rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (2 ticks this GP) idle=1494/1/0x4000000000000000 softirq=35949/35987 fqs=35
rcu: (detected by 0, t=10502 jiffies, g=55465, q=700 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15177 Comm: syz.0.4427 Not tainted 6.11.0-rc7-syzkaller-00135-gb7718454f937 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:debug_object_deactivate+0xb6/0x390 lib/debugobjects.c:754
Code: 10 00 00 00 4c 89 e7 31 f6 e8 e6 f8 45 fd 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 29 02 00 00 c7 44 24 50 05 00 00 00 <49> 8d 7c 24 14 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 25
RSP: 0018:ffffc90000a18c40 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90000a18c90 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000a18c90
RBP: ffffc90000a18d30 R08: ffffc90000a18c8f R09: 0000000000000000
R10: ffffc90000a18c80 R11: fffff52000143192 R12: ffffc90000a18c80
R13: ffff8880122b2340 R14: dffffc0000000000 R15: 1ffff9200014318c
FS: 00007fd31ff006c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557b9af5c8 CR3: 0000000070c60000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1657 [inline]
__hrtimer_run_queues+0x305/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x4a/0x70 kernel/kcov.c:222
Code: 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 <8b> 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 c3 cc cc
RSP: 0018:ffffc900044fed40 EFLAGS: 00000246
RAX: ffffffff81414211 RBX: ffffffff908ce2ea RCX: ffff888062009e00
RDX: ffffc90009391000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900044fee20 R08: ffffffff8141554b R09: ffffffff814140bf
R10: 0000000000000003 R11: ffff888062009e00 R12: ffffc900044ffab8
R13: dffffc0000000000 R14: ffffc900044fee70 R15: 1ffff9200089fdc4
unwind_next_frame+0x1ac1/0x2a00 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:3106 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3210
__destroy_inode+0x2d9/0x650 fs/inode.c:288
destroy_inode fs/inode.c:311 [inline]
evict+0x7e1/0x950 fs/inode.c:729
__dentry_kill+0x20d/0x630 fs/dcache.c:615
shrink_kill+0xa9/0x2c0 fs/dcache.c:1060
shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1087
prune_dcache_sb+0x10f/0x180 fs/dcache.c:1168
super_cache_scan+0x34f/0x4b0 fs/super.c:221
do_shrink_slab+0x701/0x1160 mm/shrinker.c:435
shrink_slab+0x1093/0x14d0 mm/shrinker.c:662
drop_slab_node mm/vmscan.c:413 [inline]
drop_slab+0x142/0x280 mm/vmscan.c:431
drop_caches_sysctl_handler+0xbc/0x160 fs/drop_caches.c:68
proc_sys_call_handler+0x551/0x8b0 fs/proc/proc_sysctl.c:590
do_iter_readv_writev+0x60a/0x890
vfs_writev+0x37c/0xbb0 fs/read_write.c:971
do_writev+0x1b1/0x350 fs/read_write.c:1018
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd31f17def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd31ff00038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fd31f335f80 RCX: 00007fd31f17def9
RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fd31f1f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd31f335f80 R15: 00007ffd7051e7f8
rcu: rcu_preempt kthread starved for 10431 jiffies! g55465 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:25816 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 11 Comm: kworker/u8:0 Not tainted 6.11.0-rc7-syzkaller-00135-gb7718454f937 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:312 [inline]
RIP: 0010:smp_call_function_many_cond+0x1860/0x29d0 kernel/smp.c:856
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 39 18 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 e4 13 0c 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 c8 13
RSP: 0018:ffffc90000105ec0 EFLAGS: 00000293
RAX: ffffffff81877898 RBX: 1ffff110171288e9 RCX: ffff88801cec3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001060a0 R08: ffffffff81877867 R09: 1ffff92000020bc8
R10: dffffc0000000000 R11: ffffffff8142e670 R12: dffffc0000000000
R13: ffff8880b8944748 R14: ffff8880b883fb00 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3231aff8 CR3: 0000000034be6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 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+0x329/0x5c0 arch/x86/mm/tlb.c:1027
flush_tlb_page arch/x86/include/asm/tlbflush.h:254 [inline]
ptep_clear_flush+0x11a/0x170 mm/pgtable-generic.c:101
page_vma_mkclean_one+0x58a/0x9a0 mm/rmap.c:1029
page_mkclean_one+0x280/0x420 mm/rmap.c:1070
rmap_walk_file+0x52f/0x9f0 mm/rmap.c:2687
rmap_walk mm/rmap.c:2705 [inline]
folio_mkclean+0x262/0x440 mm/rmap.c:1102
folio_clear_dirty_for_io+0x22b/0xcf0 mm/page-writeback.c:3024
mpage_submit_folio+0x88/0x230 fs/ext4/inode.c:1924
mpage_process_page_bufs+0x6c9/0x8d0 fs/ext4/inode.c:2056
mpage_prepare_extent_to_map+0xec7/0x1c80 fs/ext4/inode.c:2564
ext4_do_writepages+0xc52/0x3d40 fs/ext4/inode.c:2706
ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2842
do_writepages+0x35d/0x870 mm/page-writeback.c:2683
__writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1651
writeback_sb_inodes+0x99c/0x1380 fs/fs-writeback.c:1947
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2018
wb_writeback+0x495/0xd40 fs/fs-writeback.c:2129
wb_check_background_flush fs/fs-writeback.c:2199 [inline]
wb_do_writeback fs/fs-writeback.c:2287 [inline]
wb_workfn+0xc58/0x1090 fs/fs-writeback.c:2314
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x870/0xd30 kernel/workqueue.c:3393
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244