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BUG: KMSAN: use-after-free in rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:369 [inline]
BUG: KMSAN: use-after-free in rxrpc_peer_keepalive_worker+0xb82/0x1510 net/rxrpc/peer_event.c:430
CPU: 0 PID: 2904 Comm: kworker/0:2 Not tainted 5.4.0-rc2+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krxrpcd rxrpc_peer_keepalive_worker
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x153/0x2c0 mm/kmsan/kmsan_report.c:113
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
 rxrpc_send_keepalive+0x53c/0x830 net/rxrpc/output.c:634
 rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:369 [inline]
 rxrpc_peer_keepalive_worker+0xb82/0x1510 net/rxrpc/peer_event.c:430
 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:154 [inline]
 kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:137
 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:123
 slab_free_freelist_hook mm/slub.c:1473 [inline]
 slab_free mm/slub.c:3040 [inline]
 kfree+0x4c1/0x2db0 mm/slub.c:3982
 rxrpc_local_rcu+0x7a/0xe0 net/rxrpc/local_object.c:499
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2157 [inline]
 rcu_core+0xc99/0x1b10 kernel/rcu/tree.c:2377
 rcu_core_si+0xe/0x10 kernel/rcu/tree.c:2386
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1139
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837
 kmsan_get_shadow_origin_ptr+0x0/0x4c0
 __tlb_remove_page_size+0x10c/0x560 mm/mmu_gather.c:83
 __tlb_remove_page include/asm-generic/tlb.h:414 [inline]
 zap_pte_range mm/memory.c:1066 [inline]
 zap_pmd_range mm/memory.c:1167 [inline]
 zap_pud_range mm/memory.c:1196 [inline]
 zap_p4d_range mm/memory.c:1217 [inline]
 unmap_page_range+0x20c9/0x3f80 mm/memory.c:1238
 unmap_single_vma+0x43f/0x5e0 mm/memory.c:1283
 unmap_vmas+0x391/0x4b0 mm/memory.c:1315
 exit_mmap+0x50e/0xa00 mm/mmap.c:3161
 __mmput+0x148/0x590 kernel/fork.c:1081
 mmput+0x83/0x90 kernel/fork.c:1102
 exit_mm+0x6b7/0x770 kernel/exit.c:486
 do_exit+0xae4/0x3a70 kernel/exit.c:806
 do_group_exit+0x18a/0x320 kernel/exit.c:923
 get_signal+0xbf6/0x32f0 kernel/signal.c:2734
 do_signal+0x6f/0xe10 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop arch/x86/entry/common.c:159 [inline]
 prepare_exit_to_usermode+0x2c5/0x4d0 arch/x86/entry/common.c:194
 syscall_return_slowpath+0x90/0x610 arch/x86/entry/common.c:274
 do_syscall_64+0xdc/0x160 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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