rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=03fc/1/0x4000000000000000 softirq=21470/21472 fqs=4982
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   968972          0            0
rcu: 	cputime:    24402      28077           91   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=13921 q=2402 ncpus=2)
CPU: 0 UID: 0 PID: 7759 Comm: syz.1.857 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: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:ffffc900000075a0 EFLAGS: 00000206
RAX: b07a69a39d3d0600 RBX: 1ffff92000000ebc RCX: b07a69a39d3d0600
RDX: 0000000000000003 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc90000007698 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f0bd29426c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001a000 CR3: 000000001e0c6000 CR4: 00000000000006f0
DR0: ffffffffffffffff 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
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 5b 22 21 f6 e8 96 f5 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900047ef320 EFLAGS: 00000282
RAX: b07a69a39d3d0600 RBX: 0000000000000000 RCX: b07a69a39d3d0600
RDX: 0000000000000007 RSI: ffffffff8d9986f9 RDI: 0000000000000001
RBP: ffffc900047ef3d0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920008fde64
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:qlist_free_all+0x46/0x140
Code: 45 31 ed 49 89 ef 4d 89 f4 4d 85 f6 75 40 4c 8b 25 c7 10 98 0b 4c 89 ff e8 77 1a 51 ff 48 c1 e8 06 48 83 e0 c0 49 8b 4c 04 08 <f6> c1 01 75 53 49 01 c4 0f 1f 44 00 00 41 0f b6 44 24 33 c1 e0 18
RSP: 0018:ffffc900047ef498 EFLAGS: 00000206
RAX: 0000000000ee5d00 RBX: ffffc900047ef4d0 RCX: ffffea0000ee5c01
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88803b974d58 R08: 0000000000000032 R09: ffff888022d7d540
R10: 0000000000000000 R11: fffffbfff1f43d1f R12: ffffea0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88803b974d58
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_node_track_caller_noprof+0x216/0x4e0
 kmalloc_reserve+0x136/0x290
 __alloc_skb+0x142/0x2d0
 alloc_skb_with_frags+0xca/0x890
 sock_alloc_send_pskb+0x857/0x990
 unix_stream_sendmsg+0x4c2/0xc90
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0bd1b8eb69
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:00007f0bd2942038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f0bd1db5fa0 RCX: 00007f0bd1b8eb69
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 000000000000000b
RBP: 00007f0bd1c11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0bd1db5fa0 R15: 00007ffc56ad6da8
 </TASK>
sched: DL replenish lagged too much
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105463144354 wd_nsec: 105463146660
