rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 ticks this GP) idle=e5c4/1/0x4000000000000000 softirq=53141/53141 fqs=2098
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 52500(ms)
rcu: 	(detected by 1, t=10505 jiffies, g=46565, q=166 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13026 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__lock_acquire+0x1290/0x2100 kernel/locking/lockdep.c:5225
Code: 12 48 89 df e8 e1 9d 88 00 48 bf 00 00 00 00 00 fc ff df 48 83 3b 00 0f 84 b7 04 00 00 41 0f b6 04 3e 84 c0 0f 85 62 0a 00 00 <48> 8b 44 24 10 8b 18 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d
RSP: 0018:ffffc90000007a10 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff93c3bfd8 RCX: ffffffff819acdf5
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ed14171d5a5ebe0f R08: ffffffff942c3847 R09: 1ffffffff2858708
R10: dffffc0000000000 R11: fffffbfff2858709 R12: ffff88801df90000
R13: ffff88801df90000 R14: 1ffff11003bf2171 R15: 0000000000000001
FS:  0000555582484500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcce5a57f98 CR3: 000000007dd0c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1801 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 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:console_flush_all+0x996/0xeb0
Code: 48 21 c3 0f 85 16 02 00 00 e8 06 8e 20 00 4c 8b 7c 24 10 4d 85 f6 75 07 e8 f7 8d 20 00 eb 06 e8 f0 8d 20 00 fb 48 8b 5c 24 18 <48> 8b 44 24 30 42 80 3c 28 00 74 08 48 89 df e8 06 9f 84 00 4c 8b
RSP: 0018:ffffc9000460e900 EFLAGS: 00000293
RAX: ffffffff819ecfd0 RBX: ffffffff8f172778 RCX: ffff88801df90000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000460eab0 R08: ffffffff819ecfa7 R09: 1ffffffff2858708
R10: dffffc0000000000 R11: fffffbfff2858709 R12: ffffffff8f172720
R13: dffffc0000000000 R14: 0000000000000200 R15: ffffc9000460eb00
 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
 console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
 _printk+0xd5/0x120 kernel/printk/printk.c:2457
 batadv_hardif_enable_interface+0x7d0/0x9f0 net/batman-adv/hard-interface.c:756
 batadv_softif_slave_add+0x79/0x100 net/batman-adv/soft-interface.c:858
 do_set_master net/core/rtnetlink.c:2926 [inline]
 do_setlink+0xe40/0x4210 net/core/rtnetlink.c:3125
 rtnl_changelink net/core/rtnetlink.c:3732 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3884 [inline]
 rtnl_newlink+0x1bb6/0x2210 net/core/rtnetlink.c:4021
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:728
 __sys_sendto+0x363/0x4c0 net/socket.c:2182
 __do_sys_sendto net/socket.c:2189 [inline]
 __se_sys_sendto net/socket.c:2185 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2185
 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: 0033:0x7f1af5d8ec3c
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffc371ce610 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1af6ad4620 RCX: 00007f1af5d8ec3c
RDX: 0000000000000028 RSI: 00007f1af6ad4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc371ce664 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f1af6ad4670 R15: 0000000000000000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13026 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:712 [inline]
RIP: 0010:rcu_is_watching+0x6/0xb0 kernel/rcu/tree.c:715
Code: 40 0f 74 03 eb cd 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 53 65 ff 05 78 ba 5e 7e e8 db eb 48 0a 89 c3 83 f8 08 73 7a
RSP: 0018:ffffc90000007d30 EFLAGS: 00000002
RAX: 0000000000010000 RBX: 0000000000000001 RCX: ffffffff81acc210
RDX: ffff88801df90000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000007ea0 R08: ffffffff81acc236 R09: 1ffffffff20344ee
R10: dffffc0000000000 R11: fffffbfff20344ef R12: 1ffff110170c58eb
R13: 0000000000000001 R14: ffff88805723d340 R15: 0000000000000001
FS:  0000555582484500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcce5a57f98 CR3: 000000007dd0c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_hrtimer_expire_exit include/trace/events/timer.h:306 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1804 [inline]
 __hrtimer_run_queues+0x630/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 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:console_flush_all+0x996/0xeb0
Code: 48 21 c3 0f 85 16 02 00 00 e8 06 8e 20 00 4c 8b 7c 24 10 4d 85 f6 75 07 e8 f7 8d 20 00 eb 06 e8 f0 8d 20 00 fb 48 8b 5c 24 18 <48> 8b 44 24 30 42 80 3c 28 00 74 08 48 89 df e8 06 9f 84 00 4c 8b
RSP: 0018:ffffc9000460e900 EFLAGS: 00000293
RAX: ffffffff819ecfd0 RBX: ffffffff8f172778 RCX: ffff88801df90000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000460eab0 R08: ffffffff819ecfa7 R09: 1ffffffff2858708
R10: dffffc0000000000 R11: fffffbfff2858709 R12: ffffffff8f172720
R13: dffffc0000000000 R14: 0000000000000200 R15: ffffc9000460eb00
 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
 console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
 _printk+0xd5/0x120 kernel/printk/printk.c:2457
 batadv_hardif_enable_interface+0x7d0/0x9f0 net/batman-adv/hard-interface.c:756
 batadv_softif_slave_add+0x79/0x100 net/batman-adv/soft-interface.c:858
 do_set_master net/core/rtnetlink.c:2926 [inline]
 do_setlink+0xe40/0x4210 net/core/rtnetlink.c:3125
 rtnl_changelink net/core/rtnetlink.c:3732 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3884 [inline]
 rtnl_newlink+0x1bb6/0x2210 net/core/rtnetlink.c:4021
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:728
 __sys_sendto+0x363/0x4c0 net/socket.c:2182
 __do_sys_sendto net/socket.c:2189 [inline]
 __se_sys_sendto net/socket.c:2185 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2185
 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: 0033:0x7f1af5d8ec3c
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffc371ce610 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1af6ad4620 RCX: 00007f1af5d8ec3c
RDX: 0000000000000028 RSI: 00007f1af6ad4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc371ce664 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f1af6ad4670 R15: 0000000000000000
 </TASK>