syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=daac/1/0x4000000000000000 softirq=53841/53841 fqs=7
rcu: 	(detected by 1, t=10503 jiffies, g=39309, q=432 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11215 Comm: kworker/u8:13 Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x11/0x90 kernel/kcov.c:246
Code: cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 cf 0b 75 7e <65> 8b 05 d0 0b 75 7e a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00
RSP: 0018:ffffc90000007e28 EFLAGS: 00000046
RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff817bf8b0
RDX: ffff88802adba440 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 1816546128000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000007 R12: ffff88805ff85340
R13: ffff8880b862cb00 R14: ffff8880b862ca00 R15: ffffffff893c2970
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3061fffc CR3: 00000000613da000 CR4: 00000000003526f0
DR0: 0040000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1705 [inline]
 __hrtimer_run_queues+0x460/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/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:console_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3211
Code: 00 e8 00 1d 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 1e 70 20 00 48 85 db 0f 85 55 01 00 00 e8 a0 6d 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 55 55 83
RSP: 0018:ffffc90004b9f638 EFLAGS: 00000293
RAX: ffffffff8ee94358 RBX: 0000000000000000 RCX: ffffffff816e5ef2
RDX: ffff88802adba440 RSI: ffffffff816e5f00 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000007 R12: ffffffff8ee94358
R13: ffffffff8ee94300 R14: ffffc90004b9f6c8 R15: dffffc0000000000
 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
 console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
 vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86
 _printk+0xc8/0x100 kernel/printk/printk.c:2457
 batadv_hardif_deactivate_interface net/batman-adv/hard-interface.c:696 [inline]
 batadv_hardif_deactivate_interface net/batman-adv/hard-interface.c:688 [inline]
 batadv_hardif_disable_interface+0x171/0xf10 net/batman-adv/hard-interface.c:828
 batadv_softif_destroy_netlink+0xa9/0x180 net/batman-adv/soft-interface.c:1107
 default_device_exit_batch+0x778/0xae0 net/core/dev.c:12062
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177
 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:632
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 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
 </TASK>
rcu: rcu_preempt kthread starved for 10470 jiffies! g39309 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:28440 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5833 Comm: syz-executor Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x458/0x1300 kernel/smp.c:884
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 2a 17 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 a7 0c 00 00 8b 43 08 31
RSP: 0018:ffffc900026d7990 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b86469c0 RCX: ffffffff8182b59c
RDX: ffff88802f45a440 RSI: ffffffff8182b576 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170c8d39
R13: 0000000000000001 R14: ffff8880b86469c8 R15: ffff8880b873fe40
FS:  0000555584e82500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c383d3c CR3: 00000000613da000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:938 [inline]
 flush_tlb_mm_range+0x289/0x330 arch/x86/mm/tlb.c:1024
 dup_mmap kernel/fork.c:773 [inline]
 dup_mm kernel/fork.c:1675 [inline]
 copy_mm kernel/fork.c:1724 [inline]
 copy_process+0x721b/0x8cc0 kernel/fork.c:2375
 kernel_clone+0xfd/0x960 kernel/fork.c:2787
 __do_sys_clone+0xba/0x100 kernel/fork.c:2930
 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: 0033:0x7fae1b777053
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffe42392fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fae1b777053
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000555584e827d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000056db4 R14: 0000000000056db4 R15: 00007ffe42393160
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 226s! [syz-executor:5833]
Modules linked in:
irq event stamp: 3011634
hardirqs last  enabled at (3011633): [<ffffffff8b2f976b>] irqentry_exit+0x3b/0x90 kernel/entry/common.c:357
hardirqs last disabled at (3011634): [<ffffffff8b2f7eee>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049
