CVE-2024-53215

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> svcrdma: fix miss destroy percpu_counter in svc_rdma_proc_init()<br /> <br /> There&amp;#39;s issue as follows:<br /> RPC: Registered rdma transport module.<br /> RPC: Registered rdma backchannel transport module.<br /> RPC: Unregistered rdma transport module.<br /> RPC: Unregistered rdma backchannel transport module.<br /> BUG: unable to handle page fault for address: fffffbfff80c609a<br /> PGD 123fee067 P4D 123fee067 PUD 123fea067 PMD 10c624067 PTE 0<br /> Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI<br /> RIP: 0010:percpu_counter_destroy_many+0xf7/0x2a0<br /> Call Trace:<br /> <br /> __die+0x1f/0x70<br /> page_fault_oops+0x2cd/0x860<br /> spurious_kernel_fault+0x36/0x450<br /> do_kern_addr_fault+0xca/0x100<br /> exc_page_fault+0x128/0x150<br /> asm_exc_page_fault+0x26/0x30<br /> percpu_counter_destroy_many+0xf7/0x2a0<br /> mmdrop+0x209/0x350<br /> finish_task_switch.isra.0+0x481/0x840<br /> schedule_tail+0xe/0xd0<br /> ret_from_fork+0x23/0x80<br /> ret_from_fork_asm+0x1a/0x30<br /> <br /> <br /> If register_sysctl() return NULL, then svc_rdma_proc_cleanup() will not<br /> destroy the percpu counters which init in svc_rdma_proc_init().<br /> If CONFIG_HOTPLUG_CPU is enabled, residual nodes may be in the<br /> &amp;#39;percpu_counters&amp;#39; list. The above issue may occur once the module is<br /> removed. If the CONFIG_HOTPLUG_CPU configuration is not enabled, memory<br /> leakage occurs.<br /> To solve above issue just destroy all percpu counters when<br /> register_sysctl() return NULL.