rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=9a44/1/0x4000000000000000 softirq=86752/86757 fqs=1
rcu: (detected by 0, t=10505 jiffies, g=82665, q=1333 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 17682 Comm: syz.5.3001 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
RIP: 0010:__remove_hrtimer+0x366/0x440 kernel/time/hrtimer.c:1145
Code: fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 d9 00 00 00 41 c6 45 4e 01 e9 65 fd ff ff e8 4a 67 14 00 <49> 8d 7d 18 be ff ff ff ff e8 7c 6b c4 09 31 ff 41 89 c6 89 c6 e8
RSP: 0018:ffffc90000a08e50 EFLAGS: 00000046
RAX: 0000000080010002 RBX: ffff88802c315300 RCX: ffffffff81f57271
RDX: ffff8880523fca80 RSI: ffffffff81f57556 RDI: ffff8880523fca80
RBP: ffff8880b8528640 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b8528400 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f05f13c26c0(0000) GS:ffff888123ee7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05f137fff8 CR3: 000000002bf84000 CR4: 00000000003526f0
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:2012 [inline]
__hrtimer_run_queues+0x352/0x9c0 kernel/time/hrtimer.c:2096
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:198
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 56 a0 28 f6 48 89 df e8 de ef 28 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 a5 ff 17 f6 65 8b 05 ee b8 a6 08 85 c0 74 16 5b
RSP: 0018:ffffc9000313fa50 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff9b8b5da8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8e1a4788 RDI: ffffffff8c401280
RBP: 0000000000000282 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000200 R14: 0000000000000282 R15: 00000000000001b3
spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
avc_reclaim_node security/selinux/avc.c:488 [inline]
avc_alloc_node+0x3f5/0x670 security/selinux/avc.c:507
avc_insert security/selinux/avc.c:618 [inline]
avc_compute_av+0x101/0x820 security/selinux/avc.c:993
avc_perm_nonode+0xb1/0x180 security/selinux/avc.c:1117
avc_has_perm_noaudit+0x2d4/0x3b0 security/selinux/avc.c:1160
cred_has_capability.isra.0+0x171/0x300 security/selinux/hooks.c:1666
security_capable+0x10d/0x260 security/security.c:660
ns_capable_common kernel/capability.c:342 [inline]
ns_capable+0x71/0xf0 kernel/capability.c:363
xsk_create+0x52/0x760 net/xdp/xsk.c:1976
__sock_create+0x339/0x860 net/socket.c:1651
sock_create net/socket.c:1709 [inline]
__sys_socket_create net/socket.c:1746 [inline]
__sys_socket+0x14d/0x260 net/socket.c:1793
__do_sys_socket net/socket.c:1807 [inline]
__se_sys_socket net/socket.c:1805 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1805
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05f059de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f05f13c2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f05f0825fa0 RCX: 00007f05f059de99
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 000000000000002c
RBP: 00007f05f0633eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05f0826038 R14: 00007f05f0825fa0 R15: 00007ffc3ecdec08
rcu: rcu_preempt kthread starved for 10501 jiffies! g82665 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:27528 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6730 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7326
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2325
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 17683 Comm: syz.5.3001 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x39/0x70 kernel/kcov.c:217
Code: 65 48 8b 15 61 b3 59 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 e9 91 44 b3 09 8b 82 24 17 00 00 85 c0 74 f1 <8b> 82 f8 16 00 00 83 f8 02 75 e6 48 8b 8a 00 17 00 00 8b 92 fc 16
RSP: 0018:ffffc90003c371a0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff81fd46fd
RDX: ffff88805edb2540 RSI: ffffffff81fd46d7 RDI: ffff88805edb2540
RBP: ffff8880b8541240 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10170a8249 R14: 0000000000000001 R15: ffff8880b843c880
FS: 00007f05f13a16c0(0000) GS:ffff888123de7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000000c0 CR3: 000000002bf84000 CR4: 00000000003526f0
Call Trace:
native_pause 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:342 [inline]
smp_call_function_many_cond+0x587/0x16c0 kernel/smp.c:892
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057
__flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
flush_tlb_mm_range+0x45f/0x16f0 arch/x86/mm/tlb.c:1451
tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:499 [inline]
tlb_flush_mmu mm/mmu_gather.c:423 [inline]
tlb_finish_mmu+0x3fe/0x810 mm/mmu_gather.c:549
unmap_region+0x2d9/0x3b0 mm/vma.c:491
vms_clear_ptes mm/vma.c:1303 [inline]
vms_clean_up_area mm/vma.c:1315 [inline]
__mmap_setup mm/vma.c:2476 [inline]
__mmap_region+0x1aec/0x2db0 mm/vma.c:2756
mmap_region+0x35d/0x620 mm/vma.c:2860
do_mmap+0xc63/0x12f0 mm/mmap.c:560
vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
ksys_mmap_pgoff+0x285/0x610 mm/mmap.c:606
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05f059de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f05f13a1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f05f0826090 RCX: 00007f05f059de99
RDX: 0000000002000002 RSI: 0000000000ff5000 RDI: 0000200000000000
RBP: 00007f05f0633eaf R08: ffffffffffffffff R09: 0000000000000000
R10: 000200000005c832 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05f0826128 R14: 00007f05f0826090 R15: 00007ffc3ecdec08