============================================
WARNING: possible recursive locking detected
6.8.0-syzkaller-05243-g14bb1e8c8d4a #0 Not tainted
--------------------------------------------
syz-executor202/5071 is trying to acquire lock:
ffff888029ce79f8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:459

but task is already holding lock:
ffff8880229b29f8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:459

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&trie->lock);
  lock(&trie->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by syz-executor202/5071:
 #0: ffff888022adb520 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open kernel/events/core.c:12555 [inline]
 #0: ffff888022adb520 (&sig->exec_update_lock){++++}-{3:3}, at: __se_sys_perf_event_open+0xe6d/0x38d0 kernel/events/core.c:12416
 #1: ffff888024cd5088 (&child->perf_event_mutex){+.+.}-{3:3}, at: find_get_context+0x11c/0x5f0 kernel/events/core.c:4817
 #2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2395 [inline]
 #2: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x530 kernel/trace/bpf_trace.c:2437
 #3: ffff8880229b29f8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:459
 #4: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #4: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #4: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2395 [inline]
 #4: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x530 kernel/trace/bpf_trace.c:2437

stack backtrace:
CPU: 0 PID: 5071 Comm: syz-executor202 Not tainted 6.8.0-syzkaller-05243-g14bb1e8c8d4a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 check_deadlock kernel/locking/lockdep.c:3062 [inline]
 validate_chain+0x15c1/0x58e0 kernel/locking/lockdep.c:3856
 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
 __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:459
 </TASK>
==================================================================
BUG: KASAN: slab-use-after-free in __bpf_trace_run kernel/trace/bpf_trace.c:2382 [inline]
BUG: KASAN: slab-use-after-free in bpf_trace_run2+0xfa/0x530 kernel/trace/bpf_trace.c:2437
Read of size 8 at addr ffff88802bb17c18 by task syz-executor202/5071

CPU: 0 PID: 5071 Comm: syz-executor202 Not tainted 6.8.0-syzkaller-05243-g14bb1e8c8d4a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 __bpf_trace_run kernel/trace/bpf_trace.c:2382 [inline]
 bpf_trace_run2+0xfa/0x530 kernel/trace/bpf_trace.c:2437
 __traceiter_contention_begin+0x7b/0xb0 include/trace/events/lock.h:95
 trace_contention_begin+0xf9/0x120 include/trace/events/lock.h:95
 __pv_queued_spin_lock_slowpath+0x115/0xc60 kernel/locking/qspinlock.c:405
 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
 trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:459
 bpf_prog_2c29ac5cdc6b1842+0x42/0x46
 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
 __bpf_prog_run include/linux/filter.h:667 [inline]
 bpf_prog_run include/linux/filter.h:674 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline]
 bpf_trace_run2+0x2ec/0x530 kernel/trace/bpf_trace.c:2437
 __traceiter_contention_begin+0x7b/0xb0 include/trace/events/lock.h:95
 trace_contention_begin+0xd7/0x100 include/trace/events/lock.h:95
 __mutex_lock_common kernel/locking/mutex.c:610 [inline]
 __mutex_lock+0x147/0xd70 kernel/locking/mutex.c:752
 find_get_context+0x11c/0x5f0 kernel/events/core.c:4817
 __do_sys_perf_event_open kernel/events/core.c:12573 [inline]
 __se_sys_perf_event_open+0x13d5/0x38d0 kernel/events/core.c:12416
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7ffa1c6b3069
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcda6a4408 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffa1c6b3069
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000000a0
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 5075:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 kmalloc_trace+0x1d9/0x360 mm/slub.c:4012
 kmalloc include/linux/slab.h:590 [inline]
 kzalloc include/linux/slab.h:711 [inline]
 bpf_raw_tp_link_attach+0x2a0/0x6e0 kernel/bpf/syscall.c:3816
 bpf_raw_tracepoint_open+0x1c2/0x240 kernel/bpf/syscall.c:3863
 __sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5673
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Freed by task 5075:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4299 [inline]
 kfree+0x14a/0x380 mm/slub.c:4409
 bpf_link_release+0x3b/0x50 kernel/bpf/syscall.c:3071
 __fput+0x429/0x8a0 fs/file_table.c:423
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa1b/0x27e0 kernel/exit.c:878
 do_group_exit+0x207/0x2c0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

The buggy address belongs to the object at ffff88802bb17c00
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
 freed 128-byte region [ffff88802bb17c00, ffff88802bb17c80)

The buggy address belongs to the physical page:
page:ffffea0000aec5c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bb17
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888014c418c0 ffffea00008d1400 0000000000000002
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 4522, tgid 4522 (udevd), ts 35854687295, free_ts 35329759063
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x256/0x680 mm/page_alloc.c:4569
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page+0x5f/0x160 mm/slub.c:2190
 allocate_slab mm/slub.c:2354 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2407
 ___slab_alloc+0xd1b/0x13e0 mm/slub.c:3540
 __slab_alloc mm/slub.c:3625 [inline]
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmalloc_trace+0x267/0x360 mm/slub.c:4007
 kmalloc include/linux/slab.h:590 [inline]
 kzalloc include/linux/slab.h:711 [inline]
 kernfs_get_open_node fs/kernfs/file.c:523 [inline]
 kernfs_fop_open+0x803/0xcd0 fs/kernfs/file.c:691
 do_dentry_open+0x907/0x15a0 fs/open.c:956
 do_open fs/namei.c:3643 [inline]
 path_openat+0x2860/0x3240 fs/namei.c:3800
 do_filp_open+0x235/0x490 fs/namei.c:3827
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_openat fs/open.c:1438 [inline]
 __se_sys_openat fs/open.c:1433 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1433
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
page last free pid 4526 tgid 4526 stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
 discard_slab mm/slub.c:2453 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:2922
 put_cpu_partial+0x17c/0x250 mm/slub.c:2997
 __slab_free+0x302/0x410 mm/slub.c:4166
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 __do_kmalloc_node mm/slub.c:3980 [inline]
 __kmalloc_node_track_caller+0x1fb/0x4e0 mm/slub.c:4001
 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:599
 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1318 [inline]
 alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6504
 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2795
 unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:2019
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 sock_write_iter+0x2dd/0x400 net/socket.c:1160

Memory state around the buggy address:
 ffff88802bb17b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802bb17b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802bb17c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff88802bb17c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802bb17d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 05 fc
==================================================================