In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: ufs: core: Keep internal commands dispatchable during error handling<\/p>\n
Commit 08b12cda6c44 (“scsi: ufs: core: Switch to scsi_get_internal_cmd()”)
\nswitched UFS internal commands to allocate requests on
\nhba->host->pseudo_sdev->request_queue, which shares the host tagset with
\nregular LUNs.<\/p>\n
During error recovery, ufshcd_err_handling_prepare() calls
\nblk_mq_quiesce_tagset(&hba->host->tag_set), marking all queues in the
\ntagset as quiesced, including pseudo_sdev->request_queue. When
\nufshcd_verify_dev_init() subsequently issues internal commands (e.g. NOP
\nOUT UPIU) via blk_execute_rq(), blk_mq_run_hw_queue() skips running the
\nquiesced queue, resulting in an unrecoverable circular wait deadlock.<\/p>\n
Keep quiescing the tagset and unquiesce the pseudo SCSI device on top of
\nthat, so internal commands stay dispatchable while the logical units remain
\nquiesced. Re-quiesce the pseudo device before unquiescing the tagset so
\nthat quiesce_depth stays balanced.<\/p>\n
Clock scaling and ufshcd_pause_command_processing() are unaffected: they
\nkeep quiescing the whole tagset, internal commands included.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: ufs: core: Keep internal commands dispatchable during error handling<\/p>\n
Commit 08b12cda6c44 (“scsi: ufs: core: Switch to scsi_g<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-40950","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/40950","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}