rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=d5f/1/0x4000000000000000 softirq=58896/58897 fqs=5247
(t=10502 jiffies g=87945 q=4377)
NMI backtrace for cpu 1
CPU: 1 PID: 20877 Comm: syz-executor.2 Not tainted 5.16.0-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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:604 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
rcu_pending kernel/rcu/tree.c:3919 [inline]
rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2617
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:check_kcov_mode kernel/kcov.c:177 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:221 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x31/0x90 kernel/kcov.c:294
Code: 14 25 c0 6f 02 00 65 8b 05 64 c4 7d 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 6a 83 ba a4 15 00 00 00 74 61 8b 82 80 15 00 00 <83> f8 03 75 56 48 8b 8a 88 15 00 00 44 8b 8a 84 15 00 00 49 c1 e1
RSP: 0018:ffffc9000b206bf8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000530 RCX: dffffc0000000000
RDX: ffff8880349c5700 RSI: 0000000000000528 RDI: 0000000000000000
RBP: ffffc9000b206d90 R08: ffffffff81a7c4ec R09: ffffed1003bf095b
R10: ffffed1003bf095b R11: 0000000000000000 R12: ffffc9000b2070a8
R13: 0000000000000008 R14: dffffc0000000000 R15: ffffc9000b207098
__output_copy kernel/events/internal.h:178 [inline]
perf_output_read_group kernel/events/core.c:6949 [inline]
perf_output_read+0x119c/0x1480 kernel/events/core.c:6982
perf_output_sample+0x338/0x23e0 kernel/events/core.c:7029
__perf_event_output kernel/events/core.c:7514 [inline]
perf_event_output_forward+0x1e1/0x2c0 kernel/events/core.c:7528
__perf_event_overflow+0x1f8/0x380 kernel/events/core.c:9228
do_perf_sw_event kernel/events/core.c:9445 [inline]
___perf_sw_event+0x465/0x640 kernel/events/core.c:9476
__perf_sw_event+0x13f/0x270 kernel/events/core.c:9488
handle_mm_fault+0x2eef/0x39e0 mm/memory.c:4819
do_user_addr_fault+0x8cc/0x10c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0xa1/0x1e0 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 0f 82 60 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 06 66 0f 1f 44 00 00 83 f8 12 74
RSP: 0018:ffffc9000b2078b8 EFLAGS: 00050206
RAX: ffffffff840f3401 RBX: ffff88807bae0000 RCX: 0000000000004fcb
RDX: 0000000000008000 RSI: 0000000020fa0000 RDI: ffff88807bae3035
RBP: ffffc9000b207a10 R08: dffffc0000000000 R09: ffffed100f75d000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000
R13: 00007ffffffff000 R14: 0000000020f9cfcb R15: ffffc9000b207e68
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 lib/iov_iter.c:166 [inline]
_copy_from_iter+0x33c/0x1170 lib/iov_iter.c:765
copy_from_iter include/linux/uio.h:171 [inline]
copy_from_iter_full include/linux/uio.h:177 [inline]
skb_do_copy_data_nocache include/net/sock.h:2189 [inline]
skb_copy_to_page_nocache include/net/sock.h:2215 [inline]
tcp_sendmsg_locked+0x1bed/0x48a0 net/ipv4/tcp.c:1334
tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1440
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg net/socket.c:725 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2040
__do_sys_sendto net/socket.c:2052 [inline]
__se_sys_sendto net/socket.c:2048 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2048
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f04ac32cfe9
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:00007f04aaca2168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f04ac43ff60 RCX: 00007f04ac32cfe9
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000011
RBP: 00007f04ac38708d R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff85c7a72f R14: 00007f04aaca2300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 14 25 adc $0x25,%al
2: c0 6f 02 00 shrb $0x0,0x2(%rdi)
6: 65 8b 05 64 c4 7d 7e mov %gs:0x7e7dc464(%rip),%eax # 0x7e7dc471
d: a9 00 01 ff 00 test $0xff0100,%eax
12: 74 10 je 0x24
14: a9 00 01 00 00 test $0x100,%eax
19: 74 6a je 0x85
1b: 83 ba a4 15 00 00 00 cmpl $0x0,0x15a4(%rdx)
22: 74 61 je 0x85
24: 8b 82 80 15 00 00 mov 0x1580(%rdx),%eax
* 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction
2d: 75 56 jne 0x85
2f: 48 8b 8a 88 15 00 00 mov 0x1588(%rdx),%rcx
36: 44 8b 8a 84 15 00 00 mov 0x1584(%rdx),%r9d
3d: 49 rex.WB
3e: c1 .byte 0xc1
3f: e1 .byte 0xe1