BUG: MAX_LOCK_DEPTH too low!
turning off the locking correctness validator.
depth: 48 max: 48!
48 locks held by syz.9.3498/20128:
#0: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#1: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:313
#2: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#3: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#4: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#5: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#6: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#7: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#8: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#9: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#10: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#11: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#12: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#13: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#14: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#15: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#16: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#17: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#18: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#19: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#20: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#21: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#22: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#23: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#24: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#25: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#26: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#27: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#28: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#29: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#30: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#31: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#32: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#33: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#34: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#35: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#36: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#37: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#38: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#39: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#40: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#41: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#42: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#43: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#44: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#45: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
#46: ffff8880b912a258 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_interrupt+0xf7/0x8b0 kernel/time/hrtimer.c:1792
#47: ffffffff8c331748 (tk_core.seq.seqcount){----}-{0:0}, at: ktime_get_update_offsets_now+0x44/0x3e0 kernel/time/timekeeping.c:2300
INFO: lockdep is turned off.
CPU: 1 PID: 20128 Comm: syz.9.3498 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
__lock_acquire+0x1247/0x7b50 kernel/locking/lockdep.c:-1
lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
seqcount_lockdep_reader_access+0xcd/0x1d0 include/linux/seqlock.h:103
ktime_get_update_offsets_now+0x44/0x3e0 kernel/time/timekeeping.c:2300
hrtimer_update_base kernel/time/hrtimer.c:621 [inline]
hrtimer_interrupt+0x121/0x8b0 kernel/time/hrtimer.c:1793
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:rmqueue_pcplist mm/page_alloc.c:3711 [inline]
RIP: 0010:rmqueue mm/page_alloc.c:3742 [inline]
RIP: 0010:get_page_from_freelist+0x1f20/0x2670 mm/page_alloc.c:4189
Code: 8f 84 24 c0 01 00 00 f7 84 24 c0 01 00 00 00 02 00 00 c6 44 08 04 f8 0f 85 89 02 00 00 41 f7 c5 00 02 00 00 74 01 fb 4d 85 f6 <44> 8b 6c 24 2c 0f 84 d5 00 00 00 4c 89 f0 48 c1 e8 03 80 3c 08 00
RSP: 0018:ffffc90002e4e620 EFLAGS: 00000286
RAX: 1ffff920005c9cf8 RBX: ffffffff8be3d828 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a43c0
RBP: ffffc90002e4e870 R08: ffffffff8d8b0eef R09: 1ffffffff1b161dd
R10: dffffc0000000000 R11: fffffbfff1b161de R12: ffff88813fffd310
R13: 0000000000000202 R14: ffffea0000bca000 R15: 0000000000102a20
__alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
stack_depot_save+0x356/0x460 lib/stackdepot.c:302
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc+0xc6/0xe0 mm/kasan/common.c:522
kmalloc_array include/linux/slab.h:647 [inline]
kcalloc include/linux/slab.h:676 [inline]
rpl_do_srh_inline net/ipv6/rpl_iptunnel.c:140 [inline]
rpl_do_srh+0x1c5/0xe50 net/ipv6/rpl_iptunnel.c:201
rpl_input+0xfa/0xab0 net/ipv6/rpl_iptunnel.c:279
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
lwtunnel_input+0x26b/0x430 net/core/lwtunnel.c:411
NF_HOOK+0x303/0x390 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5551 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5665
netif_receive_skb_internal net/core/dev.c:5751 [inline]
netif_receive_skb+0x19e/0x700 net/core/dev.c:5810
tun_rx_batched+0x606/0x760 drivers/net/tun.c:-1
tun_get_user+0x25bf/0x3b60 drivers/net/tun.c:1989
tun_chr_write_iter+0x112/0x1e0 drivers/net/tun.c:2019
call_write_iter include/linux/fs.h:2179 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x748/0xd70 fs/read_write.c:594
ksys_write+0x153/0x260 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe20422398e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fe2024bafb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe2024bb6c0 RCX: 00007fe20422398e
RDX: 000000000000004a RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe2042fa024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe2044eb038 R14: 00007fe2044eafa0 R15: 00007ffd6d7fb778
----------------
Code disassembly (best guess):
0: 8f 84 24 c0 01 00 00 pop 0x1c0(%rsp)
7: f7 84 24 c0 01 00 00 testl $0x200,0x1c0(%rsp)
e: 00 02 00 00
12: c6 44 08 04 f8 movb $0xf8,0x4(%rax,%rcx,1)
17: 0f 85 89 02 00 00 jne 0x2a6
1d: 41 f7 c5 00 02 00 00 test $0x200,%r13d
24: 74 01 je 0x27
26: fb sti
27: 4d 85 f6 test %r14,%r14
* 2a: 44 8b 6c 24 2c mov 0x2c(%rsp),%r13d <-- trapping instruction
2f: 0f 84 d5 00 00 00 je 0x10a
35: 4c 89 f0 mov %r14,%rax
38: 48 c1 e8 03 shr $0x3,%rax
3c: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)