rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=cd3/1/0x4000000000000000 softirq=202274/202275 fqs=5210
(t=10502 jiffies g=393421 q=1640)
NMI backtrace for cpu 0
CPU: 0 PID: 11950 Comm: syz-executor.5 Not tainted 5.15.0-rc7-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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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:3880 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 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
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:memcpy_erms+0x8/0x10 arch/x86/lib/memcpy_64.S:56
Code: cc cc eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe 7c 35
RSP: 0018:ffffc90003777090 EFLAGS: 00000202
RAX: ffff88806b4eccb8 RBX: ffffc900037773e0 RCX: 0000000000000000
RDX: 0000000000000010 RSI: ffffc900037771e0 RDI: ffff88806b4eccc8
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88806b4eccc7
R10: ffffed100d69d998 R11: 0000000000000001 R12: ffffc900037771d0
R13: dffffc0000000000 R14: 1ffff920006eee81 R15: 0000000000000010
memcpy include/linux/fortify-string.h:191 [inline]
memcpy_common kernel/events/internal.h:174 [inline]
__output_copy kernel/events/internal.h:178 [inline]
perf_output_read_group kernel/events/core.c:6928 [inline]
perf_output_read+0xd7a/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:9177
perf_swevent_overflow kernel/events/core.c:9253 [inline]
perf_swevent_event+0x347/0x550 kernel/events/core.c:9281
do_perf_sw_event kernel/events/core.c:9394 [inline]
___perf_sw_event+0x31a/0x570 kernel/events/core.c:9425
__perf_sw_event+0x54/0x130 kernel/events/core.c:9437
perf_sw_event include/linux/perf_event.h:1173 [inline]
mm_account_fault mm/memory.c:4755 [inline]
handle_mm_fault+0x5ef/0x790 mm/memory.c:4806
do_user_addr_fault+0x48b/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/0x40 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 83 f8
RSP: 0018:ffffc90003777910 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 0000000000004fcb
RDX: 0000000000008000 RSI: 0000000020f20000 RDI: ffff88809a693035
RBP: ffff88809a690000 R08: 0000000000000001 R09: ffff88809a697fff
R10: ffffed10134d2fff R11: 0000000000000000 R12: 0000000020f1cfcb
R13: 0000000020f24fcb R14: 0000000000000000 R15: ffffc90003777d70
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:720 [inline]
_copy_from_iter+0x2a3/0x1320 lib/iov_iter.c:720
copy_from_iter include/linux/uio.h:162 [inline]
copy_from_iter_full include/linux/uio.h:168 [inline]
skb_do_copy_data_nocache+0x145/0x310 include/net/sock.h:2113
skb_copy_to_page_nocache include/net/sock.h:2139 [inline]
tcp_sendmsg_locked+0x1239/0x2f10 net/ipv4/tcp.c:1361
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1461
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
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: 0033:0x7f553a240a39
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:00007f55377b6188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f553a343f60 RCX: 00007f553a240a39
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000007
RBP: 00007f553a29ae8f R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc24f3545f R14: 00007f55377b6300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: cc int3
1: cc int3
2: eb 1e jmp 0x22
4: 0f 1f 00 nopl (%rax)
7: 48 89 f8 mov %rdi,%rax
a: 48 89 d1 mov %rdx,%rcx
d: 48 c1 e9 03 shr $0x3,%rcx
11: 83 e2 07 and $0x7,%edx
14: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi)
17: 89 d1 mov %edx,%ecx
19: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)
1b: c3 retq
1c: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
22: 48 89 f8 mov %rdi,%rax
25: 48 89 d1 mov %rdx,%rcx
28: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)
* 2a: c3 retq <-- trapping instruction
2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
32: 48 89 f8 mov %rdi,%rax
35: 48 83 fa 20 cmp $0x20,%rdx
39: 72 7e jb 0xb9
3b: 40 38 fe cmp %dil,%sil
3e: 7c 35 jl 0x75