+0x90/0x90 ret_from_fork+0x1f/0x30 --[ end trace 51ccabea504edaff ]--- RIP: 0010:mlx5e_tx_reporter_dump_sq+0xd3/0x180 PKRU: 55555554 P\u00e1nico del kernel - no sincronizado: excepci\u00f3n fatal Compensaci\u00f3n del kernel: final deshabilitado P\u00e1nico del kernel - no sincronizar : Excepci\u00f3n fatal Para corregir este error, agregue un contenedor para mlx5e_tx_reporter_dump_sq() que extrae el sq de la estructura mlx5e_tx_timeout_ctx y lo configura como devoluci\u00f3n de llamada de volcado de flujo de recuperaci\u00f3n de tiempo de espera de TX."
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        ],
        "id": "CVE-2021-46931",
        "lastModified": "2026-06-17T04:15:53.467",
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                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.