rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (1 GPs behind) idle=84dc/1/0x4000000000000000 softirq=58374/58375 fqs=8 (t=10501 jiffies g=94177 q=11 ncpus=2) rcu: rcu_preempt kthread starved for 10486 jiffies! g94177 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:25528 pid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x142d/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:kasan_mem_to_shadow include/linux/kasan.h:59 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x33/0x290 mm/kasan/generic.c:189 Code: 85 f6 0f 84 9a 01 00 00 48 89 fd 48 01 f5 0f 82 5a 02 00 00 48 89 fd 48 c1 ed 2f 81 fd ff ff 01 00 0f 82 47 02 00 00 48 89 fb <48> c1 eb 03 49 b8 00 00 00 00 00 fc ff df 4e 8d 0c 03 4c 8d 54 37 RSP: 0018:ffffc90000157b70 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88813fee5940 RCX: ffffffff8a93a8f6 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88813fee5940 RBP: 000000000001ffff R08: dffffc0000000000 R09: ffffed1017307541 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88813fee5940 R13: 1ffff9200002af78 R14: ffff88813fee6bb8 R15: dffffc0000000000 instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] test_ti_thread_flag include/linux/thread_info.h:118 [inline] need_resched include/linux/sched.h:2231 [inline] schedule+0xd6/0x180 kernel/sched/core.c:6636 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17334 Comm: syz-executor.2 Not tainted 6.1.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__rq_lockp kernel/sched/sched.h:1229 [inline] RIP: 0010:rq_unpin_lock kernel/sched/sched.h:1585 [inline] RIP: 0010:balance_rt+0x158/0x4a0 kernel/sched/rt.c:1710 Code: 03 0f b6 04 28 84 c0 0f 85 68 02 00 00 41 3b 1f 0f 8e 01 ff ff ff 49 8d 9c 24 58 0d 00 00 48 89 d8 48 c1 e8 03 48 89 44 24 08 <0f> b6 04 28 84 c0 0f 85 5d 02 00 00 48 89 5c 24 10 83 3b 00 4c 89 RSP: 0018:ffffc900033cf868 EFLAGS: 00000806 RAX: 1ffff110173076eb RBX: ffff8880b983b758 RCX: dffffc0000000000 RDX: ffffc900033cfa40 RSI: ffff8880528e8000 RDI: ffff8880b983aa00 RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed10024c5837 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b983aa00 R13: ffffc900033cfa40 R14: ffffc900033cfa40 R15: ffff8880528e806c FS: 00007f7ef1d756c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe2b40cff8 CR3: 000000005c084000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000d8 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: put_prev_task_balance+0x8e/0x140 kernel/sched/core.c:5842 __pick_next_task kernel/sched/core.c:5882 [inline] pick_next_task kernel/sched/core.c:5943 [inline] __schedule+0x7d6/0x4550 kernel/sched/core.c:6522 schedule+0xbf/0x180 kernel/sched/core.c:6634 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: 0033:0x7f7ef107cea9 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:00007f7ef1d75178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f7ef11b3f88 RCX: 00007f7ef107cea9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7ef11b3f88 RBP: 00007f7ef11b3f80 R08: 00007f7ef1d756c0 R09: 00007f7ef1d756c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ef11b3f8c R13: 000000000000000b R14: 00007ffe2b40d270 R15: 00007ffe2b40d358 CPU: 1 PID: 17322 Comm: syz-executor.3 Not tainted 6.1.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5124 Code: 2e 0b 00 48 83 c4 08 4c 89 f7 e8 98 30 00 00 0f 1f 44 00 00 4c 89 f7 e8 0b 32 36 09 e8 06 1e 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:ffffc90002e3f728 EFLAGS: 00000282 RAX: 3ffcf2da6b01f600 RBX: ffff8880461dd974 RCX: ffffffff91c95103 RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: ffff8880461dd178 RBP: ffffc90002e3f770 R08: dffffc0000000000 R09: ffffed1017327541 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880461dbb80 R13: 1ffff110173276eb R14: ffff8880b993aa00 R15: ffff8880b993b758 FS: 0000555555e25480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007eff6fdd9d58 CR3: 0000000060ea8000 CR4: 00000000003506e0 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:preempt_count_add+0x0/0x180 kernel/sched/core.c:5698 Code: 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 7c 97 48 8b 3c 24 e8 53 b2 83 00 eb 8c e9 f2 fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 <41> 57 41 56 53 89 fb 48 c7 c0 60 51 c9 91 48 c1 e8 03 49 bf 00 00 RSP: 0018:ffffc90002e3fac8 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 1ffff11008c3b770 RCX: ffffffff8a93a8f6 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 RBP: 1ffff11008c3ba5d R08: dffffc0000000000 R09: ffffed1008c3b771 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880461dbb80 R13: ffffc90002e3fc68 R14: ffff8880461dcdf8 R15: dffffc0000000000 schedule+0xb8/0x180 kernel/sched/core.c:6633 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: 0033:0x7eff6f07cea9 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:00007ffd43399408 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00000000000e36b7 RCX: 00007eff6f07cea9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007eff6f1b412c RBP: 00000000000e36e9 R08: 0000000000000010 R09: 0000001000000000 R10: 00007ffd433994f0 R11: 0000000000000246 R12: 00007ffd433994f0 R13: 00007eff6f1b412c R14: 0000000000000032 R15: 00007ffd43399510