cve-2024-41053
Vulnerability from cvelistv5
Published
2024-07-29 14:32
Modified
2024-12-19 09:10
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Fix ufshcd_abort_one racing issue When ufshcd_abort_one is racing with the completion ISR, the completed tag of the request's mq_hctx pointer will be set to NULL by ISR. Return success when request is completed by ISR because ufshcd_abort_one does not need to do anything. The racing flow is: Thread A ufshcd_err_handler step 1 ... ufshcd_abort_one ufshcd_try_to_abort_task ufshcd_cmd_inflight(true) step 3 ufshcd_mcq_req_to_hwq blk_mq_unique_tag rq->mq_hctx->queue_num step 5 Thread B ufs_mtk_mcq_intr(cq complete ISR) step 2 scsi_done ... __blk_mq_free_request rq->mq_hctx = NULL; step 4 Below is KE back trace. ufshcd_try_to_abort_task: cmd at tag 41 not pending in the device. ufshcd_try_to_abort_task: cmd at tag=41 is cleared. Aborting tag 41 / CDB 0x28 succeeded Unable to handle kernel NULL pointer dereference at virtual address 0000000000000194 pc : [0xffffffddd7a79bf8] blk_mq_unique_tag+0x8/0x14 lr : [0xffffffddd6155b84] ufshcd_mcq_req_to_hwq+0x1c/0x40 [ufs_mediatek_mod_ise] do_mem_abort+0x58/0x118 el1_abort+0x3c/0x5c el1h_64_sync_handler+0x54/0x90 el1h_64_sync+0x68/0x6c blk_mq_unique_tag+0x8/0x14 ufshcd_err_handler+0xae4/0xfa8 [ufs_mediatek_mod_ise] process_one_work+0x208/0x4fc worker_thread+0x228/0x438 kthread+0x104/0x1d4 ret_from_fork+0x10/0x20
Impacted products
Vendor Product Version
Linux Linux Version: ff7699d3620763b0dfe2ff93df4528880bf903a8
Version: 93e6c0e19d5bb12b49534a411c85e21d333731fa
Version: 93e6c0e19d5bb12b49534a411c85e21d333731fa
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   Linux Linux Version: 6.7
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Show details on NVD website


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Return\\nsuccess when request is completed by ISR because ufshcd_abort_one does not\\nneed to do anything.\\n\\nThe racing flow is:\\n\\nThread A\\nufshcd_err_handler\\t\\t\\t\\t\\tstep 1\\n\\t...\\n\\tufshcd_abort_one\\n\\t\\tufshcd_try_to_abort_task\\n\\t\\t\\tufshcd_cmd_inflight(true)\\tstep 3\\n\\t\\tufshcd_mcq_req_to_hwq\\n\\t\\t\\tblk_mq_unique_tag\\n\\t\\t\\t\\trq->mq_hctx->queue_num\\tstep 5\\n\\nThread B\\nufs_mtk_mcq_intr(cq complete ISR)\\t\\t\\tstep 2\\n\\tscsi_done\\n\\t\\t...\\n\\t\\t__blk_mq_free_request\\n\\t\\t\\trq->mq_hctx = NULL;\\t\\tstep 4\\n\\nBelow is KE back trace.\\n  ufshcd_try_to_abort_task: cmd at tag 41 not pending in the device.\\n  ufshcd_try_to_abort_task: cmd at tag=41 is cleared.\\n  Aborting tag 41 / CDB 0x28 succeeded\\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000194\\n  pc : [0xffffffddd7a79bf8] blk_mq_unique_tag+0x8/0x14\\n  lr : [0xffffffddd6155b84] ufshcd_mcq_req_to_hwq+0x1c/0x40 [ufs_mediatek_mod_ise]\\n   do_mem_abort+0x58/0x118\\n   el1_abort+0x3c/0x5c\\n   el1h_64_sync_handler+0x54/0x90\\n   el1h_64_sync+0x68/0x6c\\n   blk_mq_unique_tag+0x8/0x14\\n   ufshcd_err_handler+0xae4/0xfa8 [ufs_mediatek_mod_ise]\\n   process_one_work+0x208/0x4fc\\n   worker_thread+0x228/0x438\\n   kthread+0x104/0x1d4\\n   ret_from_fork+0x10/0x20\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvió la siguiente vulnerabilidad: scsi: ufs: core: solucione el problema de ejecución de ufshcd_abort_one Cuando ufshcd_abort_one se ejecuta con el ISR de finalización, ISR establecerá la etiqueta completada del puntero mq_hctx de la solicitud en NULL. Devuelve el éxito cuando ISR completa la solicitud porque ufshcd_abort_one no necesita hacer nada. El flujo de ejecucuones es: Hilo A ufshcd_err_handler paso 1 ... ufshcd_abort_one ufshcd_try_to_abort_task ufshcd_cmd_inflight(true) paso 3 ufshcd_mcq_req_to_hwq blk_mq_unique_tag rq->mq_hctx->queue_num paso 5 Hilo B (cq completar ISR) paso 2 scsi_done... __blk_mq_free_request rq-> mq_hctx = NULO; paso 4 A continuación se muestra el seguimiento de KE. ufshcd_try_to_abort_task: cmd en la etiqueta 41 no está pendiente en el dispositivo. ufshcd_try_to_abort_task: cmd en la etiqueta = 41 se borra. 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}


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