rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5160/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=8361, q=667 ncpus=2)
task:syz-executor.4 state:R running task stack:20840 pid:5160 tgid:5160 ppid:5154 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1a0b/0x4be0 kernel/sched/core.c:6746
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6925
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6949
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
vprintk_emit+0x690/0x770 kernel/printk/printk.c:2349
_printk+0xd5/0x120 kernel/printk/printk.c:2373
batadv_check_known_mac_addr+0x2b1/0x410 net/batman-adv/hard-interface.c:526
batadv_hard_if_event+0x3a5/0x1850 net/batman-adv/hard-interface.c:998
notifier_call_chain+0x19f/0x3d0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
call_netdevice_notifiers net/core/dev.c:2044 [inline]
dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9043
dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9057
do_setlink+0x8b3/0x41e0 net/core/rtnetlink.c:2855
__rtnl_newlink net/core/rtnetlink.c:3696 [inline]
rtnl_newlink+0x1809/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2191
__do_sys_sendto net/socket.c:2203 [inline]
__se_sys_sendto net/socket.c:2199 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2199
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x88/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3d1c87ebdc
RSP: 002b:00007fff45c75de0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3d1d4d4620 RCX: 00007f3d1c87ebdc
RDX: 000000000000002c RSI: 00007f3d1d4d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff45c75e34 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f3d1d4d4670 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10550 jiffies! g8361 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:26600 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1a0b/0x4be0 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1360 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
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 PID: 5300 Comm: syz-executor.2 Not tainted 6.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0a 7c 3b f6 48 89 df e8 f2 74 3c f6 e8 3d ca 65 f6 fb bf 01 00 00 00 72 4b 2e f6 65 8b 05 f3 33 ce 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc90003b6fc70 EFLAGS: 00000282
RAX: ac560fed572d5800 RBX: ffff888028e8c0c0 RCX: ffffffff93fac503
RDX: dffffc0000000000 RSI: ffffffff8b6a9c80 RDI: 0000000000000001
RBP: ffffc90003b6fdb0 R08: ffffffff8f43632f R09: 1ffffffff1e86c65
R10: dffffc0000000000 R11: fffffbfff1e86c66 R12: 0000000000000021
R13: 1ffff110051d18ab R14: ffff888028e8c558 R15: ffff888028e8c0c0
FS: 00007f24192c06c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24192bff00 CR3: 0000000027f16000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x14dd/0x1740 kernel/signal.c:2914
arch_do_signal_or_restart+0x96/0x830 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc8/0x360 kernel/entry/common.c:218
do_syscall_64+0x94/0x170 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f241847cee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f24192c00c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f24185abf80 RCX: 00007f241847cee9
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f24184c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f24185abf80 R15: 00007ffcf4c44978
sched: RT throttling activated