rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=f8e4/1/0x4000000000000000 softirq=116480/116481 fqs=41
rcu: 	(detected by 1, t=10506 jiffies, g=99297, q=2399 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 19767 Comm: syz.6.2441 Not tainted 6.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x17/0xb0 kernel/rcu/tree.c:737
Code: 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 78 dc 7e 7e e8 8b 2d 43 0a 89 c3 <83> f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 90 2a 2e
RSP: 0018:ffffc90000007ae0 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a9984
RDX: 0000000000000000 RSI: ffffffff8c5f9560 RDI: ffffffff8c5f9520
RBP: ffffc90000007c58 R08: ffffffff90196577 R09: 1ffffffff2032cae
R10: dffffc0000000000 R11: fffffbfff2032caf R12: 1ffff92000000f68
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88806fbf3360
FS:  0000555574cff500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f965efb4d58 CR3: 00000000621ae000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0xe3/0x550 kernel/locking/lockdep.c:5820
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0xa1e/0xca0 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59d/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+0x112/0x420 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sched_fork+0x190/0x470 kernel/sched/core.c:4499
Code: 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 e6 4d 97 00 48 c7 03 00 00 00 00 48 c7 c0 80 c5 7f 8e 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 26 02 00 00 8b 1d a2 54 11 0d 49 8d bd a0 01 00 00 48
RSP: 0018:ffffc900055b7960 EFLAGS: 00000212
RAX: 0000000000000004 RBX: ffff8880352f5b90 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffff8880352f5b88
RBP: dffffc0000000000 R08: ffff8880352f5bef R09: ffff8880352f5bc8
R10: dffffc0000000000 R11: ffffed1006a5eb7e R12: ffff8880352f5ad8
R13: ffff8880352f5a00 R14: 00000000003d0f00 R15: ffff8880352f5b80
 sched_fork+0x24/0x630 kernel/sched/core.c:4709
 copy_process+0x155a/0x3d50 kernel/fork.c:2365
 kernel_clone+0x226/0x8e0 kernel/fork.c:2807
 __do_sys_clone3 kernel/fork.c:3111 [inline]
 __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3090
 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: 0033:0x7f96611b4729
Code: 71 07 00 48 8d 3d 1c 71 07 00 e8 32 29 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007ffe745a6258 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f9661136b60 RCX: 00007f96611b4729
RDX: 00007f9661136b60 RSI: 0000000000000058 RDI: 00007ffe745a62a0
RBP: 00007f965efb46c0 R08: 00007f965efb46c0 R09: 00007ffe745a6387
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffe745a62a0 R15: 00007ffe745a6388
 </TASK>
rcu: rcu_preempt kthread starved for 10300 jiffies! g99297 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:24952 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 17100 Comm: udevd Not tainted 6.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f1/0x2c60 kernel/smp.c:884
Code: 00 00 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 56 e9 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 01 e5 0b 00 eb 38 <f3> 90 42 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8
RSP: 0018:ffffc90003b3fb40 EFLAGS: 00000293
RAX: ffffffff8193795b RBX: 1ffff110170c8c89 RCX: ffff8880475f5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003b3fd28 R08: ffffffff8193792a R09: 1ffffffff285431b
R10: dffffc0000000000 R11: fffffbfff285431c R12: dffffc0000000000
R13: ffff8880b8646448 R14: ffff8880b873fac0 R15: 0000000000000000
FS:  00007ff1781ebc80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f691d7ed000 CR3: 000000007b156000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 kill_bdev block/bdev.c:90 [inline]
 blkdev_flush_mapping+0xfe/0x270 block/bdev.c:671
 blkdev_put_whole block/bdev.c:678 [inline]
 bdev_release+0x460/0x700 block/bdev.c:1103
 blkdev_release+0x15/0x20 block/fops.c:635
 __fput+0x23e/0xa50 fs/file_table.c:450
 __do_sys_close fs/open.c:1554 [inline]
 __se_sys_close fs/open.c:1539 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1539
 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: 0033:0x7ff1783170a8
Code: 48 8b 05 83 9d 0d 00 64 c7 00 16 00 00 00 83 c8 ff 48 83 c4 20 5b c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 5b 48 8b 15 51 9d 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffef3613a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007ff1781ebae0 RCX: 00007ff1783170a8
RDX: 000055e2da8c1883 RSI: 00007ffef3613208 RDI: 0000000000000008
RBP: 000055e784f49150 R08: 0000000000000006 R09: 238bddfcdd4d2b5c
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000002
R13: 000055e784f4ab90 R14: 0000000000000008 R15: 000055e784f2d910
 </TASK>