rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10490 ticks this GP) idle=e5c4/1/0x4000000000000000 softirq=207207/207209 fqs=4549
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1008017          0            0
rcu: 	cputime:    25399      27090           91   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=29733 q=3304 ncpus=2)
CPU: 1 UID: 0 PID: 11846 Comm: syz.8.1629 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: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:ffffc900001e0600 EFLAGS: 00000206
RAX: 7731c4c086d83700 RBX: 1ffff9200003c0c8 RCX: 7731c4c086d83700
RDX: 0000000000000002 RSI: ffffffff8d99883e RDI: ffffffff8be29f40
RBP: ffffc900001e06f8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f824d3896c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000010da82000 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
 slab_free_after_rcu_debug+0x129/0x2a0
 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:__schedule+0x1ad/0x4d00
Code: 29 dc b3 f6 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 10 dc b3 f6 48 81 3b 9d 6e ac 57 0f 85 26 18 00 00 <83> 7c 24 70 00 7f 42 49 8d 5e 18 48 89 d8 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc90007237020 EFLAGS: 00000246
RAX: 1ffff92000e46000 RBX: ffffc90007230000 RCX: 7731c4c086d83700
RDX: 0000000000000000 RSI: ffffffff8be29f20 RDI: ffffffff8be29ee0
RBP: ffffc90007237230 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff88813663aac8
R13: dffffc0000000000 R14: ffff88810fd38000 R15: ffff8881a3c1f000
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:get_random_u32+0x4e7/0x940
Code: e3 00 02 00 00 75 7e e8 37 f5 75 fc 48 8b 5c 24 28 4d 85 ff 75 07 e8 28 f5 75 fc eb 06 e8 21 f5 75 fc fb 8b 84 24 00 01 00 00 <48> c7 44 24 40 0e 36 e0 45 42 c7 04 23 00 00 00 00 4a c7 44 23 0c
RSP: 0018:ffffc900072373a0 EFLAGS: 00000287
RAX: 000000009501f890 RBX: 1ffff92000e46e7c RCX: 0000000000080000
RDX: ffffc90033c86000 RSI: 000000000000032c RDI: 000000000000032d
RBP: ffffc90007237510 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: 0000000000000008 R14: ffff888136636230 R15: 0000000000000200
 __get_random_u32_below+0x14/0x90
 sctp_get_port_local+0x350/0x1610
 sctp_do_bind+0x4ea/0x940
 sctp_connect_new_asoc+0x25c/0x690
 sctp_sendmsg+0x155c/0x2810
 __sock_sendmsg+0x19c/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: 0033:0x7f824c58e9a9
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:00007f824d389038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f824c7b5fa0 RCX: 00007f824c58e9a9
RDX: 0000000000000041 RSI: 0000200000002dc0 RDI: 000000000000000a
RBP: 00007f824c610d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f824c7b5fa0 R15: 00007fff710c6b98
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 104876326345 wd_nsec: 104876328736
