=============================
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]
#0: ffffffff8e333b20 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:933 [inline]
#0: ffffffff8e333b20 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2022 [inline]
#0: ffffffff8e333b20 (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:lockdep_enabled kernel/locking/lockdep.c:116 [inline]
RIP: 0010:lock_release+0xe0/0x9f0 kernel/locking/lockdep.c:5767
Code: 39 0e 73 16 e8 d1 c8 09 00 84 c0 75 0d 80 3d 76 32 24 0e 00 0f 84 d4 05 00 00 48 c7 c0 3c b3 ac 8f 48 c1 e8 03 42 0f b6 04 38 <84> c0 0f 85 f7 05 00 00 83 3d ed e5 39 0e 00 0f 84 32 05 00 00 65
RSP: 0018:ffffc900001e7920 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8172cd10
RDX: 0000000000000000 RSI: ffffffff8c1fc4c0 RDI: ffffffff8c1fc480
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: 39 0e cmp %ecx,(%rsi)
2: 73 16 jae 0x1a
4: e8 d1 c8 09 00 call 0x9c8da
9: 84 c0 test %al,%al
b: 75 0d jne 0x1a
d: 80 3d 76 32 24 0e 00 cmpb $0x0,0xe243276(%rip) # 0xe24328a
14: 0f 84 d4 05 00 00 je 0x5ee
1a: 48 c7 c0 3c b3 ac 8f mov $0xffffffff8facb33c,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 f7 05 00 00 jne 0x629
32: 83 3d ed e5 39 0e 00 cmpl $0x0,0xe39e5ed(%rip) # 0xe39e626
39: 0f 84 32 05 00 00 je 0x571
3f: 65 gs