=============================
WARNING: suspicious RCU usage
6.9.0-rc5-next-20240426-syzkaller #0 Not tainted
-----------------------------
kernel/rcu/tree.c:276 Illegal rcu_softirq_qs() in RCU read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by ksoftirqd/1/24:
#0: ffffffff8e333b20 (
rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:933 [inline]
rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2022 [inline]
rcu_read_lock_sched){....}-{1:2}, at: __virt_addr_valid+0x183/0x520 arch/x86/mm/physaddr.c:65
stack backtrace:
CPU: 1 PID: 24 Comm: ksoftirqd/1 Not tainted 6.9.0-rc5-next-20240426-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
lockdep_rcu_suspicious+0x221/0x340 kernel/locking/lockdep.c:6712
rcu_softirq_qs+0xd9/0x370 kernel/rcu/tree.c:273
__do_softirq+0x5fd/0x980 kernel/softirq.c:568
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:538 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1148 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xb0/0x9f0 kernel/locking/lockdep.c:5765
Code: 8b 05 20 08 91 7e 83 f8 08 0f 83 d6 05 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 e8 7f ac 8f be 08 00 00 00 e8 20 3f 89 00 <48> 0f a3 1d d0 b2 39 0e 73 16 e8 d1 c8 09 00 84 c0 75 0d 80 3d 76
RSP: 0018:ffffc900001e7920 EFLAGS: 00000256
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8172cd10
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fac7fe8
RBP: ffffc900001e7a48 R08: ffffffff8fac7fef R09: 1ffffffff1f58ffd
R10: dffffc0000000000 R11: fffffbfff1f58ffe R12: 1ffff9200003cf30
R13: ffffffff81423f93 R14: ffffffff81423f93 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:339 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:954 [inline]
pfn_valid include/linux/mmzone.h:2032 [inline]
__virt_addr_valid+0x41e/0x520 arch/x86/mm/physaddr.c:65
kasan_addr_to_slab+0xd/0x80 mm/kasan/common.c:37
__kasan_record_aux_stack+0x11/0xc0 mm/kasan/generic.c:526
__call_rcu_common kernel/rcu/tree.c:3103 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3207
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0x17f0/0x4a50 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
smpboot_thread_fn+0x61e/0xa30 kernel/smpboot.c:160
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
----------------
Code disassembly (best guess):
0: 8b 05 20 08 91 7e mov 0x7e910820(%rip),%eax # 0x7e910826
6: 83 f8 08 cmp $0x8,%eax
9: 0f 83 d6 05 00 00 jae 0x5e5
f: 89 c3 mov %eax,%ebx
11: 48 89 d8 mov %rbx,%rax
14: 48 c1 e8 06 shr $0x6,%rax
18: 48 8d 3c c5 e8 7f ac lea -0x70538018(,%rax,8),%rdi
1f: 8f
20: be 08 00 00 00 mov $0x8,%esi
25: e8 20 3f 89 00 call 0x893f4a
* 2a: 48 0f a3 1d d0 b2 39 bt %rbx,0xe39b2d0(%rip) # 0xe39b302 <-- trapping instruction
31: 0e
32: 73 16 jae 0x4a
34: e8 d1 c8 09 00 call 0x9c90a
39: 84 c0 test %al,%al
3b: 75 0d jne 0x4a
3d: 80 .byte 0x80
3e: 3d .byte 0x3d
3f: 76 .byte 0x76