======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc1-syzkaller-00371-g65fb414c93f4 #0 Not tainted
------------------------------------------------------
syz-executor/13835 is trying to acquire lock:
ffff8880542aba00 (&trie->lock){..-.}-{3:3}, at: trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:462

but task is already holding lock:
ffff88801ac409d8 (&n->list_lock){-.-.}-{3:3}, at: __put_partials+0x61/0x130 mm/slub.c:3122

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&n->list_lock){-.-.}-{3:3}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       get_partial_node+0x36/0x2a0 mm/slub.c:2823
       get_partial mm/slub.c:2937 [inline]
       ___slab_alloc+0xc17/0x14b0 mm/slub.c:3795
       __slab_alloc+0x58/0xa0 mm/slub.c:3905
       __slab_alloc_node mm/slub.c:3980 [inline]
       slab_alloc_node mm/slub.c:4141 [inline]
       __do_kmalloc_node mm/slub.c:4282 [inline]
       __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4289
       kmalloc_node_noprof include/linux/slab.h:928 [inline]
       bpf_map_kmalloc_node+0xd3/0x1c0 kernel/bpf/syscall.c:511
       lpm_trie_node_alloc kernel/bpf/lpm_trie.c:299 [inline]
       trie_update_elem+0x834/0xc00 kernel/bpf/lpm_trie.c:409
       bpf_map_update_value+0x533/0x5c0 kernel/bpf/syscall.c:289
       generic_map_update_batch+0x60d/0x900 kernel/bpf/syscall.c:1950
       bpf_map_do_batch+0x39a/0x660 kernel/bpf/syscall.c:5298
       __sys_bpf+0x377/0x810
       __do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
       __se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
       __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&trie->lock){..-.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3161 [inline]
       check_prevs_add kernel/locking/lockdep.c:3280 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
       __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:462
       bpf_prog_1c0c44170264bb34+0x46/0x4a
       bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
       __bpf_prog_run include/linux/filter.h:701 [inline]
       bpf_prog_run include/linux/filter.h:708 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2351 [inline]
       bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2392
       trace_contention_end+0x118/0x140 include/trace/events/lock.h:122
       __pv_queued_spin_lock_slowpath+0xb7e/0xdb0 kernel/locking/qspinlock.c:557
       pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [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+0x272/0x370 kernel/locking/spinlock_debug.c:116
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
       _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162
       __put_partials+0x61/0x130 mm/slub.c:3122
       put_cpu_partial+0x17c/0x250 mm/slub.c:3217
       __slab_free+0x2ea/0x3d0 mm/slub.c:4468
       qlink_free mm/kasan/quarantine.c:163 [inline]
       qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
       kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
       __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
       kasan_slab_alloc include/linux/kasan.h:250 [inline]
       slab_post_alloc_hook mm/slub.c:4104 [inline]
       slab_alloc_node mm/slub.c:4153 [inline]
       kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160
       ptlock_alloc+0x20/0x70 mm/memory.c:6953
       ptlock_init include/linux/mm.h:2970 [inline]
       pagetable_pte_ctor include/linux/mm.h:2997 [inline]
       __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
       pte_alloc_one+0xd3/0x610 arch/x86/mm/pgtable.c:33
       __pte_alloc+0x79/0x3c0 mm/memory.c:446
       copy_pte_range mm/memory.c:1106 [inline]
       copy_pmd_range+0x7696/0x7eb0 mm/memory.c:1261
       copy_pud_range mm/memory.c:1298 [inline]
       copy_p4d_range mm/memory.c:1322 [inline]
       copy_page_range+0x99f/0xe90 mm/memory.c:1420
       dup_mmap kernel/fork.c:751 [inline]
       dup_mm kernel/fork.c:1695 [inline]
       copy_mm+0x11c7/0x1f90 kernel/fork.c:1744
       copy_process+0x1845/0x3d50 kernel/fork.c:2395
       kernel_clone+0x226/0x8e0 kernel/fork.c:2807
       __do_sys_clone kernel/fork.c:2950 [inline]
       __se_sys_clone kernel/fork.c:2934 [inline]
       __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2934
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&n->list_lock);
                               lock(&trie->lock);
                               lock(&n->list_lock);
  lock(&trie->lock);

