CVE-2024-50296
HuaWei Net-Series: Kernel Crash Due to Simultaneous Driver Uninstallation and VF Disabling
Description
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().
INFO
Published Date :
Nov. 19, 2024, 2:16 a.m.
Last Modified :
Nov. 27, 2024, 3:24 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
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CVE-2024-50296.
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The following list is the news that have been mention
CVE-2024-50296 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-50296 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Nov. 27, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19.214 up to (excluding) 4.19.324 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.156 up to (excluding) 5.4.286 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10.76 up to (excluding) 5.10.230 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.14.15 up to (excluding) 5.15 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.172 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.117 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.61 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.11.8 *cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/590a4b2d4e0b73586e88bce9b8135b593355ec09 No Types Assigned https://git.kernel.org/stable/c/590a4b2d4e0b73586e88bce9b8135b593355ec09 Patch Changed Reference Type https://git.kernel.org/stable/c/719edd9f3372ce7fb3b157647c6658672946874b No Types Assigned https://git.kernel.org/stable/c/719edd9f3372ce7fb3b157647c6658672946874b Patch Changed Reference Type https://git.kernel.org/stable/c/76b155e14d9b182ce83d32ada2d0d7219ea8c8dd No Types Assigned https://git.kernel.org/stable/c/76b155e14d9b182ce83d32ada2d0d7219ea8c8dd Patch Changed Reference Type https://git.kernel.org/stable/c/7ae4e56de7dbd0999578246a536cf52a63f4056d No Types Assigned https://git.kernel.org/stable/c/7ae4e56de7dbd0999578246a536cf52a63f4056d Patch Changed Reference Type https://git.kernel.org/stable/c/a0df055775f30850c0da8f7dab40d67c0fd63908 No Types Assigned https://git.kernel.org/stable/c/a0df055775f30850c0da8f7dab40d67c0fd63908 Patch Changed Reference Type https://git.kernel.org/stable/c/b5c94e4d947d15d521e935ff10c5a22a7883dea5 No Types Assigned https://git.kernel.org/stable/c/b5c94e4d947d15d521e935ff10c5a22a7883dea5 Patch Changed Reference Type https://git.kernel.org/stable/c/df3dff8ab6d79edc942464999d06fbaedf8cdd18 No Types Assigned https://git.kernel.org/stable/c/df3dff8ab6d79edc942464999d06fbaedf8cdd18 Patch Changed Reference Type https://git.kernel.org/stable/c/e36482b222e00cc7aeeea772fc0cf2943590bc4d No Types Assigned https://git.kernel.org/stable/c/e36482b222e00cc7aeeea772fc0cf2943590bc4d Patch -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Nov. 19, 2024
Action Type Old Value New Value Added Description 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(). Added Reference kernel.org https://git.kernel.org/stable/c/a0df055775f30850c0da8f7dab40d67c0fd63908 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7ae4e56de7dbd0999578246a536cf52a63f4056d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/590a4b2d4e0b73586e88bce9b8135b593355ec09 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e36482b222e00cc7aeeea772fc0cf2943590bc4d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/76b155e14d9b182ce83d32ada2d0d7219ea8c8dd [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/719edd9f3372ce7fb3b157647c6658672946874b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b5c94e4d947d15d521e935ff10c5a22a7883dea5 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/df3dff8ab6d79edc942464999d06fbaedf8cdd18 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-50296 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-50296
weaknesses.