rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10500 ticks this GP) idle=c61/1/0x4000000000000000 softirq=74333/74333 fqs=5218
(t=10502 jiffies g=121881 q=4651)
NMI backtrace for cpu 0
CPU: 0 PID: 32693 Comm: syz-executor.1 Not tainted 5.16.0-rc3-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:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2597
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:1421
__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:kasan_check_range+0x228/0x2f0 mm/kasan/generic.c:189
Code: 5e 07 4d 85 f6 49 0f 49 de 48 83 e3 f8 49 29 de 74 11 45 0f b6 1f 45 84 db 75 64 49 ff c7 49 ff ce 75 ef 5b 41 5c 41 5d 41 5e <41> 5f c3 45 84 db 75 50 45 8a 59 01 45 84 db 0f 85 8a 00 00 00 45
RSP: 0018:ffffc9000503ec48 EFLAGS: 00000256
RAX: 1ffff92000a07e01 RBX: ffffffff81a6a310 RCX: ffffffff81a6a310
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffff88803a693d68
RBP: ffffc9000503ee10 R08: dffffc0000000000 R09: ffffed10074d27af
R10: ffffed10074d27af R11: 0000000000000000 R12: 0000000000000010
R13: 0000000000000010 R14: ffffc9000503ed60 R15: ffff88803a693d68
memcpy+0x3c/0x60 mm/kasan/shadow.c:66
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+0x1150/0x1480 kernel/events/core.c:6961
perf_output_sample+0x338/0x23e0 kernel/events/core.c:7008
__perf_event_output kernel/events/core.c:7493 [inline]
perf_event_output_forward+0x1e1/0x2c0 kernel/events/core.c:7507
__perf_event_overflow+0x1f8/0x380 kernel/events/core.c:9207
do_perf_sw_event kernel/events/core.c:9424 [inline]
___perf_sw_event+0x465/0x640 kernel/events/core.c:9455
__perf_sw_event+0x13f/0x270 kernel/events/core.c:9467
handle_mm_fault+0x21cc/0x2560 mm/memory.c:4798
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/0x30
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:ffffc9000503f8b8 EFLAGS: 00050206
RAX: ffffffff84141301 RBX: ffff888034530000 RCX: 0000000000004fcb
RDX: 0000000000008000 RSI: 0000000020fb8000 RDI: ffff888034533035
RBP: ffffc9000503fa10 R08: dffffc0000000000 R09: ffffed10068a7000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000
R13: 00007ffffffff000 R14: 0000000020fb4fcb R15: ffffc9000503fe68
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:168 [inline]
_copy_from_iter+0x33c/0x1080 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:2158 [inline]
skb_copy_to_page_nocache include/net/sock.h:2184 [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:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2044
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: 0033:0x7f061ef5eae9
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:00007f061ded4188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f061f071f60 RCX: 00007f061ef5eae9
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 000000000000000e
RBP: 00007f061efb8ff7 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5b059f6f R14: 00007f061ded4300 R15: 0000000000022000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 4d 85 f6 test %r14,%r14
3: 49 0f 49 de cmovns %r14,%rbx
7: 48 83 e3 f8 and $0xfffffffffffffff8,%rbx
b: 49 29 de sub %rbx,%r14
e: 74 11 je 0x21
10: 45 0f b6 1f movzbl (%r15),%r11d
14: 45 84 db test %r11b,%r11b
17: 75 64 jne 0x7d
19: 49 ff c7 inc %r15
1c: 49 ff ce dec %r14
1f: 75 ef jne 0x10
21: 5b pop %rbx
22: 41 5c pop %r12
24: 41 5d pop %r13
26: 41 5e pop %r14
* 28: 41 5f pop %r15 <-- trapping instruction
2a: c3 retq
2b: 45 84 db test %r11b,%r11b
2e: 75 50 jne 0x80
30: 45 8a 59 01 mov 0x1(%r9),%r11b
34: 45 84 db test %r11b,%r11b
37: 0f 85 8a 00 00 00 jne 0xc7
3d: 45 rex.RB