rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=8834/1/0x4000000000000000 softirq=16399/16399 fqs=1
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6243/1:b..l
rcu: 	(detected by 0, t=10506 jiffies, g=9221, q=450 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6239 Comm: syz.0.96 Not tainted syzkaller #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:tracing_gen_ctx_irq_test+0x8b/0x160
Code: 81 cd 80 00 00 00 44 89 e6 81 e6 00 fe 00 00 44 0f 44 e8 31 ff e8 e5 c6 fb ff 65 4c 8b 3c 25 08 f0 a0 92 4c 89 fb 48 c1 eb 03 <48> b8 00 00 00 00 00 fc ff df 80 3c 03 00 74 08 4c 89 ff e8 9d e6
RSP: 0018:ffffc900001e02c8 EFLAGS: 00000802
RAX: ffffffff81c402fb RBX: 1ffff11005228398 RCX: 0000000000010000
RDX: ffff888029141cc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc900001e058f R09: 0000000000000000
R10: ffffc900001e0580 R11: fffff5200003c0b2 R12: 0000000080010002
R13: 0000000000000009 R14: 0000000000010000 R15: ffff888029141cc0
FS:  00007fb1743d36c0(0000) GS:ffff8881a3c11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47c3fd5f88 CR3: 000000002917c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 perf_trace_buf_update+0x9f/0x220
 perf_tp_event+0xf6/0x1380
 perf_trace_run_bpf_submit+0xee/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __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:__kmalloc_cache_noprof+0xa7/0x3d0
Code: 0f 85 78 01 00 00 0f 1f 44 00 00 48 c7 44 24 10 00 00 00 00 41 bc ff ff ff ff 65 48 8b 05 19 e0 87 10 49 8b 0f 4c 8b 74 08 08 <4c> 8b 2c 08 48 8b 5c 08 10 66 90 4d 85 ed 0f 84 9c 01 00 00 48 85
RSP: 0018:ffffc900060b7778 EFLAGS: 00000246
RAX: ffff8881a3c11000 RBX: 0000000000000000 RCX: ffffffff92a2d4b0
RDX: 0000000000000001 RSI: 0000000000000020 RDI: ffffffff8e25a5a0
RBP: 0000000000002800 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 00000000ffffffff
R13: 0000000000000000 R14: 00000000000e1c21 R15: ffff88801a441780
 kmem_cache_free+0x166/0x400
 __fput_deferred+0x227/0x390
 fput_close+0x119/0x200
 path_openat+0x313c/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb17358ec29
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:00007fb1743d3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb1737d5fa0 RCX: 00007fb17358ec29
RDX: 0000000000000000 RSI: 0000200000000740 RDI: 0000000000000003
RBP: 00007fb173611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb1737d6038 R14: 00007fb1737d5fa0 R15: 00007fffc4dffbf8
 </TASK>
task:syz.1.98        state:R  running task     stack:27864 pid:6243  tgid:6243  ppid:5848   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_is_held_type+0x137/0x190
Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 f9 d3 25 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0000:ffffc90004ff7938 EFLAGS: 00000206
RAX: ea562785b55ecd00 RBX: 0000000000000000 RCX: ea562785b55ecd00
RDX: ffff888108ad1cc0 RSI: ffffffff8dbaa624 RDI: ffffffff8be34480
RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff84b25f5d
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 0000000000000246
R13: ffff888108ad1cc0 R14: ffffffff8e1715e8 R15: 0000000000000002
 blkcg_css+0xa5/0x1d0
 blk_cgroup_congested+0xbc/0x210
 __folio_throttle_swaprate+0x80/0x1c0
 folio_prealloc+0x10d/0x180
 do_wp_page+0x1231/0x5800
 __handle_mm_fault+0x1033/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f47c3c56116
RSP: 002b:00007ffe5b004090 EFLAGS: 00010246
RAX: 00007f47c27f9000 RBX: 00007f47c3fd5f40 RCX: 0000000000012cc8
RDX: 0000000000000256 RSI: 00007ffe5b004080 RDI: 00007f47c3fd5f40
RBP: 0000000000000000 R08: 0000000023aaec44 R09: 7fffffffffffffff
R10: 3fffffffffffffff R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000012ef4 R15: 00007ffe5b004350
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g9221 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:26792 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6046 Comm: syz.0.40 Not tainted syzkaller #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:smp_call_function_many_cond+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 b6 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 45 5f
RSP: 0018:ffffc900043bd120 EFLAGS: 00000293
RAX: ffffffff81b4665b RBX: 1ffff11026cc7f61 RCX: ffff888020460000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900043bd2a0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: ffff88813663fb08
R13: dffffc0000000000 R14: ffff88804b03b1c0 R15: 0000000000000001
FS:  00007fb1743d36c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555576f71808 CR3: 0000000114ca6000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 arch_tlbbatch_flush+0x324/0x570
 try_to_unmap_flush+0x51/0xd0
 shrink_folio_list+0x44d5/0x4cd0
 evict_folios+0x47f2/0x58b0
 try_to_shrink_lruvec+0x8a3/0xb50
 shrink_lruvec+0x49c/0x2980
 shrink_node+0xa4e/0x3760
 do_try_to_free_pages+0x668/0x1960
 try_to_free_mem_cgroup_pages+0x2fa/0x7e0
 try_charge_memcg+0xa40/0x1290
 charge_memcg+0x9f/0x180
 __mem_cgroup_charge+0x25/0x80
 shmem_alloc_and_add_folio+0x7c1/0xf60
 shmem_get_folio_gfp+0x59d/0x1660
 shmem_write_begin+0xf7/0x2b0
 generic_perform_write+0x2c5/0x900
 shmem_file_write_iter+0xf8/0x120
 __kernel_write_iter+0x428/0x910
 dump_user_range+0x8a0/0xc90
 elf_core_dump+0x337b/0x3990
 coredump_write+0x1169/0x1900
 vfs_coredump+0x1daa/0x2a50
 get_signal+0x1109/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 irqentry_exit_to_user_mode+0x81/0x120
 exc_general_protection+0x171/0x200
 asm_exc_general_protection+0x26/0x30
RIP: 0033:0x7fb17358ec31
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000200000000330 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fb1737d5fa0 RCX: 00007fb17358ec29
RDX: 0000200000000080 RSI: 0000200000000330 RDI: 0000000000000000
RBP: 00007fb173611e41 R08: 0000200000000380 R09: 0000200000000380
R10: 0000200000000340 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb1737d6038 R14: 00007fb1737d5fa0 R15: 00007fffc4dffbf8
 </TASK>
