syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=3ea4/1/0x4000000000000000 softirq=63988/63989 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15353/1:b..l
rcu: 	(detected by 1, t=10506 jiffies, g=64293, q=201 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15354 Comm: syz-executor Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:589 [inline]
RIP: 0010:queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline]
RIP: 0010:do_raw_spin_unlock+0x126/0x8b0 kernel/locking/spinlock_debug.c:142
Code: 0f 85 cf 03 00 00 41 c7 06 ff ff ff ff 48 c7 c0 b0 3f 7a 8e 48 c1 e8 03 80 3c 28 00 74 0c 48 c7 c7 b0 3f 7a 8e e8 7a 32 87 00 <48> 83 3d 62 21 fe 0c 00 0f 84 9f 05 00 00 4c 89 ff e8 44 8e 47 0a
RSP: 0018:ffffc90000007b20 EFLAGS: 00000046
RAX: 1ffffffff1cf47f6 RBX: 1ffffffff34bea52 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff9a5f5288
RBP: dffffc0000000000 R08: ffffffff9a5f528b R09: 1ffffffff34bea51
R10: dffffc0000000000 R11: fffffbfff34bea52 R12: 1ffffffff34bea53
R13: ffffffff9a5f5298 R14: ffffffff9a5f5290 R15: ffffffff9a5f5288
FS:  0000555583c96500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556afe808 CR3: 0000000062eb8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock_irqrestore+0x81/0x140 kernel/locking/spinlock.c:194
 debug_object_deactivate+0x2d5/0x390 lib/debugobjects.c:888
 debug_hrtimer_deactivate kernel/time/hrtimer.c:433 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:475
 __run_hrtimer kernel/time/hrtimer.c:1707 [inline]
 __hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:find_va_links mm/vmalloc.c:1113 [inline]
RIP: 0010:insert_vmap_area+0xd7/0x510 mm/vmalloc.c:1328
Code: 8b 64 24 30 4d 85 e4 74 2b 4c 89 e0 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 e7 e8 b4 b2 10 00 49 83 3c 24 00 0f 84 14 04 00 00 <e8> b4 d5 ac ff 4d 89 e5 eb 05 e8 aa d5 ac ff 48 8b 44 24 10 48 8d
RSP: 0018:ffffc90003bcf980 EFLAGS: 00000286
RAX: 1ffff1100358c634 RBX: 0000000000001958 RCX: ffff888061c98000
RDX: 0000000000000000 RSI: ffff88801ac631a0 RDI: ffff888032ee6b60
RBP: ffffc90003bcfa70 R08: 0000000000000003 R09: fffff52000779f40
R10: dffffc0000000000 R11: fffff52000779f40 R12: ffff88801ac631a0
R13: ffffc90003bcfa00 R14: dffffc0000000000 R15: ffff88801ac631a0
 alloc_vmap_area+0x1ca0/0x2400 mm/vmalloc.c:2028
 __get_vm_area_node+0x1c8/0x2d0 mm/vmalloc.c:3137
 __vmalloc_node_range_noprof+0x344/0x1380 mm/vmalloc.c:3806
 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:4000
 kcov_ioctl+0x56/0x640 kernel/kcov.c:716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 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: 0033:0x7f6b01f8592b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffcaad62ce0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000080000 RCX: 00007f6b01f8592b
RDX: 0000000000080000 RSI: ffffffff80086301 RDI: 00000000000000d9
RBP: 00007f6b02176118 R08: 00000000000000d8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
task:syz-executor    state:R  running task     stack:22784 pid:15353 tgid:15353 ppid:5809   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x6c/0xb0 kernel/rcu/tree.c:737
Code: 7e 00 48 c7 c3 d8 7c 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 22 8b 03 65 ff 0d 31 c5 7e 7e 74 10 83 e0 04 <c1> e8 02 5b 41 5e 41 5f c3 cc cc cc cc e8 62 38 85 ff eb e9 89 d9
RSP: 0018:ffffc9000e5f76f0 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffff8880b8737cd8 RCX: ffff888061c99e00
RDX: ffff888061c99e00 RSI: ffffffff8c5edd40 RDI: ffffffff8c5edd00
RBP: ffffc9000e5f7808 R08: ffffffff820ed596 R09: 1ffff11003d02e4a
R10: dffffc0000000000 R11: ffffed1003d02e4b R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e2d0b58 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:878 [inline]
 page_ext_put+0x2f/0xc0 mm/page_ext.c:550
 __set_page_owner+0x3f0/0x800 mm/page_owner.c:328
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558
 prep_new_page mm/page_alloc.c:1566 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3846
 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:4000
 kcov_ioctl+0x56/0x640 kernel/kcov.c:716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 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: 0033:0x7f22d938592b
RSP: 002b:00007fff7dbe02e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000080000 RCX: 00007f22d938592b
RDX: 0000000000080000 RSI: ffffffff80086301 RDI: 00000000000000db
RBP: 00007f22d95762d8 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g64293 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:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 15355 Comm: syz.4.2683 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1064
Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 fa 7a 54 00 e8 b5 34 5c 00 45 38 f7 75 15 66 90 e8 69 7a 54 00 0f 00 2d b2 18 bd 0a fb f4 <e9> 50 fe ff ff e8 56 7a 54 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38
RSP: 0018:ffffc90003c2f280 EFLAGS: 000002d3
RAX: ffffffff814af967 RBX: ffff88801ac631b8 RCX: ffff88802d7dbc00
RDX: 0000000000000000 RSI: ffffffff8c0a98e0 RDI: ffffffff8c5edd60
RBP: ffffc90003c2f350 R08: ffffffff9427188f R09: 1ffffffff284e311
R10: dffffc0000000000 R11: fffffbfff284e312 R12: 1ffff92000785e54
R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003
FS:  000055556c75e500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1d7f37d58 CR3: 000000004e3ac000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:596 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x8d0/0xdb0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 alloc_vmap_area+0x1c88/0x2400 mm/vmalloc.c:2027
 __get_vm_area_node+0x1c8/0x2d0 mm/vmalloc.c:3137
 __vmalloc_node_range_noprof+0x344/0x1380 mm/vmalloc.c:3806
 alloc_thread_stack_node kernel/fork.c:314 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1116
 copy_process+0x5d1/0x3d50 kernel/fork.c:2224
 kernel_clone+0x223/0x870 kernel/fork.c:2806
 __do_sys_clone3 kernel/fork.c:3110 [inline]
 __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3089
 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: 0033:0x7fc1d71ba589
Code: 1b 08 00 48 8d 3d fc 1b 08 00 e8 12 29 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007fff7754cc98 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fc1d713c9a0 RCX: 00007fc1d71ba589
RDX: 00007fc1d713c9a0 RSI: 0000000000000058 RDI: 00007fff7754cce0
RBP: 00007fc1d7f376c0 R08: 00007fc1d7f376c0 R09: 00007fff7754cdc7
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007fff7754cce0 R15: 00007fff7754cdc8
 </TASK>