 *** DEADLOCK ***

6 locks held by syz-executor/13835:
 #0: ffffffff8e9eb5d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap kernel/fork.c:642 [inline]
 #0: ffffffff8e9eb5d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1695 [inline]
 #0: ffffffff8e9eb5d0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x27f/0x1f90 kernel/fork.c:1744
 #1: ffff888028a259a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
 #1: ffff888028a259a0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap kernel/fork.c:643 [inline]
 #1: ffff888028a259a0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mm kernel/fork.c:1695 [inline]
 #1: ffff888028a259a0 (&mm->mmap_lock){++++}-{4:4}, at: copy_mm+0x29d/0x1f90 kernel/fork.c:1744
 #2: ffff88807a5dbc60 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:113 [inline]
 #2: ffff88807a5dbc60 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap kernel/fork.c:652 [inline]
 #2: ffff88807a5dbc60 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mm kernel/fork.c:1695 [inline]
 #2: ffff88807a5dbc60 (&mm->mmap_lock/1){+.+.}-{4:4}, at: copy_mm+0x3df/0x1f90 kernel/fork.c:1744
 #3: ffffffff8ea4d948 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
 #3: ffffffff8ea4d948 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x27/0x60 include/linux/srcu.h:249
 #4: ffff88801ac409d8 (&n->list_lock){-.-.}-{3:3}, at: __put_partials+0x61/0x130 mm/slub.c:3122
 #5: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #5: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2350 [inline]
 #5: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2392

stack backtrace:
CPU: 0 UID: 0 PID: 13835 Comm: syz-executor Not tainted 6.13.0-rc1-syzkaller-00371-g65fb414c93f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
 check_prev_add kernel/locking/lockdep.c:3161 [inline]
 check_prevs_add kernel/locking/lockdep.c:3280 [inline]
 validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:462
 bpf_prog_1c0c44170264bb34+0x46/0x4a
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2351 [inline]
 bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2392
 trace_contention_end+0x118/0x140 include/trace/events/lock.h:122
 __pv_queued_spin_lock_slowpath+0xb7e/0xdb0 kernel/locking/qspinlock.c:557
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [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+0x272/0x370 kernel/locking/spinlock_debug.c:116
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162
 __put_partials+0x61/0x130 mm/slub.c:3122
 put_cpu_partial+0x17c/0x250 mm/slub.c:3217
 __slab_free+0x2ea/0x3d0 mm/slub.c:4468
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4104 [inline]
 slab_alloc_node mm/slub.c:4153 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160
 ptlock_alloc+0x20/0x70 mm/memory.c:6953
 ptlock_init include/linux/mm.h:2970 [inline]
 pagetable_pte_ctor include/linux/mm.h:2997 [inline]
 __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
 pte_alloc_one+0xd3/0x610 arch/x86/mm/pgtable.c:33
 __pte_alloc+0x79/0x3c0 mm/memory.c:446
 copy_pte_range mm/memory.c:1106 [inline]
 copy_pmd_range+0x7696/0x7eb0 mm/memory.c:1261
 copy_pud_range mm/memory.c:1298 [inline]
 copy_p4d_range mm/memory.c:1322 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1420
 dup_mmap kernel/fork.c:751 [inline]
 dup_mm kernel/fork.c:1695 [inline]
 copy_mm+0x11c7/0x1f90 kernel/fork.c:1744
 copy_process+0x1845/0x3d50 kernel/fork.c:2395
 kernel_clone+0x226/0x8e0 kernel/fork.c:2807
 __do_sys_clone kernel/fork.c:2950 [inline]
 __se_sys_clone kernel/fork.c:2934 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2934
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb823576793
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd385c0b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb823576793
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000555565f027d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000485d3 R14: 00000000000485a1 R15: 00007ffd385c0cf0
 </TASK>