rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=c81c/1/0x4000000000000000 softirq=76482/76483 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P26705/1:b..l
(detected by 0, t=10502 jiffies, g=119697, q=37 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 28504 Comm: syz-executor.0 Not tainted 6.2.0-rc5-syzkaller-00045-g948ef7bb70c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:advance_sched+0x346/0x9b0 net/sched/sch_taprio.c:744
Code: 48 c7 c6 c0 b0 fe 87 48 89 ef e8 85 ed 6b f9 e8 20 37 81 f9 49 8d 7c 24 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 aa 05 00 00 48 8d 6b a0 4d 89 6c 24 10 be 08 00
RSP: 0018:ffffc900003e8db8 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: ffff88802c7dc340 RCX: 0000000000000000
RDX: 1ffff11004646952 RSI: ffffffff87ff4c20 RDI: ffff888023234a90
RBP: ffff888025a90e00 R08: 0000000000000006 R09: 17f09bfcafe137f9
R10: 17f09bfcafe137f9 R11: 0000000000000000 R12: ffff888023234a80
R13: 17f09bfd2fe137fa R14: 0000000000000000 R15: 17f09bfd2fe137fa
FS: 00007f48d9e2d700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32025000 CR3: 000000002efb5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x690/0xfb0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x320/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
__sysvec_apic_timer_interrupt+0x180/0x640 arch/x86/kernel/apic/apic.c:1113
sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__wake_up_sync_key+0x0/0x20 kernel/sched/wait.c:204
Code: 31 c9 ba 01 00 00 00 be 01 00 00 00 e9 49 fd ff ff 48 89 ef e8 01 01 6e 00 eb d2 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1e fa 48 85 ff 49 89 d0 74 0f b9 10 00 00 00 ba 01 00 00 00
RSP: 0018:ffffc9000589f870 EFLAGS: 00000212
RAX: 0000000000003938 RBX: 0000000000000002 RCX: ffffc90004472000
RDX: 0000000000000304 RSI: 0000000000000001 RDI: ffff888090f7c6c0
RBP: ffff88807af4d840 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffff888090f7c000
R13: ffff888090f7c528 R14: ffff888090f7c700 R15: ffff888090f7c1b8
__unix_dgram_recvmsg+0x2d1/0xb90 net/unix/af_unix.c:2472
unix_dgram_recvmsg+0xc4/0xf0 net/unix/af_unix.c:2542
sock_recvmsg_nosec net/socket.c:995 [inline]
____sys_recvmsg+0x53c/0x610 net/socket.c:2693
___sys_recvmsg+0xf2/0x180 net/socket.c:2737
do_recvmmsg+0x25e/0x6e0 net/socket.c:2831
__sys_recvmmsg net/socket.c:2910 [inline]
__do_sys_recvmmsg net/socket.c:2933 [inline]
__se_sys_recvmmsg net/socket.c:2926 [inline]
__x64_sys_recvmmsg+0x20f/0x260 net/socket.c:2926
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f48d908c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48d9e2d168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f48d91ac050 RCX: 00007f48d908c0c9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f48d90e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffca0bfabff R14: 00007f48d9e2d300 R15: 0000000000022000
task:kworker/u4:49 state:R running task stack:26952 pid:26705 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
preempt_schedule_irq+0x52/0xa0 kernel/sched/core.c:6918
irqentry_exit+0x35/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636
Code: 60 9f 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 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:ffffc90004f87b90 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920009f0f75 RCX: 826849335fefa570
RDX: 1ffff11006d8a996 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff91330ac7
R10: fffffbfff2266158 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8c78eb40 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:325 [inline]
rcu_read_lock include/linux/rcupdate.h:764 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x131/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: rcu_preempt kthread starved for 10502 jiffies! g119697 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:28344 pid:15 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1656
rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1855
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 27095 Comm: kworker/u4:112 Not tainted 6.2.0-rc5-syzkaller-00045-g948ef7bb70c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:207
Code: a8 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 8b 05 fd 28 83 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 40 ac 03 00 a9 00 01 ff 00 74 0e
RSP: 0018:ffffc9000b027970 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b993f5a0 RCX: 0000000000000001
RDX: ffff88807f078100 RSI: ffffffff8175850d RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed1017327eb5 R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48d9e2d718 CR3: 000000000c48e000 CR4: 00000000003506f0
Call Trace:
rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
csd_lock_wait kernel/smp.c:413 [inline]
smp_call_function_many_cond+0x43d/0x10a0 kernel/smp.c:987
on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:1155
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1772 [inline]
text_poke_bp_batch+0x22e/0x6b0 arch/x86/kernel/alternative.c:1963
text_poke_flush arch/x86/kernel/alternative.c:2131 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2128 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2138
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32f/0x410 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:799 [inline]
toggle_allocation_gate+0xf8/0x230 mm/kfence/core.c:791
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308