{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2022-49003", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix SRCU protection of nvme_ns_head list\n\nWalking the nvme_ns_head siblings list is protected by the head's srcu\nin nvme_ns_head_submit_bio() but not nvme_mpath_revalidate_paths().\nRemoving namespaces from the list also fails to synchronize the srcu.\nConcurrent scan work can therefore cause use-after-frees.\n\nHold the head's srcu lock in nvme_mpath_revalidate_paths() and\nsynchronize with the srcu, not the global RCU, in nvme_ns_remove().\n\nObserved the following panic when making NVMe/RDMA connections\nwith native multipath on the Rocky Linux 8.6 kernel\n(it seems the upstream kernel has the same race condition).\nDisassembly shows the faulting instruction is cmp 0x50(%rdx),%rcx;\ncomputing capacity != get_capacity(ns->disk).\nAddress 0x50 is dereferenced because ns->disk is NULL.\nThe NULL disk appears to be the result of concurrent scan work\nfreeing the namespace (note the log line in the middle of the panic).\n\n[37314.206036] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050\n[37314.206036] nvme0n3: detected capacity change from 0 to 11811160064\n[37314.299753] PGD 0 P4D 0\n[37314.299756] Oops: 0000 [#1] SMP PTI\n[37314.299759] CPU: 29 PID: 322046 Comm: kworker/u98:3 Kdump: loaded Tainted: G W X --------- - - 4.18.0-372.32.1.el8test86.x86_64 #1\n[37314.299762] Hardware name: Dell Inc. PowerEdge R720/0JP31P, BIOS 2.7.0 05/23/2018\n[37314.299763] Workqueue: nvme-wq nvme_scan_work [nvme_core]\n[37314.299783] RIP: 0010:nvme_mpath_revalidate_paths+0x26/0xb0 [nvme_core]\n[37314.299790] Code: 1f 44 00 00 66 66 66 66 90 55 53 48 8b 5f 50 48 8b 83 c8 c9 00 00 48 8b 13 48 8b 48 50 48 39 d3 74 20 48 8d 42 d0 48 8b 50 20 <48> 3b 4a 50 74 05 f0 80 60 70 ef 48 8b 50 30 48 8d 42 d0 48 39 d3\n[37315.058803] RSP: 0018:ffffabe28f913d10 EFLAGS: 00010202\n[37315.121316] RAX: ffff927a077da800 RBX: ffff92991dd70000 RCX: 0000000001600000\n[37315.206704] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff92991b719800\n[37315.292106] RBP: ffff929a6b70c000 R08: 000000010234cd4a R09: c0000000ffff7fff\n[37315.377501] R10: 0000000000000001 R11: ffffabe28f913a30 R12: 0000000000000000\n[37315.462889] R13: ffff92992716600c R14: ffff929964e6e030 R15: ffff92991dd70000\n[37315.548286] FS: 0000000000000000(0000) GS:ffff92b87fb80000(0000) knlGS:0000000000000000\n[37315.645111] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[37315.713871] CR2: 0000000000000050 CR3: 0000002208810006 CR4: 00000000000606e0\n[37315.799267] Call Trace:\n[37315.828515] nvme_update_ns_info+0x1ac/0x250 [nvme_core]\n[37315.892075] nvme_validate_or_alloc_ns+0x2ff/0xa00 [nvme_core]\n[37315.961871] ? __blk_mq_free_request+0x6b/0x90\n[37316.015021] nvme_scan_work+0x151/0x240 [nvme_core]\n[37316.073371] process_one_work+0x1a7/0x360\n[37316.121318] ? create_worker+0x1a0/0x1a0\n[37316.168227] worker_thread+0x30/0x390\n[37316.212024] ? create_worker+0x1a0/0x1a0\n[37316.258939] kthread+0x10a/0x120\n[37316.297557] ? set_kthread_struct+0x50/0x50\n[37316.347590] ret_from_fork+0x35/0x40\n[37316.390360] Modules linked in: nvme_rdma nvme_tcp(X) nvme_fabrics nvme_core netconsole iscsi_tcp libiscsi_tcp dm_queue_length dm_service_time nf_conntrack_netlink br_netfilter bridge stp llc overlay nft_chain_nat ipt_MASQUERADE nf_nat xt_addrtype xt_CT nft_counter xt_state xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_comment xt_multiport nft_compat nf_tables libcrc32c nfnetlink dm_multipath tg3 rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod target_core_mod ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm intel_rapl_msr iTCO_wdt iTCO_vendor_support dcdbas intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ipmi_ssif kvm irqbypass crct10dif_pclmul crc32_pclmul mlx5_ib ghash_clmulni_intel ib_uverbs rapl intel_cstate intel_uncore ib_core ipmi_si joydev mei_me pcspkr ipmi_devintf mei lpc_ich wmi ipmi_msghandler acpi_power_meter ex\n---truncated---" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "e7d65803e2bb", "version_value": "787d81d4eb15" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.82", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.0.12", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/787d81d4eb150e443e5d1276c6e8f03cfecc2302", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/787d81d4eb150e443e5d1276c6e8f03cfecc2302" }, { "url": "https://git.kernel.org/stable/c/5b566d09ab1b975566a53f9c5466ee260d087582", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/5b566d09ab1b975566a53f9c5466ee260d087582" }, { "url": "https://git.kernel.org/stable/c/899d2a05dc14733cfba6224083c6b0dd5a738590", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/899d2a05dc14733cfba6224083c6b0dd5a738590" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }