==================================================================
BUG: KASAN: use-after-free in tracing_open_file_tr+0x18a/0x330 kernel/trace/trace.c:4904
Read of size 8 at addr ffff88810e179d68 by task syz-executor336/612

CPU: 1 PID: 612 Comm: syz-executor336 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
 tracing_open_file_tr+0x18a/0x330 kernel/trace/trace.c:4904
 do_dentry_open+0x885/0x11f0 fs/open.c:884
 vfs_open+0x73/0x80 fs/open.c:1017
 do_open fs/namei.c:3633 [inline]
 path_openat+0x2699/0x2f30 fs/namei.c:3790
 do_filp_open+0x374/0x420 fs/namei.c:3819
 do_sys_openat2+0x15e/0x820 fs/open.c:1343
 do_sys_open fs/open.c:1359 [inline]
 __do_sys_openat fs/open.c:1375 [inline]
 __se_sys_openat fs/open.c:1370 [inline]
 __x64_sys_openat+0x136/0x160 fs/open.c:1370
 x64_sys_call+0x783/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fefe34b36b9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe49fd44a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6e69636172742f2e RCX: 00007fefe34b36b9
RDX: 0000000000000001 RSI: 0000200000000800 RDI: 00000000ffffff9c
RBP: 00000000000f4240 R08: 0000000000000009 R09: 0000000000000009
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000008a3b
R13: 00007ffe49fd44bc R14: 00007ffe49fd44d0 R15: 00007ffe49fd44c0
 </TASK>

Allocated by task 612:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x72/0x80 mm/kasan/common.c:334
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3382 [inline]
 slab_alloc mm/slub.c:3392 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3399 [inline]
 kmem_cache_alloc+0x166/0x320 mm/slub.c:3408
 trace_create_new_event+0x8c/0x3a0 kernel/trace/trace_events.c:2951
 __trace_add_new_event kernel/trace/trace_events.c:2983 [inline]
 __add_event_to_tracers kernel/trace/trace_events.c:3709 [inline]
 trace_add_event_call+0x96/0x140 kernel/trace/trace_events.c:3024
 trace_probe_register_event_call+0x35a/0x3f0 kernel/trace/trace_probe.c:1138
 register_uprobe_event kernel/trace/trace_uprobe.c:1584 [inline]
 register_trace_uprobe+0x7e6/0x1190 kernel/trace/trace_uprobe.c:518
 __trace_uprobe_create+0xa41/0xbd0 kernel/trace/trace_uprobe.c:705
 trace_probe_create+0xd5/0x140 kernel/trace/trace_probe.c:1244
 trace_uprobe_create+0x1c/0x20 kernel/trace/trace_uprobe.c:725
 dyn_event_create+0x58/0x70 kernel/trace/trace_dynevent.c:137
 create_or_delete_trace_uprobe+0x69/0xa0 kernel/trace/trace_uprobe.c:735
 trace_parse_run_command+0x1c6/0x2e0 kernel/trace/trace.c:10258
 probes_write+0x34/0x40 kernel/trace/trace_uprobe.c:804
 vfs_write+0x3fb/0xd00 fs/read_write.c:582
 ksys_write+0x14a/0x260 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:646
 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 608:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1750 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
 slab_free mm/slub.c:3712 [inline]
 kmem_cache_free+0x12d/0x300 mm/slub.c:3737
 event_file_put+0xcf/0x150 kernel/trace/trace_events.c:-1
 remove_event_file_dir+0x400/0x4c0 kernel/trace/trace_events.c:1160
 remove_event_from_tracers kernel/trace/trace_events.c:2653 [inline]
 event_remove kernel/trace/trace_events.c:2688 [inline]
 __trace_remove_event_call+0x245/0x540 kernel/trace/trace_events.c:3037
 probe_remove_event_call kernel/trace/trace_events.c:3074 [inline]
 trace_remove_event_call+0x1d3/0x2b0 kernel/trace/trace_events.c:3094
 trace_probe_unregister_event_call kernel/trace/trace_probe.h:334 [inline]
 unregister_uprobe_event kernel/trace/trace_uprobe.c:1589 [inline]
 unregister_trace_uprobe kernel/trace/trace_uprobe.c:401 [inline]
 trace_uprobe_release+0x128/0x2b0 kernel/trace/trace_uprobe.c:743
 dyn_events_release_all+0x1c4/0x240 kernel/trace/trace_dynevent.c:227
 probes_open+0xbc/0x140 kernel/trace/trace_uprobe.c:793
 do_dentry_open+0x885/0x11f0 fs/open.c:884
 vfs_open+0x73/0x80 fs/open.c:1017
 do_open fs/namei.c:3633 [inline]
 path_openat+0x2699/0x2f30 fs/namei.c:3790
 do_filp_open+0x1ee/0x420 fs/namei.c:3817
 do_sys_openat2+0x15e/0x820 fs/open.c:1343
 do_sys_open fs/open.c:1359 [inline]
 __do_sys_openat fs/open.c:1375 [inline]
 __se_sys_openat fs/open.c:1370 [inline]
 __x64_sys_openat+0x136/0x160 fs/open.c:1370
 x64_sys_call+0x783/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88810e179d20
 which belongs to the cache trace_event_file of size 88
The buggy address is located 72 bytes inside of
 88-byte region [ffff88810e179d20, ffff88810e179d78)

