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BUG: KASAN: slab-out-of-bounds in instrument_copy_from_user_before include/linux/instrumented.h:129 [inline]
BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x7b/0xe0 lib/usercopy.c:22
Write of size 36 at addr ffff888025808688 by task syz-executor.0/7128

CPU: 0 PID: 7128 Comm: syz-executor.0 Not tainted 6.9.0-rc2-next-20240402-syzkaller #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+0x241/0x360 lib/dump_stack.c:114
 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
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 instrument_copy_from_user_before include/linux/instrumented.h:129 [inline]
 _copy_from_user+0x7b/0xe0 lib/usercopy.c:22
 copy_from_user include/linux/uaccess.h:183 [inline]
 handle_to_path fs/fhandle.c:203 [inline]
 do_handle_open+0x204/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7fd70e47dde9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd70f1f80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007fd70e5ac050 RCX: 00007fd70e47dde9
RDX: 0000000000000000 RSI: 0000000020002200 RDI: 0000000000000004
RBP: 00007fd70e4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fd70e5ac050 R15: 00007ffe0582ef98
 </TASK>

Allocated by task 7128:
 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]
 __do_kmalloc_node mm/slub.c:4048 [inline]
 __kmalloc_noprof+0x200/0x410 mm/slub.c:4061
 kmalloc_noprof include/linux/slab.h:664 [inline]
 handle_to_path fs/fhandle.c:195 [inline]
 do_handle_open+0x162/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

The buggy address belongs to the object at ffff888025808680
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 8 bytes inside of
 allocated 36-byte region [ffff888025808680, ffff8880258086a4)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25808
ksm flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffefff(slab)
raw: 00fff80000000000 ffff888015041640 ffffea0000bb2f40 dead000000000003
raw: 0000000000000000 0000000080200020 00000001ffffefff 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 62, tgid 1808524435 (kworker/u8:4), ts 62, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1490
 prep_new_page mm/page_alloc.c:1498 [inline]
 get_page_from_freelist+0x2e7e/0x2f40 mm/page_alloc.c:3454
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4712
 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:271 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2249
 allocate_slab+0x5a/0x2e0 mm/slub.c:2412
 new_slab mm/slub.c:2465 [inline]
 ___slab_alloc+0xea8/0x1430 mm/slub.c:3599
 __slab_alloc+0x58/0xa0 mm/slub.c:3684
 __slab_alloc_node mm/slub.c:3737 [inline]
 slab_alloc_node mm/slub.c:3915 [inline]
 kmalloc_node_trace_noprof+0x20c/0x300 mm/slub.c:4087
 kmalloc_node_noprof include/linux/slab.h:677 [inline]
 __get_vm_area_node+0x11a/0x280 mm/vmalloc.c:3084
 __vmalloc_node_range_noprof+0x3df/0x1490 mm/vmalloc.c:3777
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1114
 copy_process+0x5d1/0x3dc0 kernel/fork.c:2219
 kernel_clone+0x226/0x8f0 kernel/fork.c:2796
 user_mode_thread+0x132/0x1a0 kernel/fork.c:2874
 call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:172
 process_one_work kernel/workqueue.c:3218 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888025808580: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff888025808600: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff888025808680: 00 00 00 00 04 fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888025808700: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff888025808780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
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