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BUG: KASAN: use-after-free in get_kprobe kernel/kprobes.c:372 [inline]
BUG: KASAN: use-after-free in get_optimized_kprobe+0x184/0x1c0 kernel/kprobes.c:489
Read of size 8 at addr ffff8880486edb28 by task syz-executor.2/10041

CPU: 0 PID: 10041 Comm: syz-executor.2 Not tainted 5.10.96 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 print_address_description.constprop.0+0x1c/0x210 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report.cold+0x37/0x7c mm/kasan/report.c:562
 get_kprobe kernel/kprobes.c:372 [inline]
 get_optimized_kprobe+0x184/0x1c0 kernel/kprobes.c:489
 __disarm_kprobe+0x80/0x120 kernel/kprobes.c:978
 disarm_kprobe kernel/kprobes.c:1154 [inline]
 __disable_kprobe+0x235/0x350 kernel/kprobes.c:1793
 disable_kprobe+0x25/0x70 kernel/kprobes.c:2299
 __disable_trace_kprobe+0xef/0x180 kernel/trace/trace_kprobe.c:344
 disable_trace_kprobe+0x231/0x2d0 kernel/trace/trace_kprobe.c:422
 kprobe_register+0x61/0xb0 kernel/trace/trace_kprobe.c:1713
 perf_trace_event_unreg.isra.0+0xb0/0x210 kernel/trace/trace_event_perf.c:162
 perf_kprobe_destroy+0xc0/0x130 kernel/trace/trace_event_perf.c:294
 _free_event+0x159/0xc70 kernel/events/core.c:4951
 put_event kernel/events/core.c:5045 [inline]
 perf_event_release_kernel+0x899/0xc20 kernel/events/core.c:5160
 perf_release+0x33/0x40 kernel/events/core.c:5170
 __fput+0x285/0x980 fs/file_table.c:281
 task_work_run+0xe2/0x1a0 kernel/task_work.c:151
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:164 [inline]
 exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f2bd9d0172b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffe6ae60fc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f2bd9d0172b
RDX: 00007f2bd9e677d0 RSI: 0000000000000081 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f2bd9e677d0
R13: 00007ffe6ae610e0 R14: 00007f2bd9e61f60 R15: 000000000011fcbd

Allocated by task 10043:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 alloc_aggr_kprobe+0x41/0x190 kernel/kprobes.c:822
 try_to_optimize_kprobe kernel/kprobes.c:853 [inline]
 register_kprobe kernel/kprobes.c:1740 [inline]
 register_kprobe+0xb78/0x1330 kernel/kprobes.c:1682
 __register_trace_kprobe kernel/trace/trace_kprobe.c:514 [inline]
 __register_trace_kprobe+0x262/0x2d0 kernel/trace/trace_kprobe.c:482
 create_local_trace_kprobe+0x1e6/0x3b0 kernel/trace/trace_kprobe.c:1840
 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:272
 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9655
 perf_try_init_event+0x130/0x570 kernel/events/core.c:11033
 perf_init_event kernel/events/core.c:11085 [inline]
 perf_event_alloc.part.0+0xd96/0x2b30 kernel/events/core.c:11363
 perf_event_alloc kernel/events/core.c:11742 [inline]
 __do_sys_perf_event_open+0x57c/0x2d00 kernel/events/core.c:11840
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 67:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
 __kasan_slab_free+0x110/0x150 mm/kasan/common.c:422
 slab_free_hook mm/slub.c:1542 [inline]
 slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576
 slab_free mm/slub.c:3149 [inline]
 kfree+0xd7/0x380 mm/slub.c:4125
 free_aggr_kprobe kernel/kprobes.c:434 [inline]
 do_free_cleaned_kprobes kernel/kprobes.c:586 [inline]
 kprobe_optimizer+0x56f/0x7e0 kernel/kprobes.c:624
 process_one_work+0x9a9/0x1590 kernel/workqueue.c:2279
 worker_thread+0x61d/0x1310 kernel/workqueue.c:2425
 kthread+0x38f/0x470 kernel/kthread.c:313
 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296

The buggy address belongs to the object at ffff8880486edb00
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 40 bytes inside of
 192-byte region [ffff8880486edb00, ffff8880486edbc0)
The buggy address belongs to the page:
page:00000000c4433318 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x486ed
flags: 0x100000000000200(slab)
raw: 0100000000000200 ffffea00010d9d80 0000000400000004 ffff888007c41500
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880486eda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880486eda80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff8880486edb00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff8880486edb80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8880486edc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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