The buggy address belongs to the physical page:
page:ffffea0004385e40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e179
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff88810004d500
raw: 0000000000000000 0000000080220022 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 565, tgid 565 (syz-executor336), ts 35254108454, free_ts 35251333446
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2673
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2680
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4587
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5931
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3e0 mm/slub.c:2020
 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 slab_alloc mm/slub.c:3392 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3399 [inline]
 kmem_cache_alloc+0x1a8/0x320 mm/slub.c:3408
 trace_create_new_event+0x8c/0x3a0 kernel/trace/trace_events.c:2951
 __trace_add_new_event kernel/trace/trace_events.c:2983 [inline]
 __add_event_to_tracers kernel/trace/trace_events.c:3709 [inline]
 trace_add_event_call+0x96/0x140 kernel/trace/trace_events.c:3024
 trace_probe_register_event_call+0x35a/0x3f0 kernel/trace/trace_probe.c:1138
 register_uprobe_event kernel/trace/trace_uprobe.c:1584 [inline]
 register_trace_uprobe+0x7e6/0x1190 kernel/trace/trace_uprobe.c:518
 __trace_uprobe_create+0xa41/0xbd0 kernel/trace/trace_uprobe.c:705
 trace_probe_create+0xd5/0x140 kernel/trace/trace_probe.c:1244
 trace_uprobe_create+0x1c/0x20 kernel/trace/trace_uprobe.c:725
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1581 [inline]
 free_pcp_prepare mm/page_alloc.c:1655 [inline]
 free_unref_page_prepare+0x81b/0x820 mm/page_alloc.c:3622
 free_unref_page_list+0x117/0x8d0 mm/page_alloc.c:3773
 release_pages+0xc7e/0xce0 mm/swap.c:1053
 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:316
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu mm/mmu_gather.c:261 [inline]
 tlb_finish_mmu+0x1b2/0x380 mm/mmu_gather.c:361
 exit_mmap+0x41d/0xc10 mm/mmap.c:3384
 __mmput+0x92/0x340 kernel/fork.c:1321
 mmput+0x4b/0x150 kernel/fork.c:1345
 exit_mm kernel/exit.c:575 [inline]
 do_exit+0xa62/0x29f0 kernel/exit.c:883
 do_group_exit+0x21b/0x2e0 kernel/exit.c:1040
 __do_sys_exit_group kernel/exit.c:1051 [inline]
 __se_sys_exit_group kernel/exit.c:1049 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1049
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff88810e179c00: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb
 ffff88810e179c80: fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb
>ffff88810e179d00: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fc
                                                          ^
 ffff88810e179d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fc fc
 ffff88810e179e00: fc fc fa fb fb fb fb fb fb fb fb fb fb fc fc fc
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