rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10392/1:b..l
(detected by 1, t=10503 jiffies, g=324509, q=100)
task:syz-executor.5 state:R running task stack:23792 pid: 8725 ppid: 8629 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4683 [inline]
__schedule+0x934/0x2710 kernel/sched/core.c:5940
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6328
irqentry_exit+0x31/0x80 kernel/entry/common.c:427
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593
Code: e1 a6 7e 83 f8 01 0f 85 a6 02 00 00 9c 58 f6 c4 02 0f 85 91 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:ffffc90001dff990 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920003bff34 RCX: cecef2c0e6e98917
RDX: 1ffff11006fb513d RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fcb38a7
R10: fffffbfff1f96714 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8b97bac0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
rcu_read_lock include/linux/rcupdate.h:671 [inline]
ext4_get_group_desc+0x146/0x510 fs/ext4/balloc.c:284
recently_deleted fs/ext4/ialloc.c:684 [inline]
find_inode_bit+0x1c4/0x580 fs/ext4/ialloc.c:730
__ext4_new_inode+0xc4d/0x5c10 fs/ext4/ialloc.c:1065
ext4_mkdir+0x33a/0xb20 fs/ext4/namei.c:2921
vfs_mkdir+0x538/0x770 fs/namei.c:3813
do_mkdirat+0x284/0x310 fs/namei.c:3838
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4656e7
RSP: 002b:00007fff98066518 EFLAGS: 00000206 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fff980665b0 RCX: 00000000004656e7
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff980665b0
RBP: 00007fff9806658c R08: 0000000000000000 R09: 0000000000000006
R10: 00007fff980662b4 R11: 0000000000000206 R12: 0000000000000032
R13: 00000000001af4f3 R14: 000000000000000d R15: 00007fff980665f0
task:kworker/u4:20 state:R running task stack:25000 pid:10392 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:4683 [inline]
__schedule+0x934/0x2710 kernel/sched/core.c:5940
preempt_schedule_notrace+0x5b/0xd0 kernel/sched/core.c:6179
preempt_schedule_notrace_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:36
rcu_read_unlock_sched_notrace include/linux/rcupdate.h:809 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x461/0x510 kernel/locking/lockdep.c:5596
rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
rcu_read_lock include/linux/rcupdate.h:671 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:756 [inline]
batadv_iv_ogm_schedule_buff+0x5d0/0x1410 net/batman-adv/bat_iv_ogm.c:827
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:871 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:864 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x740/0x8e0 net/batman-adv/bat_iv_ogm.c:1725
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread starved for 10547 jiffies! g324509 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:28512 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4683 [inline]
__schedule+0x934/0x2710 kernel/sched/core.c:5940
schedule+0xd3/0x270 kernel/sched/core.c:6019
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1892
rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
rcu_gp_kthread+0xd1a/0x2300 kernel/rcu/tree.c:2177
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 12233 Comm: syz-executor.3 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1d1/0x1d6 kernel/rcu/tree_stall.h:478
print_other_cpu_stall kernel/rcu/tree_stall.h:583 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:708 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq+0x2001/0x20c0 kernel/rcu/tree.c:2649
update_process_times+0x16d/0x200 kernel/time/timer.c:1796
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x737/0x1330 drivers/net/wireless/mac80211_hwsim.c:1517
Code: b6 44 24 08 84 c0 0f 85 a8 06 00 00 e8 f2 2e 48 fc e8 ed 2e 48 fc 48 89 d8 48 c1 e8 03 80 3c 28 00 0f 85 93 09 00 00 48 8b 1b <48> 81 fb 00 31 77 8c 0f 84 f7 04 00 00 e8 c7 2e 48 fc 49 39 de 4c
RSP: 0018:ffffc90000dc0ba0 EFLAGS: 00000246
RAX: 1ffff1100247a64c RBX: ffff888077973260 RCX: 0000000000000100
RDX: ffff88808cdf9c40 RSI: ffffffff852d5303 RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffff852d5379 R11: 0000000000000000 R12: ffff88802c838500
R13: ffff88802770b490 R14: ffff88802770b260 R15: 0000000000000000
mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784
mac80211_hwsim_beacon_tx+0x4b7/0x920 drivers/net/wireless/mac80211_hwsim.c:1838
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618
__do_softirq+0x29b/0x9bd kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6328
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 62 d7 2d f8 e8 cd ff 59 f8 fb bf 01 00 00 00 b2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 70 c6 2d
RSP: 0018:ffffc900021af828 EFLAGS: 00000202
RAX: 0000000000000613 RBX: ffff88808cdf9c40 RCX: 1ffffffff1ad59e1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed10119bf388 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817b9778 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irqentry_exit+0x31/0x80 kernel/entry/common.c:427
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__netlink_deliver_tap_skb net/netlink/af_netlink.c:304 [inline]
RIP: 0010:__netlink_deliver_tap net/netlink/af_netlink.c:321 [inline]
RIP: 0010:netlink_deliver_tap+0x9a2/0xba0 net/netlink/af_netlink.c:334
Code: 89 44 24 18 e8 8f 98 6f fa 4c 8b 44 24 18 66 45 89 a8 b4 00 00 00 4c 89 c7 e8 ba 60 c6 ff 31 ff 41 89 c5 89 c6 e8 ee f5 29 fa <45> 85 ed 0f 8f d2 00 00 00 e8 a0 ee 29 fa 48 8b 7c 24 10 be 04 00
RSP: 0018:ffffc900021af8f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88802c252000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88808cdf9c40 RDI: 0000000000000003
RBP: ffff88802d06f500 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff874b9342 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 000000000000000e R15: ffff88802c252c00
netlink_deliver_tap_kernel net/netlink/af_netlink.c:343 [inline]
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x5e5/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x85b/0xda0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:702 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:722
____sys_sendmsg+0x6e8/0x810 net/socket.c:2385
___sys_sendmsg+0xf3/0x170 net/socket.c:2439
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2468
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f064180f188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd08b633df R14: 00007f064180f300 R15: 0000000000022000