rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=a7ac/1/0x4000000000000000 softirq=14461/14461 fqs=4649
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   991598          0            0
rcu: 	cputime:    24229      28260           88   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=7269 q=2721 ncpus=2)
CPU: 0 UID: 0 PID: 6094 Comm: syz.2.89 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:unwind_get_return_address+0x0/0x90
Code: f7 49 89 f7 e8 61 98 b0 00 4c 89 f7 4c 89 fe e9 29 ff ff ff e8 11 df fb 09 90 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 48 89 fb 49 be 00 00 00 00 00 fc ff df
RSP: 0018:ffffc900000077a0 EFLAGS: 00000202
RAX: 0000000090357501 RBX: ffffc90000007860 RCX: d37d7fa01e9f3b00
RDX: 0000000000000000 RSI: ffffffff8d9986f9 RDI: ffffc900000077a8
RBP: ffffc90000007830 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff8881088e3980
R13: 0000000000000000 R14: ffffffff81acf520 R15: ffffc900000077a8
FS:  00007f73643f66c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000018c0 CR3: 00000000254a4000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 rcu_core+0xca8/0x1710
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kmem_cache_alloc_noprof+0xef/0x3c0
Code: 00 00 41 83 fc ff 74 1a 48 8b 03 48 83 f8 ff 0f 84 d3 02 00 00 48 c1 e8 3a 41 39 c4 0f 85 5d 01 00 00 41 8b 46 28 4a 8b 1c 28 <49> 8d 4f 08 49 8b 36 4c 89 e8 4c 89 fa 65 48 0f c7 0e 74 5c eb 95
RSP: 0018:ffffc900062f7930 EFLAGS: 00000246
RAX: 0000000000000058 RBX: ffff88801ee38800 RCX: ffffffff92a214e0
RDX: 0000000000000000 RSI: 00000000000000b8 RDI: ffffffff8e260740
RBP: 0000000000000cc0 R08: 0000000000000000 R09: ffffffff8215f69d
R10: ffff888021292718 R11: ffffed10042524e7 R12: 00000000ffffffff
R13: ffff88801ee38700 R14: ffff88801b68e3c0 R15: 000000000000cff0
 prepare_creds+0x31/0x6c0
 copy_creds+0x106/0xa10
 copy_process+0x95d/0x3b80
 kernel_clone+0x21e/0x870
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f736658eb69
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:00007f73643f5fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f73667b5fa0 RCX: 00007f736658eb69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7366611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f73667b5fa0 R15: 00007fff0a301998
 </TASK>
sched: DL replenish lagged too much
