=============================
WARNING: suspicious RCU usage
6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0 Not tainted
-----------------------------
net/netfilter/ipset/ip_set_hash_gen.h:455 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by swapper/2/0:
#0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2184 [inline]
#0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_core+0x7bd/0x1680 kernel/rcu/tree.c:2465
stack backtrace:
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
lockdep_rcu_suspicious+0x20c/0x3b0 kernel/locking/lockdep.c:6712
hash_netportnet6_destroy+0x2c4/0x3a0 net/netfilter/ipset/ip_set_hash_gen.h:455
ip_set_destroy_set+0x65/0x100 net/netfilter/ipset/ip_set_core.c:1180
rcu_do_batch kernel/rcu/tree.c:2190 [inline]
rcu_core+0x819/0x1680 kernel/rcu/tree.c:2465
__do_softirq+0x21c/0x8e7 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:743
Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 94 2c 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90000467e08 EFLAGS: 00000242
RAX: 000000000036335b RBX: 0000000000000002 RCX: ffffffff8ab9fe8b
RDX: 0000000000000000 RSI: ffffffff8aecb020 RDI: ffffffff8b4db9c0
RBP: ffffed1002b7b480 R08: 0000000000000001 R09: ffffed1005886ded
R10: ffff88802c436f6b R11: 0000000000000000 R12: 0000000000000002
R13: ffff888015bda400 R14: ffffffff8f791250 R15: 0000000000000000
default_idle_call+0x69/0xa0 kernel/sched/idle.c:97
cpuidle_idle_call kernel/sched/idle.c:170 [inline]
do_idle+0x336/0x400 kernel/sched/idle.c:312
cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:410
start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:336
secondary_startup_64_no_verify+0x170/0x17b
=============================
WARNING: suspicious RCU usage
6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0 Not tainted
-----------------------------
net/netfilter/ipset/ip_set_hash_gen.h:455 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by ksoftirqd/2/22:
#0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2184 [inline]
#0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_core+0x7bd/0x1680 kernel/rcu/tree.c:2465
stack backtrace:
CPU: 2 PID: 22 Comm: ksoftirqd/2 Not tainted 6.8.0-rc3-syzkaller-00041-g547ab8fc4cb0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
lockdep_rcu_suspicious+0x20c/0x3b0 kernel/locking/lockdep.c:6712
hash_ip6_destroy+0x2c4/0x3a0 net/netfilter/ipset/ip_set_hash_gen.h:455
ip_set_destroy_set+0x65/0x100 net/netfilter/ipset/ip_set_core.c:1180
rcu_do_batch kernel/rcu/tree.c:2190 [inline]
rcu_core+0x819/0x1680 kernel/rcu/tree.c:2465
__do_softirq+0x21c/0x8e7 kernel/softirq.c:553
run_ksoftirqd kernel/softirq.c:921 [inline]
run_ksoftirqd+0x35/0x60 kernel/softirq.c:913
smpboot_thread_fn+0x669/0xa20 kernel/smpboot.c:164
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
----------------
Code disassembly (best guess):
0: 4c 01 c7 add %r8,%rdi
3: 4c 29 c2 sub %r8,%rdx
6: e9 72 ff ff ff jmp 0xffffff7d
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: f3 0f 1e fa endbr64
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d 33 94 2c 00 verw 0x2c9433(%rip) # 0x2c945b
28: fb sti
29: f4 hlt
* 2a: fa cli <-- trapping instruction
2b: c3 ret
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
37: 00 00 00 00
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop