rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-0): P5485/2:b..l
rcu: (detected by 0, t=11660 jiffies, g=27121, q=803 ncpus=1)
task:syz-executor state:R running task stack:21832 pid:5485 tgid:5485 ppid:5481 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16fd/0x4cf0 kernel/sched/core.c:6786
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7109
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x185/0x360 kernel/locking/lockdep.c:5875
Code: 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 6b 44 02 11 48 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 8d 07 d4 09 cc 65 8b 05 65 84 02 11
RSP: 0018:ffffc90002a6f4a0 EFLAGS: 00000282
RAX: 10e99b16bb284b00 RBX: ffffffff82237fbc RCX: 10e99b16bb284b00
RDX: 0000000000000000 RSI: ffffffff8db87252 RDI: ffffffff8be29e80
RBP: ffffffff8172aae5 R08: 0000000000000000 R09: ffffffff8172aae5
R10: ffffc90002a6f5f8 R11: ffffffff81acfe40 R12: 0000000000000002
R13: ffffffff8e13f0e0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
skb_clone+0x212/0x3a0 net/core/skbuff.c:2050
__netlink_deliver_tap_skb net/netlink/af_netlink.c:300 [inline]
__netlink_deliver_tap+0x404/0x850 net/netlink/af_netlink.c:325
netlink_deliver_tap+0x19c/0x1b0 net/netlink/af_netlink.c:338
netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x730/0x8e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:727
__sys_sendto+0x3bd/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc92739083c
RSP: 002b:00007ffdbe9b54d0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc9280e4620 RCX: 00007fc92739083c
RDX: 0000000000000020 RSI: 00007fc9280e4670 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007ffdbe9b5524 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005
R13: 00007ffdbe9b558c R14: 00007fc9280e4670 R15: 0000000000000000
rcu: rcu_preempt kthread timer wakeup didn't happen for 4940 jiffies! g27121 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=19161
rcu: rcu_preempt kthread starved for 4941 jiffies! g27121 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:28808 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16fd/0x4cf0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 49 Comm: kworker/0:2 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:stack_trace_save+0x6f/0xe0 kernel/stacktrace.c:116
Code: 48 c1 eb 03 48 b9 f1 f1 f1 f1 00 00 00 f3 49 be 00 00 00 00 00 fc ff df 4a 89 0c 33 42 c7 44 33 08 f3 f3 f3 f3 48 89 7c 24 20 <89> 74 24 28 ff c2 89 54 24 2c 48 c7 44 24 30 00 00 00 00 65 48 8b
RSP: 0018:ffffc90000aa77a0 EFLAGS: 00000a02
RAX: ffffc90000aa77c0 RBX: 1ffff92000154ef4 RCX: f3000000f1f1f1f1
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90000aa7880
RBP: ffffc90000aa7830 R08: ffffc90000aa78ff R09: 0000000000000000
R10: ffffc90000aa7880 R11: fffff52000154f20 R12: ffff888050e26610
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88804f1aed40
FS: 0000000000000000(0000) GS:ffff88808d218000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3802c33b50 CR3: 000000000df38000 CR4: 0000000000352ef0
Call Trace:
ref_tracker_free+0xef/0x7d0 lib/ref_tracker.c:239
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
neigh_destroy+0x34f/0x5c0 net/core/neighbour.c:868
neigh_periodic_work+0xa7a/0xd60 net/core/neighbour.c:957
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245