rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P26376
(detected by 1, t=10503 jiffies, g=369205, q=572)
task:syz-executor.4 state:R running task stack:27256 pid:26376 ppid: 6567 flags:0x0000400e
Call Trace:
sched_show_task kernel/sched/core.c:8527 [inline]
sched_show_task+0x433/0x5b0 kernel/sched/core.c:8501
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:3878 [inline]
rcu_sched_clock_irq+0x1fa5/0x2200 kernel/rcu/tree.c:2597
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
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 kernel/kcov.c:200
Code: be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 39 c5 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 70 02 00 00 01 ff 00 74 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b
RSP: 0000:ffffc90018f2f930 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff888085c9bb00 RCX: 0000000000000000
RDX: ffff88809af43a00 RSI: ffffffff88684e7b RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff88684e71 R11: 0000000000000000 R12: ffffc90018f2f9c8
R13: ffff888021f2a098 R14: ffffffff8d5ffb40 R15: 0000000000000001
sctp_bind_addr_state+0xeb/0x1d0 net/sctp/bind_addr.c:407
sctp_copy_local_addr_list+0x1fe/0x4f0 net/sctp/protocol.c:162
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_setsockopt_connectx+0x10d/0x180 net/sctp/socket.c:1333
sctp_setsockopt_connectx_old net/sctp/socket.c:1344 [inline]
sctp_setsockopt+0x3e4d/0xa870 net/sctp/socket.c:4606
__sys_setsockopt+0x2db/0x610 net/socket.c:2176
__do_sys_setsockopt net/socket.c:2187 [inline]
__se_sys_setsockopt net/socket.c:2184 [inline]
__x64_sys_setsockopt+0xba/0x150 net/socket.c:2184
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: 0033:0x7ff6da7e6ae9
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:00007ff6d7d5c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ff6da8f9f60 RCX: 00007ff6da7e6ae9
RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005
RBP: 00007ff6da840f6d R08: 0000000000000020 R09: 0000000000000000
R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6c38e41f R14: 00007ff6d7d5c300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: be b0 01 00 00 mov $0x1b0,%esi
5: e8 b4 ff ff ff callq 0xffffffbe
a: 31 c0 xor %eax,%eax
c: c3 retq
d: 90 nop
e: 65 8b 05 39 c5 8a 7e mov %gs:0x7e8ac539(%rip),%eax # 0x7e8ac54e
15: 89 c1 mov %eax,%ecx
17: 48 8b 34 24 mov (%rsp),%rsi
1b: 81 e1 00 01 00 00 and $0x100,%ecx
21: 65 48 8b 14 25 40 70 mov %gs:0x27040,%rdx
28: 02 00
* 2a: a9 00 01 ff 00 test $0xff0100,%eax <-- trapping instruction
2f: 74 0e je 0x3f
31: 85 c9 test %ecx,%ecx
33: 74 35 je 0x6a
35: 8b 82 a4 15 00 00 mov 0x15a4(%rdx),%eax
3b: 85 c0 test %eax,%eax
3d: 74 2b je 0x6a
3f: 8b .byte 0x8b