======================================================
WARNING: possible circular locking dependency detected
6.1.130-syzkaller #0 Not tainted
------------------------------------------------------
syz.1.91/4640 is trying to acquire lock:
ffff88813fffacd8 (&zone->lock){-.-.}-{2:2}, at: rmqueue_bulk mm/page_alloc.c:3131 [inline]
ffff88813fffacd8 (&zone->lock){-.-.}-{2:2}, at: __rmqueue_pcplist+0x2ac/0x2310 mm/page_alloc.c:3785
but task is already holding lock:
ffff888053a4f238 (&trie->lock){-.-.}-{2:2}, at: trie_update_elem+0xc6/0xdc0 kernel/bpf/lpm_trie.c:335
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&trie->lock){-.-.}-{2:2}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
trie_delete_elem+0x90/0x690 kernel/bpf/lpm_trie.c:467
0xffffffffa000205a
bpf_dispatcher_nop_func include/linux/bpf.h:1000 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2284 [inline]
bpf_trace_run2+0x1fd/0x410 kernel/trace/bpf_trace.c:2323
trace_contention_end+0x14c/0x190 include/trace/events/lock.h:122
__pv_queued_spin_lock_slowpath+0x935/0xc50 kernel/locking/qspinlock.c:560
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x269/0x370 kernel/locking/spinlock_debug.c:115
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0xdd/0x120 kernel/locking/spinlock.c:162
rmqueue_bulk mm/page_alloc.c:3131 [inline]
__rmqueue_pcplist+0x2ac/0x2310 mm/page_alloc.c:3785
rmqueue_pcplist mm/page_alloc.c:3827 [inline]
rmqueue mm/page_alloc.c:3870 [inline]
get_page_from_freelist+0x880/0x38d0 mm/page_alloc.c:4325
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5605
__pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
pte_alloc_one+0x86/0x360 arch/x86/mm/pgtable.c:33
__pte_alloc+0x75/0x220 mm/memory.c:468
copy_pte_range mm/memory.c:1042 [inline]
copy_pmd_range mm/memory.c:1177 [inline]
copy_pud_range mm/memory.c:1214 [inline]
copy_p4d_range mm/memory.c:1238 [inline]
copy_page_range+0x3e3e/0x4660 mm/memory.c:1336
dup_mmap kernel/fork.c:697 [inline]
dup_mm kernel/fork.c:1541 [inline]
copy_mm+0xf42/0x1990 kernel/fork.c:1590
copy_process+0x19fb/0x40a0 kernel/fork.c:2266
kernel_clone+0x222/0x920 kernel/fork.c:2681
__do_sys_clone kernel/fork.c:2822 [inline]
__se_sys_clone kernel/fork.c:2806 [inline]
__x64_sys_clone+0x242/0x2c0 kernel/fork.c:2806
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #0 (&zone->lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
rmqueue_bulk mm/page_alloc.c:3131 [inline]
__rmqueue_pcplist+0x2ac/0x2310 mm/page_alloc.c:3785
rmqueue_pcplist mm/page_alloc.c:3827 [inline]
rmqueue mm/page_alloc.c:3870 [inline]
get_page_from_freelist+0x880/0x38d0 mm/page_alloc.c:4325
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5605
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
__kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437
__do_kmalloc_node mm/slab_common.c:935 [inline]
__kmalloc_node+0xa2/0x230 mm/slab_common.c:943
kmalloc_node include/linux/slab.h:589 [inline]
bpf_map_kmalloc_node+0xce/0x1c0 kernel/bpf/syscall.c:452
lpm_trie_node_alloc kernel/bpf/lpm_trie.c:291 [inline]
trie_update_elem+0x175/0xdc0 kernel/bpf/lpm_trie.c:338
bpf_map_update_value+0x5cf/0x6f0 kernel/bpf/syscall.c:226
generic_map_update_batch+0x579/0x920 kernel/bpf/syscall.c:1699
bpf_map_do_batch+0x4d0/0x620
__sys_bpf+0x658/0x6c0
__do_sys_bpf kernel/bpf/syscall.c:5121 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5119 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5119
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&trie->lock);
lock(&zone->lock);
lock(&trie->lock);
lock(&zone->lock);
*** DEADLOCK ***
3 locks held by syz.1.91/4640:
#0: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32e680 (rcu_read_lock){....}-{1:2}, at: bpf_map_update_value+0x207/0x6f0 kernel/bpf/syscall.c:225
#1: ffff888053a4f238 (&trie->lock){-.-.}-{2:2}, at: trie_update_elem+0xc6/0xdc0 kernel/bpf/lpm_trie.c:335
#2: ffff8880b8f41198 (&pcp->lock){+.+.}-{2:2}, at: spin_trylock include/linux/spinlock.h:361 [inline]
#2: ffff8880b8f41198 (&pcp->lock){+.+.}-{2:2}, at: rmqueue_pcplist mm/page_alloc.c:3814 [inline]
#2: ffff8880b8f41198 (&pcp->lock){+.+.}-{2:2}, at: rmqueue mm/page_alloc.c:3870 [inline]
#2: ffff8880b8f41198 (&pcp->lock){+.+.}-{2:2}, at: get_page_from_freelist+0x7c2/0x38d0 mm/page_alloc.c:4325
stack backtrace:
CPU: 1 PID: 4640 Comm: syz.1.91 Not tainted 6.1.130-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
rmqueue_bulk mm/page_alloc.c:3131 [inline]
__rmqueue_pcplist+0x2ac/0x2310 mm/page_alloc.c:3785
rmqueue_pcplist mm/page_alloc.c:3827 [inline]
rmqueue mm/page_alloc.c:3870 [inline]
get_page_from_freelist+0x880/0x38d0 mm/page_alloc.c:4325
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5605
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
__kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437
__do_kmalloc_node mm/slab_common.c:935 [inline]
__kmalloc_node+0xa2/0x230 mm/slab_common.c:943
kmalloc_node include/linux/slab.h:589 [inline]
bpf_map_kmalloc_node+0xce/0x1c0 kernel/bpf/syscall.c:452
lpm_trie_node_alloc kernel/bpf/lpm_trie.c:291 [inline]
trie_update_elem+0x175/0xdc0 kernel/bpf/lpm_trie.c:338
bpf_map_update_value+0x5cf/0x6f0 kernel/bpf/syscall.c:226
generic_map_update_batch+0x579/0x920 kernel/bpf/syscall.c:1699
bpf_map_do_batch+0x4d0/0x620
__sys_bpf+0x658/0x6c0
__do_sys_bpf kernel/bpf/syscall.c:5121 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5119 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5119
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd91e58d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd91f316038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd91e7a5fa0 RCX: 00007fd91e58d169
RDX: 0000000000000038 RSI: 0000400000000000 RDI: 000000000000001a
RBP: 00007fd91e60e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd91e7a5fa0 R15: 00007ffea3153358
</TASK>