rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=6ba/1/0x4000000000000000 softirq=12620/12647 fqs=0
(t=17462 jiffies g=9217 q=667)
rcu: rcu_preempt kthread timer wakeup didn't happen for 17461 jiffies! g9217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=2549
rcu: rcu_preempt kthread starved for 17462 jiffies! g9217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28928 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4683 [inline]
__schedule+0x907/0x26b0 kernel/sched/core.c:5940
schedule+0xd3/0x270 kernel/sched/core.c:6019
schedule_timeout+0x11d/0x250 kernel/time/timer.c:1878
rcu_gp_fqs_loop kernel/rcu/tree.c:1996 [inline]
rcu_gp_kthread+0xd34/0x1980 kernel/rcu/tree.c:2169
kthread+0x38b/0x460 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x1b1/0x5410 kernel/locking/lockdep.c:4921
Code: 0f 87 ba 10 00 00 48 b9 ab aa aa aa aa aa aa aa 48 2d c0 5c db 8e 48 c1 f8 06 48 0f af c1 49 8d 8d f0 09 00 00 48 89 4c 24 28 <48> 89 44 24 10 8b 44 24 18 48 89 c6 48 8d 04 80 85 f6 4c 8d 24 c5
RSP: 0018:ffffc90000007b98 EFLAGS: 00000807
RAX: 0000000000000028 RBX: ffffffff8ab72040 RCX: ffff888010f3a5f0
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffffff8ab72048
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888010f39c00 R14: 0000000000000002 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c97a69ba0 CR3: 0000000027d68000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
rcu_read_lock include/linux/rcupdate.h:687 [inline]
advance_sched+0x3e5/0x920 net/sched/sch_taprio.c:763
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x2f9/0x920 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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:91 [inline]
RIP: 0010:lock_release+0x124/0x720 kernel/locking/lockdep.c:5638
Code: 85 e8 02 00 00 65 4c 8b 34 25 00 f0 01 00 49 8d be ec 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 69 05 00 00 45
RSP: 0018:ffffc90000cf7bd0 EFLAGS: 00000a07
RAX: dffffc0000000000 RBX: ffffffff8c7d10ac RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff88cb29a0 RDI: ffff888010f3a5ec
RBP: 1ffff9200019ef7c R08: 0000000000000000 R09: ffffffff8c7cdd97
R10: 0000000000000001 R11: 000000000007a088 R12: ffffffff8ab72040
R13: ffff888017578c00 R14: ffff888010f39c00 R15: 0000000000000000
rcu_lock_release include/linux/rcupdate.h:272 [inline]
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x5f0/0xcc0 net/batman-adv/network-coding.c:715
process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276
worker_thread+0x598/0x1040 kernel/workqueue.c:2422
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x55/0x180 mm/kasan/generic.c:189
Code: 86 05 01 00 00 49 83 e9 01 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 <49> 8d 5a 01 48 89 da 48 29 ea 48 83 fa 10 7e 63 41 89 eb 41 83 e3
RSP: 0018:ffffc90000007a20 EFLAGS: 00000086
RAX: fffffbfff1db6b3a RBX: 1ffff92000000f4e RCX: ffffffff8152660f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8edb59d0
RBP: fffffbfff1db6b3a R08: 0000000000000000 R09: ffffffff8edb59d7
R10: fffffbfff1db6b3a R11: 0000000000000000 R12: 0000000000000008
R13: ffff888010f3a668 R14: 00000000000009a1 R15: ffff888010f3a688
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c97a69ba0 CR3: 0000000027d68000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:199 [inline]
mark_lock+0xef/0x1840 kernel/locking/lockdep.c:4571
mark_usage kernel/locking/lockdep.c:4514 [inline]
__lock_acquire+0x8ce/0x5410 kernel/locking/lockdep.c:4969
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
advance_sched+0x49/0x920 net/sched/sch_taprio.c:710
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x2f9/0x920 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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:91 [inline]
RIP: 0010:lock_release+0x124/0x720 kernel/locking/lockdep.c:5638
Code: 85 e8 02 00 00 65 4c 8b 34 25 00 f0 01 00 49 8d be ec 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 69 05 00 00 45
RSP: 0018:ffffc90000cf7bd0 EFLAGS: 00000a07
RAX: dffffc0000000000 RBX: ffffffff8c7d10ac RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff88cb29a0 RDI: ffff888010f3a5ec
RBP: 1ffff9200019ef7c R08: 0000000000000000 R09: ffffffff8c7cdd97
R10: 0000000000000001 R11: 000000000007a088 R12: ffffffff8ab72040
R13: ffff888017578c00 R14: ffff888010f39c00 R15: 0000000000000000
rcu_lock_release include/linux/rcupdate.h:272 [inline]
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x5f0/0xcc0 net/batman-adv/network-coding.c:715
process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276
worker_thread+0x598/0x1040 kernel/workqueue.c:2422
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 1
CPU: 1 PID: 49 Comm: kworker/u4:2 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:105
nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:342
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:700 [inline]
rcu_pending kernel/rcu/tree.c:3922 [inline]
rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2641
update_process_times+0x13b/0x1c0 kernel/time/timer.c:1782
tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226
tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x18a/0xb00 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x2f9/0x920 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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:trace_lock_release include/trace/events/lock.h:58 [inline]
RIP: 0010:lock_release+0xa9/0x720 kernel/locking/lockdep.c:5636
Code: 07 0f 87 f6 04 00 00 89 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 90 dd 7c 8c e8 ef 47 53 00 48 0f a3 1d d7 fa 29 0b <0f> 82 60 04 00 00 48 c7 c3 ac 10 7d 8c 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000f2f158 EFLAGS: 00000247
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8152e2b1
RDX: fffffbfff18f9bb3 RSI: 0000000000000008 RDI: ffffffff8c7cdd90
RBP: 1ffff920001e5e2d R08: 0000000000000000 R09: ffffffff8c7cdd97
R10: fffffbfff18f9bb2 R11: 0000000000000000 R12: ffffffff8ab72040
R13: 0000000000000000 R14: ffff88801e3b0060 R15: ffffea00010e4380
__test_set_page_writeback+0x14f/0x9f0 mm/page-writeback.c:2820
set_page_writeback include/linux/page-flags.h:571 [inline]
ext4_bio_write_page+0x1bb/0x1ae0 fs/ext4/page-io.c:455
mpage_submit_page+0xe8/0x240 fs/ext4/inode.c:2100
mpage_map_and_submit_buffers fs/ext4/inode.c:2348 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2487 [inline]
ext4_writepages+0x1ada/0x2d10 fs/ext4/inode.c:2800
do_writepages+0xca/0x240 mm/page-writeback.c:2355
__writeback_single_inode+0xd6/0xaf0 fs/fs-writeback.c:1610
writeback_sb_inodes+0x466/0xc50 fs/fs-writeback.c:1875
__writeback_inodes_wb+0xb2/0x200 fs/fs-writeback.c:1944
wb_writeback+0x5c1/0x8d0 fs/fs-writeback.c:2050
wb_check_old_data_flush fs/fs-writeback.c:2152 [inline]
wb_do_writeback fs/fs-writeback.c:2205 [inline]
wb_workfn+0x6de/0xf30 fs/fs-writeback.c:2234
process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276
worker_thread+0x598/0x1040 kernel/workqueue.c:2422
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295