syzbot

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BUG: KMSAN: uninit-value in spin_lock_bh include/linux/spinlock.h:343 [inline]
BUG: KMSAN: uninit-value in __rxrpc_put_peer net/rxrpc/peer_object.c:415 [inline]
BUG: KMSAN: uninit-value in rxrpc_put_peer+0x333/0x7d0 net/rxrpc/peer_object.c:435
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.3.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
 arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:200 [inline]
 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:695 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:78 [inline]
 do_raw_spin_lock include/linux/spinlock.h:181 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x72/0xb0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 __rxrpc_put_peer net/rxrpc/peer_object.c:415 [inline]
 rxrpc_put_peer+0x333/0x7d0 net/rxrpc/peer_object.c:435
 rxrpc_rcu_destroy_call+0x8a/0x1e0 net/rxrpc/call_object.c:564
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2114 [inline]
 rcu_core+0xb6f/0x1850 kernel/rcu/tree.c:2314
 rcu_core_si+0xe/0x10 kernel/rcu/tree.c:2323
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 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:150 [inline]
 kmsan_internal_poison_shadow+0x53/0x100 mm/kmsan/kmsan.c:134
 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:123
 slab_free_freelist_hook mm/slub.c:1472 [inline]
 slab_free mm/slub.c:3038 [inline]
 kfree+0x4c1/0x2db0 mm/slub.c:3980
 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:2114 [inline]
 rcu_core+0xb6f/0x1850 kernel/rcu/tree.c:2314
 rcu_core_si+0xe/0x10 kernel/rcu/tree.c:2323
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
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