rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10500 ticks this GP) idle=1b5/1/0x4000000000000000 softirq=42866/42866 fqs=5245
(t=10502 jiffies g=68533 q=2296)
NMI backtrace for cpu 1
CPU: 1 PID: 22670 Comm: syz-executor.1 Not tainted 5.15.0-next-20211115-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:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:200
Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 70 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 ac 15 00 00 85 c0 74 2b 8b 82 88 15 00 00 <83> f8 02 75 20 48 8b 8a 90 15 00 00 8b 92 8c 15 00 00 48 8b 01 48
RSP: 0018:ffffc9000499f110 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffc9000499f460 RCX: 0000000000000000
RDX: ffff88807dd057c0 RSI: ffffffff81969fca RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888075f39457
R10: ffffffff81969f21 R11: 0000000000000001 R12: ffffc9000499f260
R13: dffffc0000000000 R14: 0000000000000ba8 R15: 0000000000000010
__output_copy kernel/events/internal.h:178 [inline]
perf_output_read_group kernel/events/core.c:6928 [inline]
perf_output_read+0xe5a/0x1310 kernel/events/core.c:6961
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:ffffc9000499f9b8 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 0000000000002fcb
RDX: 0000000000008000 RSI: 0000000020fd2000 RDI: ffff8880269c5035
RBP: ffff8880269c0000 R08: 0000000000000001 R09: ffff8880269c7fff
R10: ffffed1004d38fff R11: 0000000000000000 R12: 0000000020fccfcb
R13: 0000000020fd4fcb R14: 0000000000000000 R15: ffffc9000499fd70
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:2145 [inline]
skb_copy_to_page_nocache include/net/sock.h:2171 [inline]
tcp_sendmsg_locked+0x12eb/0x3040 net/ipv4/tcp.c:1334
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1440
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
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: 0033:0x7f78c91c0ae9
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:00007f78c6736188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f78c92d3f60 RCX: 00007f78c91c0ae9
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 00007f78c921af6d R08: 0000000000000000 R09: 0000000000000053
R10: 00000000fffffff1 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd68e357af R14: 00007f78c6736300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 81 e1 00 01 00 00 and $0x100,%ecx
6: 65 48 8b 14 25 40 70 mov %gs:0x27040,%rdx
d: 02 00
f: a9 00 01 ff 00 test $0xff0100,%eax
14: 74 0e je 0x24
16: 85 c9 test %ecx,%ecx
18: 74 35 je 0x4f
1a: 8b 82 ac 15 00 00 mov 0x15ac(%rdx),%eax
20: 85 c0 test %eax,%eax
22: 74 2b je 0x4f
24: 8b 82 88 15 00 00 mov 0x1588(%rdx),%eax
* 2a: 83 f8 02 cmp $0x2,%eax <-- trapping instruction
2d: 75 20 jne 0x4f
2f: 48 8b 8a 90 15 00 00 mov 0x1590(%rdx),%rcx
36: 8b 92 8c 15 00 00 mov 0x158c(%rdx),%edx
3c: 48 8b 01 mov (%rcx),%rax
3f: 48 rex.W