TCP: request_sock_subflow_v4: Possible SYN flooding on port [::]:20002. Sending cookies.
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=5a94/1/0x4000000000000000 softirq=287988/287992 fqs=1
rcu: (detected by 1, t=10505 jiffies, g=209101, q=594 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12202 Comm: syz.1.10914 Not tainted 6.13.0-rc3-next-20241218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xb8/0xa30 kernel/locking/lockdep.c:5860
Code: 08 0f 83 fe 05 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 f0 76 1a 90 be 08 00 00 00 e8 70 e5 8a 00 48 0f a3 1d 98 b4 7f 0e <73> 16 e8 f1 39 0a 00 84 c0 75 0d 80 3d cf d2 69 0e 00 0f 84 fc 05
RSP: 0018:ffffc90000007a00 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff819ac250
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901a76f0
RBP: ffffc90000007b30 R08: ffffffff901a76f7 R09: 1ffffffff2034ede
R10: dffffc0000000000 R11: fffffbfff2034edf R12: 1ffff92000000f4c
R13: ffffffff84ec0337 R14: ffffc90000007b60 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d07f7 CR3: 0000000048c50000 CR4: 00000000003526f0
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
debug_object_activate+0x3f7/0x580 lib/debugobjects.c:836
debug_hrtimer_activate kernel/time/hrtimer.c:428 [inline]
debug_activate kernel/time/hrtimer.c:469 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1076
__run_hrtimer kernel/time/hrtimer.c:1756 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
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:gup_fast_fallback+0x2118/0x29c0 mm/gup.c:3408
Code: e8 4d 37 b5 ff 4c 8b 74 24 58 48 83 bc 24 f8 00 00 00 00 75 07 e8 38 37 b5 ff eb 06 e8 31 37 b5 ff fb 83 bc 24 94 00 00 00 00 <48> 8b 84 24 88 00 00 00 75 0a e8 19 37 b5 ff e9 93 00 00 00 48 8b
RSP: 0018:ffffc9001bb4f200 EFLAGS: 00000246
RAX: ffffffff8209f91f RBX: 0000000000000000 RCX: ffff888030313c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9001bb4f510 R08: ffffffff8209f8f5 R09: 1ffffffff2034ede
R10: dffffc0000000000 R11: fffffbfff2034edf R12: 00007f619d555000
R13: ffffc9001bb4f3e0 R14: 0000000000000001 R15: dffffc0000000000
get_user_pages_fast+0xcc/0x160 mm/gup.c:3508
get_futex_key+0x20b/0xf40 kernel/futex/core.c:277
futex_wake+0x12a/0x5c0 kernel/futex/waitwake.c:166
do_futex+0x392/0x560 kernel/futex/syscalls.c:107
mm_release+0x193/0x430 kernel/fork.c:1591
exit_mm+0xb0/0x310 kernel/exit.c:543
do_exit+0x9b2/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
get_signal+0x16b2/0x1750 kernel/signal.c:3017
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f619c785d29
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:00007f619d5540e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f619c975fa8 RCX: 00007f619c785d29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f619c975fa8
RBP: 00007f619c975fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f619c975fac
R13: 0000000000000000 R14: 00007ffce78eef20 R15: 00007ffce78ef008
rcu: rcu_preempt kthread starved for 10500 jiffies! g209101 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:25752 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
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:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 8440 Comm: syz-executor Not tainted 6.13.0-rc3-next-20241218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1ba4/0x2d30 kernel/smp.c:885
Code: 03 84 c0 75 7e 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 60 e9 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 10 e5 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc9000c187560 EFLAGS: 00000293
RAX: ffffffff81b34b65 RBX: 1ffff110170c8c99 RCX: ffff88805bcb9e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000c187760 R08: ffffffff81b34b30 R09: 1ffffffff285a30f
R10: dffffc0000000000 R11: fffffbfff285a310 R12: ffff8880b873fb88
R13: ffff8880b86464c8 R14: ffff8880b873fb80 R15: 0000000000000000
FS: 00005555832c0500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea4f2a56c0 CR3: 00000000364fc000 CR4: 00000000003526f0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:966 [inline]
flush_tlb_mm_range+0x42d/0x710 arch/x86/mm/tlb.c:1054
dup_mmap kernel/fork.c:721 [inline]
dup_mm kernel/fork.c:1643 [inline]
copy_mm+0x19dc/0x22b0 kernel/fork.c:1695
copy_process+0x1845/0x3d80 kernel/fork.c:2346
kernel_clone+0x226/0x8e0 kernel/fork.c:2758
__do_sys_clone kernel/fork.c:2901 [inline]
__se_sys_clone kernel/fork.c:2885 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2885
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: 0033:0x7fea4e57c593
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffded289048 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fea4e57c593
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555832c07d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000303886 R14: 00007ffded2891d0 R15: 00000000000000f2