rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=e3b4/1/0x4000000000000000 softirq=22176/22177 fqs=1
rcu: (detected by 0, t=10505 jiffies, g=37237, q=228 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2911 Comm: kworker/u8:7 Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:389 [inline]
RIP: 0010:__rcu_read_lock+0x37/0xf0 kernel/rcu/tree_plugin.h:412
Code: df 55 53 65 48 8b 1d 78 16 93 7e 48 8d bb 44 04 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 a6 00 00 00 65 48 8b 2d 49 16 93 7e 48 8d bd 44 04 00
RSP: 0018:ffffc90000a18d68 EFLAGS: 00000002
RAX: 0000000000000007 RBX: ffff88802b301e00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802b302244
RBP: ffff888029f78810 R08: 0000000000000000 R09: ffffed10038d045d
R10: ffff88801c6822eb R11: 0000000000000000 R12: 0000000000000002
R13: ffff888029f78800 R14: ffff88801c682340 R15: ffff888029f7a800
FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32118ff8 CR3: 000000007b0ec000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock include/linux/rcupdate.h:836 [inline]
advance_sched+0x65c/0xc60 net/sched/sch_taprio.c:985
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5727
Code: c1 05 2a 10 9a 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90009077a18 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200120ef45 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8b4cc7c0 RDI: ffffffff8bb095c0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff28c54f3
R10: ffffffff9462a79f R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff888062111998 R15: 0000000000000000
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xca/0x390 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x94a/0x1060 net/batman-adv/network-coding.c:722
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10500 jiffies! g37237 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 9164 Comm: syz.1.1754 Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:csd_lock_wait kernel/smp.c:312 [inline]
RIP: 0010:smp_call_function_many_cond+0x4e7/0x1420 kernel/smp.c:856
Code: 0c 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 0b 33 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 f7 0c 00 00 8b 43 08 31
RSP: 0018:ffffc900031efa28 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9344b80 RCX: ffffffff817e453b
RDX: ffff88802440da00 RSI: ffffffff817e4515 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed1017268971
R13: 0000000000000001 R14: ffff8880b9344b88 R15: ffff8880b923ffc0
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020056030 CR3: 00000000656bc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:941 [inline]
flush_tlb_mm_range+0x293/0x330 arch/x86/mm/tlb.c:1027
tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:465 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:455 [inline]
tlb_flush_mmu mm/mmu_gather.c:372 [inline]
tlb_finish_mmu+0x3c9/0x7b0 mm/mmu_gather.c:465
exit_mmap+0x3d1/0xb20 mm/mmap.c:3425
__mmput+0x12a/0x480 kernel/fork.c:1345
mmput+0x62/0x70 kernel/fork.c:1367
exit_mm kernel/exit.c:571 [inline]
do_exit+0x9bf/0x2bb0 kernel/exit.c:869
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
__do_sys_exit_group kernel/exit.c:1042 [inline]
__se_sys_exit_group kernel/exit.c:1040 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1040
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82e8379e79
Code: Unable to access opcode bytes at 0x7f82e8379e4f.
RSP: 002b:00007ffc2f5053f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f82e8379e79
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc2f50544c R08: 00007ffc2f5054df R09: 000000000004493e
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000004493e R14: 00000000000448f7 R15: 00007ffc2f5054a0