rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=0f3/1/0x4000000000000000 softirq=10448/10449 fqs=8
(detected by 0, t=10523 jiffies, g=12237, q=3380)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5335 Comm: kworker/u4:7 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:rb_erase+0x3/0xe20 lib/rbtree.c:441
Code: 5d c3 4c 89 fd 48 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 ef e8 bc 5d 92 fd 48 c7 45 00 01 00 00 00 eb ce 66 90 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 28 48 89 74 24 18 48 89 fb 48 b9 00
RSP: 0018:ffffc90000dd0d10 EFLAGS: 00000046
RAX: ffff88807d039340 RBX: ffff8880b8f2a3d8 RCX: ffff88801eb0d940
RDX: 0000000000010000 RSI: ffff8880b8f2a3d0 RDI: ffff88807c190340
RBP: dffffc0000000000 R08: ffffffff8438ae34 R09: fffffbfff1c14c0e
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f832068
R13: ffff88807c190340 R14: ffff8880b8f2a3d0 R15: 1ffff110171e547b
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb961bcf690 CR3: 000000007ca40000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rb_erase_cached include/linux/rbtree.h:126 [inline]
timerqueue_del+0xa8/0xf0 lib/timerqueue.c:57
__remove_hrtimer kernel/time/hrtimer.c:1117 [inline]
__run_hrtimer kernel/time/hrtimer.c:1668 [inline]
__hrtimer_run_queues+0x3e9/0xcf0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969
Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 3c d6 0b 00 41 83 e7 01 75 07 e8 d1 d2 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc900030ae780 EFLAGS: 00000293
RAX: ffffffff8174b234 RBX: 1ffff110171c8541 RCX: ffff88801eb0d940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900030ae8c0 R08: ffffffff8174b204 R09: ffffed10171e7673
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880b8e42a08 R14: ffff8880b8f3b380 R15: 0000000000000001
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:900 [inline]
flush_tlb_mm_range+0x2a5/0x4a0 arch/x86/mm/tlb.c:986
flush_tlb_page arch/x86/include/asm/tlbflush.h:239 [inline]
ptep_clear_flush+0x112/0x150 mm/pgtable-generic.c:97
page_mkclean_one+0x428/0x7b0 mm/rmap.c:938
rmap_walk_file+0x3f8/0x600 mm/rmap.c:2378
rmap_walk mm/rmap.c:2396 [inline]
page_mkclean+0x330/0x490 mm/rmap.c:1006
clear_page_dirty_for_io+0x3ce/0xa60 mm/page-writeback.c:2749
mpage_submit_page+0x90/0x230 fs/ext4/inode.c:2092
mpage_map_and_submit_buffers fs/ext4/inode.c:2360 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2499 [inline]
ext4_writepages+0x204f/0x3d10 fs/ext4/inode.c:2828
do_writepages+0x481/0x730 mm/page-writeback.c:2386
__writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1647
writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:2001
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2106
wb_check_old_data_flush fs/fs-writeback.c:2206 [inline]
wb_do_writeback fs/fs-writeback.c:2259 [inline]
wb_workfn+0xc55/0x1130 fs/fs-writeback.c:2288
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: rcu_preempt kthread starved for 7206 jiffies! g12237 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:26712 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
schedule+0x11b/0x1f0 kernel/sched/core.c:6456
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 5361 Comm: dhcpcd-run-hook Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969
Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 3c d6 0b 00 41 83 e7 01 75 07 e8 d1 d2 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc9000122f7e0 EFLAGS: 00000293
RAX: ffffffff8174b234 RBX: 1ffff110171e80b1 RCX: ffff88802bbd9dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000122f920 R08: ffffffff8174b204 R09: fffffbfff197c97b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8880b8f40588 R14: ffff8880b8e3b380 R15: 0000000000000001
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:900 [inline]
flush_tlb_mm_range+0x2a5/0x4a0 arch/x86/mm/tlb.c:986
tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
tlb_flush_mmu_tlbonly+0x1ab/0x410 include/asm-generic/tlb.h:430
tlb_flush_mmu mm/mmu_gather.c:246 [inline]
tlb_finish_mmu+0xd2/0x320 mm/mmu_gather.c:338
exit_mmap+0x3cd/0x620 mm/mmap.c:3206
__mmput+0x112/0x3b0 kernel/fork.c:1127
exit_mm+0x688/0x7f0 kernel/exit.c:550
do_exit+0x626/0x2480 kernel/exit.c:861
do_group_exit+0x144/0x310 kernel/exit.c:996
__do_sys_exit_group kernel/exit.c:1007 [inline]
__se_sys_exit_group kernel/exit.c:1005 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1005
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb961a57a90
Code: Unable to access opcode bytes at RIP 0x7fb961a57a66.
RSP: 002b:00007fff328fc078 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00005561e9f2be04 RCX: 00007fb961a57a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000003 R08: 00007fff328fc170 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff328fc398
R13: 00007fff328fc3b0 R14: 00005561cab92169 R15: 00007fb961c4ea80