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CVE-2024-53215

Description

In the Linux kernel, the following vulnerability has been resolved:svcrdma: fix miss destroy percpu_counter in svc_rdma_proc_init()There's issue as follows:RPC: Registered rdma transport module.RPC: Registered rdma backchannel transport module.RPC: Unregistered rdma transport module.RPC: Unregistered rdma backchannel transport module.BUG: unable to handle page fault for address: fffffbfff80c609aPGD 123fee067 P4D 123fee067 PUD 123fea067 PMD 10c624067 PTE 0Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTIRIP: 0010:percpu_counter_destroy_many+0xf7/0x2a0Call Trace: __die+0x1f/0x70 page_fault_oops+0x2cd/0x860 spurious_kernel_fault+0x36/0x450 do_kern_addr_fault+0xca/0x100 exc_page_fault+0x128/0x150 asm_exc_page_fault+0x26/0x30 percpu_counter_destroy_many+0xf7/0x2a0 mmdrop+0x209/0x350 finish_task_switch.isra.0+0x481/0x840 schedule_tail+0xe/0xd0 ret_from_fork+0x23/0x80 ret_from_fork_asm+0x1a/0x30 If register_sysctl() return NULL, then svc_rdma_proc_cleanup() will notdestroy the percpu counters which init in svc_rdma_proc_init().If CONFIG_HOTPLUG_CPU is enabled, residual nodes may be in the'percpu_counters' list. The above issue may occur once the module isremoved. If the CONFIG_HOTPLUG_CPU configuration is not enabled, memoryleakage occurs.To solve above issue just destroy all percpu counters whenregister_sysctl() return NULL.

POC

Reference

No PoCs from references.

Github

- https://github.com/cku-heise/euvd-api-doc

- https://github.com/w4zu/Debian_security