rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8440/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=23777, q=172 ncpus=2)
task:syz.3.615 state:R running task stack:23728 pid:8440 tgid:8439 ppid:5833 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7086
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:debug_lockdep_rcu_enabled+0xd/0x40 kernel/rcu/update.c:320
Code: f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 83 3d 27 98 2c 04 00 <74> 1e 83 3d ca c9 2c 04 00 74 15 65 48 8b 0c 25 c0 d4 03 00 31 c0
RSP: 0018:ffffc9001c2a7698 EFLAGS: 00000202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888032b88ae8
RDX: dffffc0000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c5fac60
RBP: ffffc9001c2a7750 R08: ffffffff942c3847 R09: 1ffffffff2858708
R10: dffffc0000000000 R11: fffffbfff2858709 R12: 1ffff92003854ed8
R13: ffff888033bac808 R14: dffffc0000000000 R15: ffffc9001c2a77e0
rcu_read_lock include/linux/rcupdate.h:850 [inline]
___pte_offset_map+0xa7/0x380 mm/pgtable-generic.c:287
__pte_offset_map include/linux/mm.h:3032 [inline]
__pte_offset_map_lock+0xc7/0x300 mm/pgtable-generic.c:398
pte_offset_map_lock include/linux/mm.h:3047 [inline]
follow_page_pte+0x121/0x1460 mm/gup.c:855
follow_pmd_mask mm/gup.c:978 [inline]
follow_pud_mask mm/gup.c:1030 [inline]
follow_p4d_mask mm/gup.c:1047 [inline]
follow_page_mask mm/gup.c:1090 [inline]
__get_user_pages+0xb33/0x4140 mm/gup.c:1489
populate_vma_page_range+0x264/0x330 mm/gup.c:1929
__mm_populate+0x27a/0x460 mm/gup.c:2032
mm_populate include/linux/mm.h:3386 [inline]
vm_mmap_pgoff+0x303/0x430 mm/util.c:580
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95ef98cda9
RSP: 002b:00007f95f071a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f95efba5fa0 RCX: 00007f95ef98cda9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f95efa0e2a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f95efba5fa0 R15: 00007fff70f39178
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g23777 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=16526
rcu: rcu_preempt kthread starved for 10502 jiffies! g23777 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:25624 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
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: 8413 Comm: syz.5.609 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline]
RIP: 0010:lock_release+0x625/0xa30 kernel/locking/lockdep.c:5875
Code: 01 0f 85 9a 00 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 f8 79 88 00 48 c7 84 24 90 00 00 00 00 00 00 00 9c <8f> 84 24 90 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 e5 78 88 00
RSP: 0018:ffffc90000a18b58 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff9200014317e RCX: ffffc90000a18b03
RDX: 0000000000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c5fac60
RBP: ffffc90000a18c90 R08: ffffffff901a1777 R09: 1ffffffff20342ee
R10: dffffc0000000000 R11: fffffbfff20342ef R12: 1ffff92000143178
R13: 0000000000000046 R14: ffffc90000a18bf0 R15: dffffc0000000000
FS: 00007f8478c056c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2de2d5 CR3: 0000000066a16000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
__run_hrtimer kernel/time/hrtimer.c:1734 [inline]
__hrtimer_run_queues+0x477/0xd30 kernel/time/hrtimer.c:1802
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1864
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:copy_msghdr_from_user+0xd3/0x680 net/socket.c:2509
Code: e8 32 c4 35 fb 48 89 c3 31 ff 48 89 c6 e8 45 81 14 f8 48 85 db 74 62 e8 5b 7c 14 f8 bb f2 ff ff ff 48 c7 44 24 40 0e 36 e0 45 <48> b8 00 00 00 00 00 fc ff df 48 8b 4c 24 38 c7 04 08 00 00 00 00
RSP: 0018:ffffc9001c177960 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9001c177d30 RSI: 0000000000000000 RDI: ffffc9001c177d28
RBP: ffffc9001c177a70 R08: ffffffff84df2f88 R09: ffffc9001c177d10
R10: ffffc9001c177d50 R11: fffff5200382efac R12: 1ffff9200382ef3b
R13: 0000000000000000 R14: ffffc9001c1779d8 R15: 1ffff9200382ef00
recvmsg_copy_msghdr net/socket.c:2754 [inline]
___sys_recvmsg net/socket.c:2826 [inline]
do_recvmmsg+0x3bd/0xab0 net/socket.c:2925
__sys_recvmmsg net/socket.c:2999 [inline]
__do_sys_recvmmsg net/socket.c:3022 [inline]
__se_sys_recvmmsg net/socket.c:3015 [inline]
__x64_sys_recvmmsg+0x199/0x250 net/socket.c:3015
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8477d8cda9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8478c05038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f8477fa6080 RCX: 00007f8477d8cda9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007f8477e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8477fa6080 R15: 00007ffc61e0e7e8