{"id":"CVE-2022-49986","summary":"scsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq\n\nstorvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it\ndoesn't need to make forward progress under memory pressure.  Marking this\nworkqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a\nnon-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following\nwarning:\n\n[   14.506347] ------------[ cut here ]------------\n[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn\n[   14.506360] WARNING: CPU: 0 PID: 8 at \u003c-snip-\u003ekernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130\n[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure #91~18.04.1-Ubuntu\n[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022\n[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun\n[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130\n\t\t\u003c-snip-\u003e\n[   14.506408] Call Trace:\n[   14.506412]  __flush_work+0xf1/0x1c0\n[   14.506414]  __cancel_work_timer+0x12f/0x1b0\n[   14.506417]  ? kernfs_put+0xf0/0x190\n[   14.506418]  cancel_delayed_work_sync+0x13/0x20\n[   14.506420]  disk_block_events+0x78/0x80\n[   14.506421]  del_gendisk+0x3d/0x2f0\n[   14.506423]  sr_remove+0x28/0x70\n[   14.506427]  device_release_driver_internal+0xef/0x1c0\n[   14.506428]  device_release_driver+0x12/0x20\n[   14.506429]  bus_remove_device+0xe1/0x150\n[   14.506431]  device_del+0x167/0x380\n[   14.506432]  __scsi_remove_device+0x11d/0x150\n[   14.506433]  scsi_remove_device+0x26/0x40\n[   14.506434]  storvsc_remove_lun+0x40/0x60\n[   14.506436]  process_one_work+0x209/0x400\n[   14.506437]  worker_thread+0x34/0x400\n[   14.506439]  kthread+0x121/0x140\n[   14.506440]  ? process_one_work+0x400/0x400\n[   14.506441]  ? kthread_park+0x90/0x90\n[   14.506443]  ret_from_fork+0x35/0x40\n[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---","modified":"2026-04-03T13:14:44.154563Z","published":"2025-06-18T11:00:47.985Z","related":["SUSE-SU-2025:02264-1","SUSE-SU-2025:02308-1","SUSE-SU-2025:02320-1","SUSE-SU-2025:02321-1","SUSE-SU-2025:02322-1","SUSE-SU-2025:02334-1","SUSE-SU-2025:02537-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49986.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/46fcb0fc884db78a0384be92cc2a51927e6581b8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/828f57ac75eaccd6607ee4d1468d34e983e32c68"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4c928ace9a123629eeb14ec5d7ee8f73e5ac668"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b692c238ddfa61f00d97c4c1f021425d132ba96f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cd2a50d0a097a42b6de283377da98ff757505120"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d957e7ffb2c72410bcc1a514153a46719255a5da"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49986.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49986"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"436ad941335386c5fc7faa915a8fbdfe8c908084"},{"fixed":"b692c238ddfa61f00d97c4c1f021425d132ba96f"},{"fixed":"b4c928ace9a123629eeb14ec5d7ee8f73e5ac668"},{"fixed":"46fcb0fc884db78a0384be92cc2a51927e6581b8"},{"fixed":"cd2a50d0a097a42b6de283377da98ff757505120"},{"fixed":"828f57ac75eaccd6607ee4d1468d34e983e32c68"},{"fixed":"d957e7ffb2c72410bcc1a514153a46719255a5da"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49986.json"}}],"schema_version":"1.7.5"}