rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8795/1:b..l P5823/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=20037, q=484 ncpus=2)
task:syz-executor state:R running task stack:22672 pid:5823 tgid:5823 ppid:5810 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6935
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1200 [inline]
copy_pmd_range mm/memory.c:1261 [inline]
copy_pud_range mm/memory.c:1298 [inline]
copy_p4d_range mm/memory.c:1322 [inline]
copy_page_range+0x1e27/0x5790 mm/memory.c:1420
dup_mmap kernel/fork.c:748 [inline]
dup_mm kernel/fork.c:1691 [inline]
copy_mm kernel/fork.c:1743 [inline]
copy_process+0x7ef3/0x8e50 kernel/fork.c:2394
kernel_clone+0xfd/0x960 kernel/fork.c:2806
__do_sys_clone+0xba/0x100 kernel/fork.c:2949
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf4257c593
RSP: 002b:00007ffe69290c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcf4257c593
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055556a7467d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000001f570 R14: 00007ffe69290e20 R15: 00000000000000eb
task:syz.2.1171 state:R running task stack:27616 pid:8795 tgid:8795 ppid:5817 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6935
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1705 [inline]
zap_pmd_range mm/memory.c:1753 [inline]
zap_pud_range mm/memory.c:1782 [inline]
zap_p4d_range mm/memory.c:1803 [inline]
unmap_page_range+0xb87/0x3d10 mm/memory.c:1824
unmap_single_vma+0x194/0x2b0 mm/memory.c:1870
unmap_vmas+0x22f/0x490 mm/memory.c:1914
exit_mmap+0x1c6/0xb20 mm/mmap.c:1672
__mmput+0x12a/0x4c0 kernel/fork.c:1348
mmput+0x62/0x70 kernel/fork.c:1370
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2d70 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1096
x64_sys_call+0x151f/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa698b85d29
RSP: 002b:00007ffe682cbb68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa698b85d29
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe682cbbbc R08: 00007ffe682cbc4f R09: 000000000001f559
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000001f559 R14: 00007ffe682cbc10 R15: 00007ffe682cbc10
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g20037 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=7677
rcu: rcu_preempt kthread starved for 10502 jiffies! g20037 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27600 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5826 Comm: syz-executor Not tainted 6.13.0-rc7-syzkaller-00102-gce69b4019001 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:mark_lock+0xce/0xc60 kernel/locking/lockdep.c:4727
Code: 44 89 f1 41 d3 e5 4d 63 ed 48 89 df e8 0b 6a ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 78 60 48 89 f9 48 c1 e9 03 80 3c 11 00 <0f> 85 a7 09 00 00 4c 89 ee 48 23 70 60 ba 01 00 00 00 0f 84 1a 01
RSP: 0018:ffffc90000a182c0 EFLAGS: 00000046
RAX: ffffffff96e540e0 RBX: ffff888030938b30 RCX: 1ffffffff2dca828
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff96e54140
RBP: ffffc90000a18400 R08: 0000000000000000 R09: fffffbfff2dca798
R10: ffffffff96e53cc7 R11: 0000000000000002 R12: ffff888030938000
R13: 0000000000000001 R14: 0000000000000000 R15: 1ffff9200014305e
FS: 00005555952b2500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f216ff8 CR3: 000000007b348000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4635 [inline]
__lock_acquire+0x1390/0x3c40 kernel/locking/lockdep.c:5180
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
debug_object_deactivate+0x13b/0x370 lib/debugobjects.c:873
debug_hrtimer_deactivate kernel/time/hrtimer.c:433 [inline]
debug_deactivate kernel/time/hrtimer.c:475 [inline]
__run_hrtimer kernel/time/hrtimer.c:1707 [inline]
__hrtimer_run_queues+0x47c/0xae0 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x36/0x20c0 arch/x86/kernel/unwind_orc.c:471
Code: ff df 48 89 fa 41 57 48 c1 ea 03 41 56 41 55 49 89 fd 41 54 55 53 48 83 ec 38 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 48 0a 00 00 <41> 8b 5d 00 85 db 75 15 31 c0 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000a189d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90000a18a48 RCX: 0000000000000000
RDX: 1ffff92000143149 RSI: ffffffff8b400130 RDI: ffffc90000a18a48
RBP: ffffc90000a18ad8 R08: ffffc90000a18a7c R09: ffffffff91a3e794
R10: ffffc90000a18a48 R11: 00000000000a29b4 R12: ffffffff8185e450
R13: ffffc90000a18a48 R14: 0000000000000000 R15: ffff888030938000
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free_after_rcu_debug+0x115/0x340 mm/slub.c:4663
rcu_do_batch kernel/rcu/tree.c:2567 [inline]
rcu_core+0x79d/0x14d0 kernel/rcu/tree.c:2823
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5243
Code: a9 0a 00 00 44 8b 0d b3 9d f6 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 e9 e5 38 00 fb 65 48 8b 1d e0 f9 9a 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90003cafa48 EFLAGS: 00000206
RAX: 0000000000154b95 RBX: ffff888030938000 RCX: 1ffffffff20be0c9
RDX: 0000000000000000 RSI: ffffffff8b6cd9e0 RDI: ffffffff8bd1ef20
RBP: ffffc90003cafa90 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff905f4997 R11: 0000000000000000 R12: ffff8880b873f9e0
R13: ffff88807adda440 R14: ffff888028f09d40 R15: ffff8880b873ebc0
context_switch kernel/sched/core.c:5372 [inline]
__schedule+0xe60/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
do_nanosleep+0x216/0x510 kernel/time/hrtimer.c:2079
hrtimer_nanosleep+0x158/0x380 kernel/time/hrtimer.c:2126
common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1356
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1402 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1379 [inline]
__x64_sys_clock_nanosleep+0x344/0x4a0 kernel/time/posix-timers.c:1379
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6bb99b85e5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffd07fc7d50 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000279 RCX: 00007f6bb99b85e5
RDX: 00007ffd07fc7d90 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd07fc7dec R08: 0000000000000000 R09: 00007f6bba721000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000001f547 R14: 00007ffd07fc7e40 R15: 0000000000000bb8