rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=96e4/1/0x4000000000000000 softirq=13623/13623 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5946 P5960
rcu: 	(detected by 1, t=10502 jiffies, g=5721, q=355 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5960 Comm: syz.0.30 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:native_apic_msr_eoi+0xf/0x20
Code: f8 c3 cc cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 <e9> 8c 24 00 0a cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90000007d60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90000007d98 RCX: 000000000000080b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff88804b023b0f R09: 1ffff11009604761
R10: dffffc0000000000 R11: ffffed1009604762 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055556cce0500(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c354921 CR3: 0000000122c18000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __sysvec_irq_work+0x11/0x3d0
 sysvec_irq_work+0x4f/0xc0
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:handle_softirqs+0x1b0/0x870
Code: 89 64 24 30 0f b7 db 48 c7 c7 00 ad 89 8b e8 a7 fe e8 09 65 66 c7 05 85 5b 1a 11 00 00 e8 58 00 42 00 fb 49 c7 c7 c0 c0 e0 8d <b8> ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c
RSP: 0018:ffffc90000007e40 EFLAGS: 00000286
RAX: 23873b3d0962a400 RBX: 0000000000000200 RCX: 23873b3d0962a400
RDX: 0000000000000002 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc90000007f50 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 000000000000000a
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:rcu_read_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 62 2c f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc9000479fc20 EFLAGS: 00000206
RAX: 23873b3d0962a400 RBX: 1ffff920008f3f8c RCX: 23873b3d0962a400
RDX: 0000000000000006 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc9000479fd10 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8e144560
 __rcu_read_unlock+0x84/0xe0
 dput+0x197/0x2b0
 __fput+0x68e/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd3aab8e9a9
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:00007ffe7288b288 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000bf59 RCX: 00007fd3aab8e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd3aadb7ba0 R08: 0000000000000001 R09: 000000057288b57f
R10: 00007fd3aaa00000 R11: 0000000000000246 R12: 00007fd3aadb5fac
R13: 00007fd3aadb5fa0 R14: ffffffffffffffff R15: 00007ffe7288b3a0
 </TASK>
task:syz.0.30        state:R  running task     stack:26360 pid:5960  tgid:5960  ppid:5841   task_flags:0x400040 flags:0x00004008
Call Trace:
 <TASK>
 </TASK>
task:syz.2.24        state:R  running task     stack:25096 pid:5946  tgid:5946  ppid:5838   task_flags:0x400040 flags:0x0000400a
Call Trace:
 <IRQ>
 sched_show_task+0x49d/0x630
 print_other_cpu_stall+0xfa6/0x1370
 rcu_sched_clock_irq+0x9d1/0x1090
 update_process_times+0x23c/0x2f0
 tick_nohz_handler+0x39a/0x520
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__kasan_check_read+0xa/0x20
Code: 31 ed eb cf cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 f6 48 8b 0c 24 <31> d2 e9 ef e4 ff ff 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000477fb18 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88801dc46dc8 RCX: ffffffff8b71360c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88801dc46dc8
RBP: ffffc9000477fc18 R08: ffff88801dc46dcb R09: 1ffff11003b88db9
R10: dffffc0000000000 R11: ffffed1003b88dba R12: 1ffff920008eff6c
R13: 0000000000000001 R14: ffffc9000477fb80 R15: 1ffff11003b88db9
 native_queued_spin_lock_slowpath+0xbc/0x8e0
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 lock_for_kill+0xdc/0x210
 dput+0x18a/0x2b0
 __fput+0x68e/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdcd38e9a9
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:00007ffc34f1f208 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007efdcd5b7ba0 RCX: 00007efdcd38e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007efdcd5b7ba0 R08: 0000000000000040 R09: 0000000434f1f4ff
R10: 00000000003ffd9c R11: 0000000000000246 R12: 000000000000c101
R13: 00007ffc34f1f300 R14: ffffffffffffffff R15: 00007ffc34f1f320
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g5721 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:27208 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5946 Comm: syz.2.24 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__kasan_check_read+0xa/0x20
Code: 31 ed eb cf cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 f6 48 8b 0c 24 <31> d2 e9 ef e4 ff ff 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000477fb18 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88801dc46dc8 RCX: ffffffff8b71360c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88801dc46dc8
RBP: ffffc9000477fc18 R08: ffff88801dc46dcb R09: 1ffff11003b88db9
R10: dffffc0000000000 R11: ffffed1003b88dba R12: 1ffff920008eff6c
R13: 0000000000000001 R14: ffffc9000477fb80 R15: 1ffff11003b88db9
FS:  00005555648ac500(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3ab958fc8 CR3: 00000000280ea000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 native_queued_spin_lock_slowpath+0xbc/0x8e0
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 lock_for_kill+0xdc/0x210
 dput+0x18a/0x2b0
 __fput+0x68e/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdcd38e9a9
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:00007ffc34f1f208 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007efdcd5b7ba0 RCX: 00007efdcd38e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007efdcd5b7ba0 R08: 0000000000000040 R09: 0000000434f1f4ff
R10: 00000000003ffd9c R11: 0000000000000246 R12: 000000000000c101
R13: 00007ffc34f1f300 R14: ffffffffffffffff R15: 00007ffc34f1f320
 </TASK>
