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Afterwards, a use-after-free will be triggered\nin the softIRQ after removing the fscache module, as follows:\n\n==================================================================\nBUG: unable to handle page fault for address: fffffbfff803c9e9\n PF: supervisor read access in kernel mode\n PF: error_code(0x0000) - not-present page\nPGD 21ffea067 P4D 21ffea067 PUD 21ffe6067 PMD 110a7c067 PTE 0\nOops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.11.0-rc3 #855\nTainted: [W]=WARN\nRIP: 0010:__run_timer_base.part.0+0x254/0x8a0\nCall Trace:\n \u003CIRQ>\n tmigr_handle_remote_up+0x627/0x810\n __walk_groups.isra.0+0x47/0x140\n tmigr_handle_remote+0x1fa/0x2f0\n handle_softirqs+0x180/0x590\n irq_exit_rcu+0x84/0xb0\n sysvec_apic_timer_interrupt+0x6e/0x90\n \u003C/IRQ>\n \u003CTASK>\n asm_sysvec_apic_timer_interrupt+0x1a/0x20\nRIP: 0010:default_idle+0xf/0x20\n default_idle_call+0x38/0x60\n do_idle+0x2b5/0x300\n cpu_startup_entry+0x54/0x60\n start_secondary+0x20d/0x280\n common_startup_64+0x13e/0x148\n \u003C/TASK>\nModules linked in: [last unloaded: netfs]\n==================================================================\n\nTherefore delete fscache_cookie_lru_timer when removing the fscahe module.",null,[11],{"_key":12,"id":12,"name":13,"description":14,"type":15,"status":16,"abstraction":17,"likelihood_of_exploit":18,"capec":19},"CWE-416","Use After Free","The product reuses or references memory after it has been freed. 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