rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=5e14/1/0x4000000000000000 softirq=32999/33000 fqs=320
(t=10501 jiffies g=48473 q=148 ncpus=2)
rcu: rcu_preempt kthread starved for 8937 jiffies! g48473 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:26744 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9850 Comm: syz-executor.1 Not tainted 6.1.92-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_acquire+0x171/0x5a0 kernel/locking/lockdep.c:5658
Code: d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 ea 02 00 00 83 3b 00 0f 85 5c 01 00 00 4c 8d bc 24 80 00 00 00 4c 89 fb 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 ff e8 d0 aa 77 00 48 c7 84 24 80 00 00
RSP: 0018:ffffc90004dd7aa0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: 1ffff920009baf64 RCX: ffffffff816a61eb
RDX: 0000000000000000 RSI: ffffffff8b3d45c0 RDI: ffffffff8b3d4580
RBP: ffffc90004dd7bf0 R08: dffffc0000000000 R09: fffffbfff1ce712e
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920009baf5c
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90004dd7b20
FS: 00007fc62079f6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc62079ef80 CR3: 000000005ebdb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__might_fault+0xbd/0x110 mm/memory.c:5835
_copy_from_user+0x26/0x170 lib/usercopy.c:14
copy_from_user include/linux/uaccess.h:161 [inline]
restore_sigcontext+0xce/0x700 arch/x86/kernel/signal.c:92
__do_sys_rt_sigreturn+0x190/0x250 arch/x86/kernel/signal.c:675
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc61fa403b9
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fc62079ebc0 EFLAGS: 00000202 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007fc61fbb4058 RCX: 00007fc61fa403b9
RDX: 00007fc62079ebc0 RSI: 00007fc62079ecf0 RDI: 0000000000000021
RBP: 00007fc61fbb4050 R08: 00007fc62079f6c0 R09: 00007fc62079f6c0
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fc61fbb405c
R13: 000000000000006e R14: 00007fff569a2370 R15: 00007fff569a2458
CPU: 0 PID: 9845 Comm: syz-executor.1 Not tainted 6.1.92-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5124
Code: 37 0b 00 48 83 c4 08 4c 89 f7 e8 98 30 00 00 e9 8f 04 00 00 4c 89 f7 e8 7b 20 36 09 e8 36 26 32 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc90004b47748 EFLAGS: 00000286
RAX: 2299efacf247f200 RBX: ffff8880b983b748 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec01c0 RDI: ffff888020a06f38
RBP: ffffc90004b47790 R08: dffffc0000000000 R09: ffffed1017307541
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888020a05940
R13: 1ffff110173076eb R14: ffff8880b983aa00 R15: ffff8880b983b758
FS: 00007fc6207c06c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f128786df00 CR3: 000000005ebdb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1435/0x4550 kernel/sched/core.c:6558
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:118 [inline]
RIP: 0010:need_resched include/linux/sched.h:2231 [inline]
RIP: 0010:schedule+0xdb/0x180 kernel/sched/core.c:6636
Code: 00 00 e8 48 c9 ca f6 31 ff e8 f1 b9 ff ff bf 01 00 00 00 e8 b7 ca ca f6 4c 89 e7 be 08 00 00 00 e8 3a 85 4e f7 42 80 3c 3b 00 <74> c7 4c 89 e7 e8 9b 83 4e f7 eb bd 4d 89 e6 49 83 c6 2c 4c 89 f0
RSP: 0018:ffffc90004b47ad0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff11004140b28 RCX: ffffffff8a938926
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888020a05940
RBP: 1ffff11004140e15 R08: dffffc0000000000 R09: ffffed1004140b29
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888020a05940
R13: ffffc90004b47c68 R14: ffff888020a06bb8 R15: dffffc0000000000
futex_wait_queue+0x149/0x1d0 kernel/futex/waitwake.c:355
futex_wait+0x203/0x5c0 kernel/futex/waitwake.c:656
do_futex+0x3b5/0x490 kernel/futex/syscalls.c:106
__do_sys_futex kernel/futex/syscalls.c:183 [inline]
__se_sys_futex+0x3d7/0x460 kernel/futex/syscalls.c:164
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc61fa7cf69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc6207c0178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fc61fbb3f88 RCX: 00007fc61fa7cf69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc61fbb3f88
RBP: 00007fc61fbb3f80 R08: 00007fc6207c06c0 R09: 00007fc6207c06c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc61fbb3f8c
R13: 000000000000000b R14: 00007fff569a2370 R15: 00007fff569a2458