rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6613/1:b..l
rcu: (detected by 0, t=10506 jiffies, g=17045, q=410 ncpus=2)
task:syz-executor.4 state:R running task stack:27240 pid:6613 ppid:5033 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6710
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7022
irqentry_exit+0x35/0x80 kernel/entry/common.c:433
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1f5/0x520 kernel/locking/lockdep.c:5729
Code: 1c 9d 7e 83 f8 01 0f 85 b9 02 00 00 9c 58 f6 c4 02 0f 85 a4 02 00 00 48 83 7c 24 08 00 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:ffffc90004b67878 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200096cf11 RCX: ee0dc9d05ea20e1e
RDX: 1ffff1100e7a9d60 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff230bfd0
R10: ffffffff9185fe87 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8c9a16c0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
rcu_read_lock include/linux/rcupdate.h:749 [inline]
count_memcg_event_mm.part.0+0x38/0x330 include/linux/memcontrol.h:1105
count_memcg_event_mm include/linux/memcontrol.h:570 [inline]
mm_account_fault mm/memory.c:5113 [inline]
handle_mm_fault+0x3f6/0x9e0 mm/memory.c:5249
do_user_addr_fault+0x661/0x1360 arch/x86/mm/fault.c:1392
handle_page_fault arch/x86/mm/fault.c:1486 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1542
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:fault_in_readable+0x129/0x210 mm/gup.c:1967
Code: 2d c4 ff 48 39 dd 0f 84 ec 00 00 00 45 31 f6 eb 11 e8 5b 2d c4 ff 48 81 c3 00 10 00 00 48 39 eb 74 1d e8 4a 2d c4 ff 45 89 f7 <8a> 03 31 ff 44 89 fe 88 44 24 28 e8 57 29 c4 ff 45 85 ff 74 d2 e8
RSP: 0018:ffffc90004b67b28 EFLAGS: 00050246
RAX: 0000000000040000 RBX: 0000000020124000 RCX: ffffc9000d4ee000
RDX: 0000000000040000 RSI: ffffffff81bfd546 RDI: 0000000000000005
RBP: 0000000020125000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000001000
R13: 00000000201230c0 R14: 0000000000000000 R15: 0000000000000000
fault_in_iov_iter_readable+0x252/0x2c0 lib/iov_iter.c:216
generic_perform_write+0x1c2/0x5d0 mm/filemap.c:3913
__generic_file_write_iter+0x1f8/0x240 mm/filemap.c:4018
generic_file_write_iter+0xe3/0x350 mm/filemap.c:4044
call_write_iter include/linux/fs.h:1871 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x981/0xda0 fs/read_write.c:584
ksys_write+0x122/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f441488c389
RSP: 002b:00007f4415593168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f44149ac050 RCX: 00007f441488c389
RDX: 00000000200000d2 RSI: 00000000200000c0 RDI: 0000000000000006
RBP: 00007f44148d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce9498b1f R14: 00007f4415593300 R15: 0000000000022000
rcu: rcu_preempt kthread starved for 10490 jiffies! g17045 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:28840 pid:15 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6710
schedule+0xde/0x1a0 kernel/sched/core.c:6786
schedule_timeout+0x14e/0x2b0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1609
rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1808
kthread+0x344/0x440 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 75 Comm: kworker/u4:4 Not tainted 6.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:296 [inline]
RIP: 0010:smp_call_function_many_cond+0x694/0x1720 kernel/smp.c:835
Code: 89 ee e8 cf 4e 0b 00 85 ed 74 48 48 8b 44 24 08 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 f4 83 c5 03 e8 8e 52 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 d1 0d 00 00 8b 43 08 31
RSP: 0000:ffffc900020ef948 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9941860 RCX: 0000000000000000
RDX: ffff888019ae60c0 RSI: ffffffff8178b002 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffed101732830d
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa082586058 CR3: 000000000c775000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:1003
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1938 [inline]
text_poke_bp_batch+0x24f/0x780 arch/x86/kernel/alternative.c:2148
text_poke_flush arch/x86/kernel/alternative.c:2339 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2336 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2346
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32f/0x410 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:831 [inline]
toggle_allocation_gate+0xf8/0x230 mm/kfence/core.c:823
process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
kthread+0x344/0x440 kernel/kthread.c:389
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308