=============================
WARNING: suspicious RCU usage
6.9.0-rc4-next-20240418-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/0/16:
#0: ffffffff8e333ae0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e333ae0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:933 [inline]
#0: ffffffff8e333ae0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2022 [inline]
#0: ffffffff8e333ae0 (rcu_read_lock_sched){....}-{1:2}, at: __virt_addr_valid+0x183/0x520 arch/x86/mm/physaddr.c:65
stack backtrace:
CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.9.0-rc4-next-20240418-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:lock_release+0x24/0x9f0 kernel/locking/lockdep.c:5762
Code: 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 00 01 00 00 49 89 f5 48 89 7c 24 20 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 e0 00 00 00 49 bf 00 00 00
RSP: 0018:ffffc90000157920 EFLAGS: 00000282
RAX: ffffffff81424209 RBX: 0000000000000001 RCX: ffff888016ec5a00
RDX: 0000000000000000 RSI: ffffffff81424043 RDI: ffffffff8e333ae0
RBP: ffffc90000157a48 R08: ffffffff814241f7 R09: 1ffffffff25ef6b4
R10: dffffc0000000000 R11: fffffbfff25ef6b5 R12: 000000006bb51778
R13: ffffffff81424043 R14: ffffffff81424043 R15: ffff88813fff91a0
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:3102 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3206
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: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: f3 0f 1e fa endbr64
a: 55 push %rbp
b: 48 89 e5 mov %rsp,%rbp
e: 41 57 push %r15
10: 41 56 push %r14
12: 41 55 push %r13
14: 41 54 push %r12
16: 53 push %rbx
17: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
1b: 48 81 ec 00 01 00 00 sub $0x100,%rsp
22: 49 89 f5 mov %rsi,%r13
25: 48 89 7c 24 20 mov %rdi,0x20(%rsp)
* 2a: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax <-- trapping instruction
31: 00 00
33: 48 89 84 24 e0 00 00 mov %rax,0xe0(%rsp)
3a: 00
3b: 49 rex.WB
3c: bf .byte 0xbf
3d: 00 00 add %al,(%rax)