rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14620
(detected by 1, t=10502 jiffies, g=311469, q=681)
task:syz-executor.3 state:R running task stack:27664 pid:14620 ppid: 6567 flags:0x00004006
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:8545 [inline]
sched_show_task+0x433/0x5b0 kernel/sched/core.c:8519
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:227 [inline]
print_other_cpu_stall kernel/rcu/tree_stall.h:567 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq+0x1fa5/0x2200 kernel/rcu/tree.c:2599
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
</IRQ>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:197
Code: ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 49 f2 8b 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9 00 01 ff 00 74 0e
RSP: 0018:ffffc90017147a38 EFLAGS: 00000293
RAX: 0000000080000000 RBX: ffff88803f61c300 RCX: 0000000080000000
RDX: 0000000000040000 RSI: ffffffff885adee1 RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: 000000000000000a
R10: ffffffff885adf3f R11: 000000000000000a R12: ffffc90017147ad0
R13: ffff88806fdc8098 R14: ffffffff8d3d30e0 R15: 0000000000000000
sctp_bind_addr_state+0xb1/0x1d0 net/sctp/bind_addr.c:405
sctp_copy_local_addr_list+0x1fe/0x4f0 net/sctp/protocol.c:163
sctp_copy_one_addr net/sctp/bind_addr.c:460 [inline]
sctp_bind_addr_copy+0xde/0x460 net/sctp/bind_addr.c:56
sctp_connect_new_asoc+0x1cd/0x770 net/sctp/socket.c:1092
__sctp_connect+0x3d0/0xc30 net/sctp/socket.c:1194
sctp_connect net/sctp/socket.c:4808 [inline]
sctp_inet_connect+0x15e/0x200 net/sctp/socket.c:4823
__sys_connect_file+0x155/0x1a0 net/socket.c:1896
__sys_connect+0x161/0x190 net/socket.c:1913
__do_sys_connect net/socket.c:1923 [inline]
__se_sys_connect net/socket.c:1920 [inline]
__x64_sys_connect+0x6f/0xb0 net/socket.c:1920
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd4caeb98d9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd4c8430188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007fd4cafbdf60 RCX: 00007fd4caeb98d9
RDX: 000000000000001c RSI: 0000000020000140 RDI: 0000000000000008
RBP: 00007fd4caf13cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4eabcc3f R14: 00007fd4c8430300 R15: 0000000000022000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: ba 08 00 00 00 mov $0x8,%edx
5: 4d 8b 03 mov (%r11),%r8
8: 48 0f bd ca bsr %rdx,%rcx
c: 49 8b 45 00 mov 0x0(%r13),%rax
10: 48 63 c9 movslq %ecx,%rcx
13: e9 64 ff ff ff jmpq 0xffffff7c
18: 0f 1f 00 nopl (%rax)
1b: 65 8b 05 49 f2 8b 7e mov %gs:0x7e8bf249(%rip),%eax # 0x7e8bf26b
22: 89 c1 mov %eax,%ecx
24: 48 8b 34 24 mov (%rsp),%rsi
* 28: 81 e1 00 01 00 00 and $0x100,%ecx <-- trapping instruction
2e: 65 48 8b 14 25 40 f0 mov %gs:0x1f040,%rdx
35: 01 00
37: a9 00 01 ff 00 test $0xff0100,%eax
3c: 74 0e je 0x4c