rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10500 ticks this GP) idle=0f3/1/0x4000000000000000 softirq=176751/176751 fqs=5194
(t=10503 jiffies g=346769 q=2330)
NMI backtrace for cpu 0
CPU: 0 PID: 28589 Comm: syz-executor.3 Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 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:perf_output_read_group kernel/events/core.c:6917 [inline]
RIP: 0010:perf_output_read+0xe72/0x1310 kernel/events/core.c:6961
Code: 00 48 c7 43 18 00 10 00 00 48 89 43 28 e8 66 4b e1 ff 31 ff 48 89 ee e8 ec 4d e1 ff 48 85 ed 0f 85 cf fe ff ff e8 4e 4b e1 ff <48> 8b 44 24 10 48 8d 78 10 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f
RSP: 0018:ffffc90010fbf118 EFLAGS: 00000246
RAX: 0000000000040000 RBX: ffffc90010fbf460 RCX: ffffc9000ef93000
RDX: 0000000000040000 RSI: ffffffff819658b2 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88804ea6cc17
R10: ffffffff819658a4 R11: 0000000000000001 R12: ffffc90010fbf260
R13: dffffc0000000000 R14: 00000000000003e8 R15: 0000000000000010
perf_output_sample+0xd12/0x1d80 kernel/events/core.c:7008
__perf_event_output kernel/events/core.c:7493 [inline]
perf_event_output_forward+0x119/0x280 kernel/events/core.c:7507
__perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9207
perf_swevent_overflow kernel/events/core.c:9283 [inline]
perf_swevent_event+0x347/0x550 kernel/events/core.c:9311
do_perf_sw_event kernel/events/core.c:9424 [inline]
___perf_sw_event+0x31a/0x570 kernel/events/core.c:9455
__perf_sw_event+0x54/0x130 kernel/events/core.c:9467
perf_sw_event include/linux/perf_event.h:1174 [inline]
mm_account_fault mm/memory.c:4751 [inline]
handle_mm_fault+0x5ef/0x790 mm/memory.c:4802
do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:206
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffffc90010fbf9b8 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 0000000000003fcb
RDX: 0000000000008000 RSI: 0000000020fc1000 RDI: ffff888049e4c035
RBP: ffff888049e48000 R08: 0000000000000001 R09: ffff888049e4ffff
R10: ffffed10093c9fff R11: 0000000000000000 R12: 0000000020fbcfcb
R13: 0000000020fc4fcb R14: 0000000000000000 R15: ffffc90010fbfd70
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
copyin.part.0+0xe4/0x110 lib/iov_iter.c:168
copyin lib/iov_iter.c:767 [inline]
_copy_from_iter+0x2a3/0x1320 lib/iov_iter.c:767
copy_from_iter include/linux/uio.h:164 [inline]
copy_from_iter_full include/linux/uio.h:170 [inline]
skb_do_copy_data_nocache include/net/sock.h:2174 [inline]
skb_copy_to_page_nocache include/net/sock.h:2200 [inline]
tcp_sendmsg_locked+0x12f3/0x3050 net/ipv4/tcp.c:1334
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1440
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:820
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
__sys_sendto+0x21c/0x320 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
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: 0033:0x7fec60516ae9
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:00007fec5da8c188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fec60629f60 RCX: 00007fec60516ae9
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 00007fec60570f6d R08: 0000000000000000 R09: 0000000000000053
R10: 00000000fffffff1 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee75f0dff R14: 00007fec5da8c300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 00 48 c7 add %cl,-0x39(%rax)
3: 43 18 00 rex.XB sbb %al,(%r8)
6: 10 00 adc %al,(%rax)
8: 00 48 89 add %cl,-0x77(%rax)
b: 43 28 e8 rex.XB sub %bpl,%r8b
e: 66 4b e1 ff data16 rex.WXB loope 0x11
12: 31 ff xor %edi,%edi
14: 48 89 ee mov %rbp,%rsi
17: e8 ec 4d e1 ff callq 0xffe14e08
1c: 48 85 ed test %rbp,%rbp
1f: 0f 85 cf fe ff ff jne 0xfffffef4
25: e8 4e 4b e1 ff callq 0xffe14b78
* 2a: 48 8b 44 24 10 mov 0x10(%rsp),%rax <-- trapping instruction
2f: 48 8d 78 10 lea 0x10(%rax),%rdi
33: 48 89 f8 mov %rdi,%rax
36: 48 c1 e8 03 shr $0x3,%rax
3a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
3f: 0f .byte 0xf