rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1390 ticks this GP) idle=cac4/1/0x4000000000000000 softirq=19675/19675 fqs=4
rcu: 	(t=10500 jiffies g=11109 q=722 ncpus=2)
rcu: rcu_preempt kthread starved for 10492 jiffies! g11109 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:26536 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7287 Comm: syz.1.607 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-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_range+0x9/0x2c0
Code: 3e e4 ff 90 0f 0b 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 66 0f 1f 00 55 41 57 41 56 <41> 55 41 54 53 b0 01 48 85 f6 0f 84 ba 01 00 00 4c 8d 04 37 49 39
RSP: 0018:ffffc9000412f9e0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff888100ee5108 RCX: ffffffff8b71260c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888100ee5108
RBP: ffffc9000412faf8 R08: ffff888100ee510b R09: 1ffff110201dca21
R10: dffffc0000000000 R11: ffffed10201dca22 R12: 1ffff92000825f48
R13: 0000000000000001 R14: ffffc9000412fa60 R15: 1ffff110201dca21
FS:  00005555848ab500(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003ff6 CR3: 000000003dd9a000 CR4: 00000000000006f0
DR0: ffff8880b8927a20 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 native_queued_spin_lock_slowpath+0xbc/0x8e0
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 futex_wake+0x1cc/0x500
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2b60d8e9a9
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:00007ffd5d66ae88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f2b60fb5fa0 RCX: 00007f2b60d8e9a9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f2b60fb5fac
RBP: 00007f2b60fb5fa0 R08: 0000000000000001 R09: 00000000265159c3
R10: 00007f2b60fb5fa0 R11: 0000000000000246 R12: 00007f2b60fb5fa0
R13: 00007f2b60fb5fa0 R14: 00000000000000af R15: 0000000000000003
 </TASK>
CPU: 1 UID: 0 PID: 7282 Comm: syz.2.604 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-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: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 92 37 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:ffffc900001e04e0 EFLAGS: 00000206
RAX: edd8fa8c7a327500 RBX: 1ffff9200003c0a4 RCX: edd8fa8c7a327500
RDX: 0000000000000002 RSI: ffffffff8d9987c6 RDI: ffffffff8be29f80
RBP: ffffc900001e05d8 R08: ffffffff8fa1eaf7 R09: 1ffffffff1f43d5e
R10: dffffc0000000000 R11: fffffbfff1f43d5f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fa4a09176c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c34c8ff CR3: 000000011eb84000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 __tlb_remove_table+0x81/0x3b0
 tlb_remove_table_rcu+0x85/0x100
 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: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 82 31 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900073b7b28 EFLAGS: 00000206
RAX: edd8fa8c7a327500 RBX: 0000000000000001 RCX: edd8fa8c7a327500
RDX: ffff888106243980 RSI: ffffffff8db864db RDI: ffffffff8be29f80
RBP: 00000000ffffffff R08: ffff88810624566b R09: 1ffff11020c48acd
R10: dffffc0000000000 R11: ffffed1020c48ace R12: 0000000000000246
R13: ffff888106243980 R14: ffff888100ee5120 R15: 0000000000000000
 __futex_unqueue+0xab/0x160
 futex_wake_mark+0xe2/0x220
 futex_wake+0x37a/0x500
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa49fb8e9a9
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:00007fa4a09170e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fa49fdb5fa8 RCX: 00007fa49fb8e9a9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa49fdb5fac
RBP: 00007fa49fdb5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 00007fa49fdb5fac
R13: 0000000000000000 R14: 00007ffd8483dc90 R15: 00007ffd8483dd78
 </TASK>
sched: DL replenish lagged too much
