In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nvme: remove stale namespaces by NSID range during scan<\/p>\n
nvme_scan_ns_list() drops the stale namespaces in each gap in the
\nreported NSID list one NSID at a time. Every iteration calls
\nnvme_find_get_ns() to look the namespace up and removes it if it is
\npresent. The loop runs once per NSID in the gap rather than once per
\nnamespace actually present.<\/p>\n
NSIDs are 32-bit, so a target with a sparse NSID space can make a
\nsingle gap spin the loop billions of times with nothing to remove.<\/p>\n
watchdog: BUG: soft lockup – CPU#4 stuck for 26s!
\n Workqueue: nvme-wq nvme_scan_work [nvme_core]
\n RIP: 0010:__srcu_read_unlock+0xb\/0x20
\n Call Trace:
\n nvme_find_get_ns+0x7d\/0xb0 [nvme_core]
\n nvme_scan_ns_list+0xe8\/0x280 [nvme_core]
\n nvme_scan_work+0x18a\/0x280 [nvme_core]
\n process_one_work+0x197\/0x380
\n worker_thread+0x2fe\/0x410
\n kthread+0xe0\/0x100<\/p>\n
Rename nvme_remove_invalid_namespaces() to nvme_remove_nsid_range()
\nand give it an open (start, end) NSID range. ctrl->namespaces is
\nsorted by NSID, so the whole gap is dropped in a single walk that
\nstops once end is reached. This bounds the work by the namespaces
\nthat are present instead of by the size of the gap.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nvme: remove stale namespaces by NSID range during scan<\/p>\n
nvme_scan_ns_list() drops the stale namespaces in each gap in the
\nreported<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29211","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29211","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=29211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}