Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix kernel crash when uninstalling driver When the driver is uninstalled and the VF is disabled concurrently, a kernel crash occurs. The reason is that the two actions call function pci_disable_sriov(). The num_VFs is checked to determine whether to release the corresponding resources. During the second calling, num_VFs is not 0 and the resource release function is called. However, the corresponding resource has been released during the first invoking. Therefore, the problem occurs: [15277.839633][T50670] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... [15278.131557][T50670] Call trace: [15278.134686][T50670] klist_put+0x28/0x12c [15278.138682][T50670] klist_del+0x14/0x20 [15278.142592][T50670] device_del+0xbc/0x3c0 [15278.146676][T50670] pci_remove_bus_device+0x84/0x120 [15278.151714][T50670] pci_stop_and_remove_bus_device+0x6c/0x80 [15278.157447][T50670] pci_iov_remove_virtfn+0xb4/0x12c [15278.162485][T50670] sriov_disable+0x50/0x11c [15278.166829][T50670] pci_disable_sriov+0x24/0x30 [15278.171433][T50670] hnae3_unregister_ae_algo_prepare+0x60/0x90 [hnae3] [15278.178039][T50670] hclge_exit+0x28/0xd0 [hclge] [15278.182730][T50670] __se_sys_delete_module.isra.0+0x164/0x230 [15278.188550][T50670] __arm64_sys_delete_module+0x1c/0x30 [15278.193848][T50670] invoke_syscall+0x50/0x11c [15278.198278][T50670] el0_svc_common.constprop.0+0x158/0x164 [15278.203837][T50670] do_el0_svc+0x34/0xcc [15278.207834][T50670] el0_svc+0x20/0x30 For details, see the following figure. rmmod hclge disable VFs ---------------------------------------------------- hclge_exit() sriov_numvfs_store() ... device_lock() pci_disable_sriov() hns3_pci_sriov_configure() pci_disable_sriov() sriov_disable() sriov_disable() if !num_VFs : if !num_VFs : return; return; sriov_del_vfs() sriov_del_vfs() ... ... klist_put() klist_put() ... ... num_VFs = 0; num_VFs = 0; device_unlock(); In this patch, when driver is removing, we get the device_lock() to protect num_VFs, just like sriov_numvfs_store().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b06ad258e01389ca3ff13bc180f3fcd6a608f1cd before a0df055775f30850c0da8f7dab40d67c0fd63908; affected c4b64011e458aa2b246cd4e42012cfd83d2d9a5c before 7ae4e56de7dbd0999578246a536cf52a63f4056d; affected d36b15e3e7b5937cb1f6ac590a85facc3a320642 before 590a4b2d4e0b73586e88bce9b8135b593355ec09; affected 0dd8a25f355b4df2d41c08df1716340854c7d4c5 before e36482b222e00cc7aeeea772fc0cf2943590bc4d; affected 0dd8a25f355b4df2d41c08df1716340854c7d4c5 before 76b155e14d9b182ce83d32ada2d0d7219ea8c8dd; affected 0dd8a25f355b4df2d41c08df1716340854c7d4c5 before 719edd9f3372ce7fb3b157647c6658672946874b; affected 0dd8a25f355b4df2d41c08df1716340854c7d4c5 before b5c94e4d947d15d521e935ff10c5a22a7883dea5; affected 0dd8a25f355b4df2d41c08df1716340854c7d4c5 before df3dff8ab6d79edc942464999d06fbaedf8cdd18; affected 9b5a29f0acefa3eb1dbe2fa302b393eeff64d933; affected 4.19.214 before 4.19.324; affected 5.4.156 before 5.4.286; affected 5.10.76 before 5.10.230; affected 5.14.15 before 5.15 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 4.19.324 through 4.19.*; unaffected 5.4.286 through 5.4.*; unaffected 5.10.230 through 5.10.*; unaffected 5.15.172 through 5.15.*; unaffected 6.1.117 through 6.1.*; unaffected 6.6.61 through 6.6.*; unaffected 6.11.8 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a0df055775f30850c0da8f7dab40d67c0fd63908
- https://git.kernel.org/stable/c/7ae4e56de7dbd0999578246a536cf52a63f4056d
- https://git.kernel.org/stable/c/590a4b2d4e0b73586e88bce9b8135b593355ec09
- https://git.kernel.org/stable/c/e36482b222e00cc7aeeea772fc0cf2943590bc4d
- https://git.kernel.org/stable/c/76b155e14d9b182ce83d32ada2d0d7219ea8c8dd
- https://git.kernel.org/stable/c/719edd9f3372ce7fb3b157647c6658672946874b
- https://git.kernel.org/stable/c/b5c94e4d947d15d521e935ff10c5a22a7883dea5
- https://git.kernel.org/stable/c/df3dff8ab6d79edc942464999d06fbaedf8cdd18
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.