{"id":"CVE-2022-49930","summary":"RDMA/hns: Fix NULL pointer problem in free_mr_init()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/hns: Fix NULL pointer problem in free_mr_init()\n\nLock grab occurs in a concurrent scenario, resulting in stepping on a NULL\npointer.  It should be init mutex_init() first before use the lock.\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n  Call trace:\n   __mutex_lock.constprop.0+0xd0/0x5c0\n   __mutex_lock_slowpath+0x1c/0x2c\n   mutex_lock+0x44/0x50\n   free_mr_send_cmd_to_hw+0x7c/0x1c0 [hns_roce_hw_v2]\n   hns_roce_v2_dereg_mr+0x30/0x40 [hns_roce_hw_v2]\n   hns_roce_dereg_mr+0x4c/0x130 [hns_roce_hw_v2]\n   ib_dereg_mr_user+0x54/0x124\n   uverbs_free_mr+0x24/0x30\n   destroy_hw_idr_uobject+0x38/0x74\n   uverbs_destroy_uobject+0x48/0x1c4\n   uobj_destroy+0x74/0xcc\n   ib_uverbs_cmd_verbs+0x368/0xbb0\n   ib_uverbs_ioctl+0xec/0x1a4\n   __arm64_sys_ioctl+0xb4/0x100\n   invoke_syscall+0x50/0x120\n   el0_svc_common.constprop.0+0x58/0x190\n   do_el0_svc+0x30/0x90\n   el0_svc+0x2c/0xb4\n   el0t_64_sync_handler+0x1a4/0x1b0\n   el0t_64_sync+0x19c/0x1a0","modified":"2026-04-02T08:28:04.024302Z","published":"2025-05-01T14:11:07.408Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49930.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0e23e85d86b78e734dd6654f1b69fbaeb5534c81"},{"type":"WEB","url":"https://git.kernel.org/stable/c/12bcaf87d8b66d8cd812479c8a6349dcb245375c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49930.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49930"},{"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":"70f92521584f1d1e8268311ee84413307b0fdea8"},{"fixed":"0e23e85d86b78e734dd6654f1b69fbaeb5534c81"},{"fixed":"12bcaf87d8b66d8cd812479c8a6349dcb245375c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49930.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}