rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=2ab/1/0x4000000000000000 softirq=226063/226063 fqs=2491
(detected by 1, t=10502 jiffies, g=351113, q=5720)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4894 Comm: kworker/u4:6 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:match_held_lock+0x17/0xb0 kernel/locking/lockdep.c:5089
Code: 0b eb 8b 0f 0b eb 87 e8 c7 fa ff ff 0f 1f 80 00 00 00 00 55 53 bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10 00 <72> 59 48 8b 46 08 48 85 c0 75 11 31 ed 48 89 f7 31 f6 e8 b2 fe ff
RSP: 0018:ffffc900000079a0 EFLAGS: 00000083
RAX: 0000000000000005 RBX: ffff88807dbb27d8 RCX: 0000000000010204
RDX: 0000000000000000 RSI: ffffffff8cb1dc60 RDI: ffff88807dbb27d8
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1bfd17e
R10: fffffbfff1bfd17e R11: 0000000000000000 R12: 0000000000000046
R13: ffff88807dbb1d00 R14: 00000000ffffffff R15: ffffffff8cb1dc60
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9eab1a3641 CR3: 000000005db0d000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5380 [inline]
lock_is_held_type+0xb1/0x190 kernel/locking/lockdep.c:5680
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58
lock_release+0x82/0x810 kernel/locking/lockdep.c:5648
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x75/0x130 kernel/locking/spinlock.c:194
debug_object_activate+0x282/0x6a0 lib/debugobjects.c:689
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer kernel/time/hrtimer.c:1084 [inline]
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0x594/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:lock_acquire+0x21f/0x4d0 kernel/locking/lockdep.c:5641
Code: 08 4c 89 f7 e8 72 70 6a 00 f6 84 24 81 00 00 00 02 0f 85 13 02 00 00 41 f7 c4 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 09 00 00 00 00 43 c7 44 2f 11
RSP: 0018:ffffc90002d1f9e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920005a3f4c RCX: ffff88807dbb2758
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000
RBP: ffffc90002d1fb30 R08: dffffc0000000000 R09: fffffbfff1ff35f8
R10: fffffbfff1ff35f8 R11: 0000000000000000 R12: 0000000000000246
R13: 1ffff920005a3f44 R14: ffffc90002d1fa60 R15: dffffc0000000000
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:354 [inline]
batadv_nc_purge_paths+0xe0/0x3f0 net/batman-adv/network-coding.c:446
batadv_nc_worker+0x2da/0x5b0 net/batman-adv/network-coding.c:724
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
rcu: rcu_preempt kthread starved for 5513 jiffies! g351113 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:R running task stack:26576 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 11052 Comm: syz-executor.1 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation+0x1ff/0x270 kernel/rcu/tree_stall.h:481
print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x23d5/0x2bc0 kernel/rcu/tree.c:2597
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xbb7/0xda0 kernel/smp.c:969
Code: e8 fe b7 0b 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0e e8 d9 b3 0b 00 eb 4c 0f 1f 80 00 00 00 00 f3 90 42 0f b6 04 3b <84> c0 75 11 41 f7 45 00 01 00 00 00 74 2b e8 b6 b3 0b 00 eb e4 44
RSP: 0018:ffffc9000380f4a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff1101734831d RCX: ffff8880131cba00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000380f5e0 R08: ffffffff8178e392 R09: ffffffff844a3a40
R10: 0000000000000009 R11: ffff8880131cba00 R12: 0000000000000000
R13: ffff8880b9a418e8 R14: ffff8880b9b3a640 R15: dffffc0000000000
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
__flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:927 [inline]
flush_tlb_mm_range+0x29e/0x490 arch/x86/mm/tlb.c:1013
tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:426 [inline]
tlb_flush_mmu+0x1a7/0x910 mm/mmu_gather.c:248
tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:340
exit_mmap+0x3dd/0x6f0 mm/mmap.c:3172
__mmput+0x111/0x3a0 kernel/fork.c:1113
exit_mm+0x211/0x2f0 kernel/exit.c:507
do_exit+0x688/0x24f0 kernel/exit.c:819
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x1740/0x2120 kernel/signal.c:2852
arch_do_signal_or_restart+0x9c/0x730 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9eab148bc1
Code: Unable to access opcode bytes at RIP 0x7f9eab148b97.
RSP: 002b:00007ffc262ae280 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 000000000000712e RCX: 00007f9eab148bc1
RDX: 00007ffc262ae2c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc262ae34c R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000002490e9 R14: 0000000000000000 R15: 00007ffc262ae3b0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: eb 8b jmp 0xffffff8d
2: 0f 0b ud2
4: eb 87 jmp 0xffffff8d
6: e8 c7 fa ff ff callq 0xfffffad2
b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
12: 55 push %rbp
13: 53 push %rbx
14: bd 01 00 00 00 mov $0x1,%ebp
19: 48 39 77 10 cmp %rsi,0x10(%rdi)
1d: 74 67 je 0x86
1f: 48 89 fb mov %rdi,%rbx
22: 81 7f 20 00 00 10 00 cmpl $0x100000,0x20(%rdi)
* 29: 72 59 jb 0x84 <-- trapping instruction
2b: 48 8b 46 08 mov 0x8(%rsi),%rax
2f: 48 85 c0 test %rax,%rax
32: 75 11 jne 0x45
34: 31 ed xor %ebp,%ebp
36: 48 89 f7 mov %rsi,%rdi
39: 31 f6 xor %esi,%esi
3b: e8 .byte 0xe8
3c: b2 fe mov $0xfe,%dl
3e: ff .byte 0xff