{"id":"CVE-2024-50296","summary":"net: hns3: fix kernel crash when uninstalling driver","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: fix kernel crash when uninstalling driver\n\nWhen the driver is uninstalled and the VF is disabled concurrently, a\nkernel crash occurs. The reason is that the two actions call function\npci_disable_sriov(). The num_VFs is checked to determine whether to\nrelease the corresponding resources. During the second calling, num_VFs\nis not 0 and the resource release function is called. However, the\ncorresponding resource has been released during the first invoking.\nTherefore, the problem occurs:\n\n[15277.839633][T50670] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020\n...\n[15278.131557][T50670] Call trace:\n[15278.134686][T50670]  klist_put+0x28/0x12c\n[15278.138682][T50670]  klist_del+0x14/0x20\n[15278.142592][T50670]  device_del+0xbc/0x3c0\n[15278.146676][T50670]  pci_remove_bus_device+0x84/0x120\n[15278.151714][T50670]  pci_stop_and_remove_bus_device+0x6c/0x80\n[15278.157447][T50670]  pci_iov_remove_virtfn+0xb4/0x12c\n[15278.162485][T50670]  sriov_disable+0x50/0x11c\n[15278.166829][T50670]  pci_disable_sriov+0x24/0x30\n[15278.171433][T50670]  hnae3_unregister_ae_algo_prepare+0x60/0x90 [hnae3]\n[15278.178039][T50670]  hclge_exit+0x28/0xd0 [hclge]\n[15278.182730][T50670]  __se_sys_delete_module.isra.0+0x164/0x230\n[15278.188550][T50670]  __arm64_sys_delete_module+0x1c/0x30\n[15278.193848][T50670]  invoke_syscall+0x50/0x11c\n[15278.198278][T50670]  el0_svc_common.constprop.0+0x158/0x164\n[15278.203837][T50670]  do_el0_svc+0x34/0xcc\n[15278.207834][T50670]  el0_svc+0x20/0x30\n\nFor details, see the following figure.\n\n     rmmod hclge              disable VFs\n----------------------------------------------------\nhclge_exit()            sriov_numvfs_store()\n  ...                     device_lock()\n  pci_disable_sriov()     hns3_pci_sriov_configure()\n                            pci_disable_sriov()\n                              sriov_disable()\n    sriov_disable()             if !num_VFs :\n      if !num_VFs :               return;\n        return;                 sriov_del_vfs()\n      sriov_del_vfs()             ...\n        ...                       klist_put()\n        klist_put()               ...\n        ...                     num_VFs = 0;\n      num_VFs = 0;        device_unlock();\n\nIn this patch, when driver is removing, we get the device_lock()\nto protect num_VFs, just like sriov_numvfs_store().","modified":"2026-10-08T02:50:10.615231242Z","published":"2024-11-19T01:30:43.318Z","related":["SUSE-SU-2024:4314-1","SUSE-SU-2024:4316-1","SUSE-SU-2024:4318-1","SUSE-SU-2024:4367-1","SUSE-SU-2025:0035-1","SUSE-SU-2025:0201-1","SUSE-SU-2025:0201-2","SUSE-SU-2025:0229-1","SUSE-SU-2025:0289-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1","USN-7276-1","USN-7277-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50296.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/590a4b2d4e0b73586e88bce9b8135b593355ec09"},{"type":"WEB","url":"https://git.kernel.org/stable/c/719edd9f3372ce7fb3b157647c6658672946874b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76b155e14d9b182ce83d32ada2d0d7219ea8c8dd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ae4e56de7dbd0999578246a536cf52a63f4056d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a0df055775f30850c0da8f7dab40d67c0fd63908"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b5c94e4d947d15d521e935ff10c5a22a7883dea5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/df3dff8ab6d79edc942464999d06fbaedf8cdd18"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e36482b222e00cc7aeeea772fc0cf2943590bc4d"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50296.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50296"},{"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":"b06ad258e01389ca3ff13bc180f3fcd6a608f1cd"},{"fixed":"a0df055775f30850c0da8f7dab40d67c0fd63908"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c4b64011e458aa2b246cd4e42012cfd83d2d9a5c"},{"fixed":"7ae4e56de7dbd0999578246a536cf52a63f4056d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d36b15e3e7b5937cb1f6ac590a85facc3a320642"},{"fixed":"590a4b2d4e0b73586e88bce9b8135b593355ec09"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0dd8a25f355b4df2d41c08df1716340854c7d4c5"},{"fixed":"e36482b222e00cc7aeeea772fc0cf2943590bc4d"},{"fixed":"76b155e14d9b182ce83d32ada2d0d7219ea8c8dd"},{"fixed":"719edd9f3372ce7fb3b157647c6658672946874b"},{"fixed":"b5c94e4d947d15d521e935ff10c5a22a7883dea5"},{"fixed":"df3dff8ab6d79edc942464999d06fbaedf8cdd18"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.214"},{"fixed":"4.19.324"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.156"},{"fixed":"5.4.286"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.76"},{"fixed":"5.10.230"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.14.15"},{"fixed":"5.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9b5a29f0acefa3eb1dbe2fa302b393eeff64d933"}]}],"versions":["v4.19.323","v4.19.322","v4.19.321","v4.19.320","v4.19.319","v4.19.318","v4.19.317","v4.19.316","v4.19.315","v4.19.314","v4.19.313","v4.19.312","v4.19.311","v4.19.310","v4.19.309","v4.19.308","v4.19.307","v4.19.306","v4.19.305","v4.19.304","v4.19.303","v4.19.302","v4.19.301","v4.19.300","v4.19.299","v4.19.298","v4.19.297","v4.19.296","v4.19.295","v4.19.294","v4.19.293","v4.19.292","v4.19.291","v4.19.290","v4.19.289","v4.19.288","v4.19.287","v4.19.286","v4.19.285","v4.19.284","v4.19.283","v4.19.282","v4.19.281","v4.19.280","v4.19.279","v4.19.278","v4.19.277","v4.19.276","v4.19.275","v4.19.274","v4.19.273","v4.19.272","v4.19.271","v4.19.270","v4.19.269","v4.19.268","v4.19.267","v4.19.266","v4.19.265","v4.19.264","v4.19.263","v4.19.262","v4.19.261","v4.19.260","v4.19.259","v4.19.258","v4.19.257","v4.19.256","v4.19.255","v4.19.254","v4.19.253","v4.19.252","v4.19.251","v4.19.250","v4.19.249","v4.19.248","v4.19.247","v4.19.246","v4.19.245","v4.19.244","v4.19.243","v4.19.242","v4.19.241","v4.19.240","v4.19.239","v4.19.238","v4.19.237","v4.19.236","v4.19.235","v4.19.234","v4.19.233","v4.19.232","v4.19.231","v4.19.230","v4.19.229","v4.19.228","v4.19.227","v4.19.226","v4.19.225","v4.19.224","v4.19.223","v4.19.222","v4.19.221","v4.19.220","v4.19.219","v4.19.218","v4.19.217","v4.19.216","v4.19.215","v4.19.214","v5.4.285","v5.4.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