softirqs last  enabled at (3011626): [<ffffffff81510cbb>] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last  enabled at (3011626): [<ffffffff81510cbb>] handle_softirqs+0x5bb/0x8f0 kernel/softirq.c:582
softirqs last disabled at (3011605): [<ffffffff81511189>] __do_softirq kernel/softirq.c:588 [inline]
softirqs last disabled at (3011605): [<ffffffff81511189>] invoke_softirq kernel/softirq.c:428 [inline]
softirqs last disabled at (3011605): [<ffffffff81511189>] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:655
CPU: 1 UID: 0 PID: 5833 Comm: syz-executor Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x472/0x1300 kernel/smp.c:884
Code: 83 e5 07 49 01 c4 83 c5 03 e8 2a 17 0c 00 f3 90 41 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 a7 0c 00 00 8b 43 08 31 ff 83 e0 01 <41> 89 c5 89 c6 e8 44 19 0c 00 45 85 ed 75 d0 e8 fa 16 0c 00 e8 f5
RSP: 0018:ffffc900026d7990 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b86469c0 RCX: ffffffff8182b59c
RDX: ffff88802f45a440 RSI: ffffffff8182b576 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170c8d39
R13: 0000000000000001 R14: ffff8880b86469c8 R15: ffff8880b873fe40
FS:  0000555584e82500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c383d3c CR3: 00000000613da000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:938 [inline]
 flush_tlb_mm_range+0x289/0x330 arch/x86/mm/tlb.c:1024
 dup_mmap kernel/fork.c:773 [inline]
 dup_mm kernel/fork.c:1675 [inline]
 copy_mm kernel/fork.c:1724 [inline]
 copy_process+0x721b/0x8cc0 kernel/fork.c:2375
 kernel_clone+0xfd/0x960 kernel/fork.c:2787
 __do_sys_clone+0xba/0x100 kernel/fork.c:2930
 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: 0033:0x7fae1b777053
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffe42392fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fae1b777053
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000555584e827d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000056db4 R14: 0000000000056db4 R15: 00007ffe42393160
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11215 Comm: kworker/u8:13 Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:do_raw_spin_lock+0x2a/0x2c0 kernel/locking/spinlock_debug.c:114
Code: f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 56 41 55 41 54 55 53 48 89 fb 48 83 c7 04 48 83 ec 68 48 c7 44 24 08 b3 8a b5 41 <48> 8d 6c 24 08 48 c7 44 24 10 28 fe 94 8d 48 c1 ed 03 48 c7 44 24
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000096
RAX: dffffc0000000000 RBX: ffff88805ff852e8 RCX: ffffffff816a831e
RDX: 0000000000000001 RSI: ffffffff8b6ce1e0 RDI: ffff88805ff852ec
RBP: 000000000003d90c R08: 0000000000000000 R09: fffffbfff2dd0dbe
R10: ffffffff96e86df7 R11: 0000000000000006 R12: ffff88805ff85340
R13: ffff8880b862cb00 R14: ffff88805ff85340 R15: ffffffff893c2970
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3061fffc CR3: 00000000613da000 CR4: 00000000003526f0
DR0: 0040000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xd8/0xc60 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/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:console_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3211
Code: 00 e8 00 1d 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 1e 70 20 00 48 85 db 0f 85 55 01 00 00 e8 a0 6d 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 55 55 83
RSP: 0018:ffffc90004b9f638 EFLAGS: 00000293
RAX: ffffffff8ee94358 RBX: 0000000000000000 RCX: ffffffff816e5ef2
RDX: ffff88802adba440 RSI: ffffffff816e5f00 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000007 R12: ffffffff8ee94358
R13: ffffffff8ee94300 R14: ffffc90004b9f6c8 R15: dffffc0000000000
 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
 console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
 vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86
 _printk+0xc8/0x100 kernel/printk/printk.c:2457
 batadv_hardif_deactivate_interface net/batman-adv/hard-interface.c:696 [inline]
 batadv_hardif_deactivate_interface net/batman-adv/hard-interface.c:688 [inline]
 batadv_hardif_disable_interface+0x171/0xf10 net/batman-adv/hard-interface.c:828
 batadv_softif_destroy_netlink+0xa9/0x180 net/batman-adv/soft-interface.c:1107
 default_device_exit_batch+0x778/0xae0 net/core/dev.c:12062
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177
 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:632
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 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
 </TASK>