rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (421 ticks this GP) idle=489/1/0x4000000000000000 softirq=232508/232508 fqs=274
(t=10513 jiffies g=467897 q=1171)
NMI backtrace for cpu 1
CPU: 1 PID: 2511 Comm: syz-executor.0 Not tainted 5.15.0-rc3-next-20210927-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:3882 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2601
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:1428
__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+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 1a 60 26 f8 48 89 ef e8 62 d6 26 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 e3 73 1a f8 65 8b 05 2c 4e cd 76 85 c0 74 0a 5b 5d c3 e8 f0 4a
RSP: 0018:ffffc90000dc0b08 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1fae8d6
RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffff88801e6d0000 R08: 0000000000000001 R09: ffffffff8fd0da57
R10: 0000000000000001 R11: ffffc90012075000 R12: ffff888076da4408
R13: ffff88815ece9f00 R14: dffffc0000000000 R15: ffff888076da4400
spin_unlock_irqrestore include/linux/spinlock.h:423 [inline]
dummy_timer+0x12f6/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:2001
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 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_const_cmp8+0xc/0x70 kernel/kcov.c:290
Code: ea dc 60 02 e9 2d fd ff ff e8 f0 1d bc 07 e9 7c fe ff ff e8 e6 1d bc 07 e9 65 fc ff ff 90 49 89 f8 bf 03 00 00 00 4c 8b 14 24 <48> 89 f1 65 48 8b 34 25 40 70 02 00 e8 33 f2 ff ff 84 c0 74 48 48
RSP: 0018:ffffc90019aef5d0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000cc0 RCX: ffffc900032a1000
RDX: 1ffffd4000b1dc78 RSI: 057ff00000080001 RDI: 0000000000000003
RBP: ffffea00058ee3c0 R08: ffffffffffffffff R09: ffffffff8fd0d977
R10: ffffffff81b65b82 R11: 0000000000000000 R12: 057ff00000080001
R13: 0000000000000001 R14: ffffea00058ee3c0 R15: ffffea00058ee3c0
page_to_nid include/linux/mm.h:1386 [inline]
__cgroup_throttle_swaprate+0x42/0x6b0 mm/swapfile.c:3785
cgroup_throttle_swaprate include/linux/swap.h:735 [inline]
shmem_add_to_page_cache+0xb7d/0x15d0 mm/shmem.c:722
shmem_getpage_gfp+0x838/0x22d0 mm/shmem.c:1937
shmem_fault+0x1b4/0x750 mm/shmem.c:2115
__do_fault+0x10d/0x4d0 mm/memory.c:3849
do_read_fault mm/memory.c:4155 [inline]
do_fault mm/memory.c:4284 [inline]
handle_pte_fault mm/memory.c:4542 [inline]
__handle_mm_fault+0x28e8/0x5120 mm/memory.c:4677
handle_mm_fault+0x1c8/0x790 mm/memory.c:4775
faultin_page mm/gup.c:937 [inline]
__get_user_pages+0x503/0xf80 mm/gup.c:1158
populate_vma_page_range+0x24d/0x330 mm/gup.c:1490
__mm_populate+0x1ea/0x3e0 mm/gup.c:1599
mm_populate include/linux/mm.h:2733 [inline]
vm_mmap_pgoff+0x20e/0x290 mm/util.c:524
ksys_mmap_pgoff+0xe1/0x620 mm/mmap.c:1624
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: 0033:0x7f3a10318709
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:00007f3a0d86e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f3a1041d020 RCX: 00007f3a10318709
RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f3a10372cb4 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff805069ef R14: 00007f3a0d86e300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 74 24 je 0x26
2: 10 e8 adc %ch,%al
4: 1a 60 26 sbb 0x26(%rax),%ah
7: f8 clc
8: 48 89 ef mov %rbp,%rdi
b: e8 62 d6 26 f8 callq 0xf826d672
10: 81 e3 00 02 00 00 and $0x200,%ebx
16: 75 25 jne 0x3d
18: 9c pushfq
19: 58 pop %rax
1a: f6 c4 02 test $0x2,%ah
1d: 75 2d jne 0x4c
1f: 48 85 db test %rbx,%rbx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 e3 73 1a f8 callq 0xf81a7412 <-- trapping instruction
2f: 65 8b 05 2c 4e cd 76 mov %gs:0x76cd4e2c(%rip),%eax # 0x76cd4e62
36: 85 c0 test %eax,%eax
38: 74 0a je 0x44
3a: 5b pop %rbx
3b: 5d pop %rbp
3c: c3 retq
3d: e8 .byte 0xe8
3e: f0 lock
3f: 4a rex.WX