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BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user include/linux/instrumented.h:118 [inline]
BUG: KASAN: slab-out-of-bounds in _copy_to_user lib/usercopy.c:32 [inline]
BUG: KASAN: slab-out-of-bounds in _copy_to_user+0xc7/0x150 lib/usercopy.c:26
Read of size 42 at addr ffff888028e61280 by task syz-executor.1/9612

CPU: 0 PID: 9612 Comm: syz-executor.1 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256
 __kasan_report mm/kasan/report.c:442 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 instrument_copy_to_user include/linux/instrumented.h:118 [inline]
 _copy_to_user lib/usercopy.c:32 [inline]
 _copy_to_user+0xc7/0x150 lib/usercopy.c:26
 copy_to_user include/linux/uaccess.h:200 [inline]
 __htab_map_lookup_and_delete_batch+0xf19/0x1900 kernel/bpf/hashtab.c:1768
 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4179
 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4650
 __do_sys_bpf kernel/bpf/syscall.c:4694 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4692 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4692
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb5fd98cae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb5faee1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fb5fdaa0020 RCX: 00007fb5fd98cae9
RDX: 0000000000000038 RSI: 0000000020000080 RDI: 0000000000000019
RBP: 00007fb5fd9e6f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdec6831ef R14: 00007fb5faee1300 R15: 0000000000022000

Allocated by task 9612:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 ____kasan_kmalloc mm/kasan/common.c:472 [inline]
 __kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x61/0x120 mm/util.c:587
 kvmalloc include/linux/mm.h:805 [inline]
 kvmalloc_array include/linux/mm.h:823 [inline]
 __htab_map_lookup_and_delete_batch+0x525/0x1900 kernel/bpf/hashtab.c:1647
 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4179
 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4650
 __do_sys_bpf kernel/bpf/syscall.c:4694 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4692 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4692
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0xe9/0x110 mm/kasan/generic.c:348
 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3552
 fib_notifier_ops_unregister+0xf9/0x140 net/core/fib_notifier.c:167
 ip6mr_notifier_exit net/ipv6/ip6mr.c:1297 [inline]
 ip6mr_net_exit+0x9f/0x100 net/ipv6/ip6mr.c:1344
 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
 setup_net+0x639/0xa30 net/core/net_namespace.c:349
 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
 ksys_unshare+0x445/0x920 kernel/fork.c:3077
 __do_sys_unshare kernel/fork.c:3151 [inline]
 __se_sys_unshare kernel/fork.c:3149 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3149
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff888028e61280
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff888028e61280, ffff888028e612c0)
The buggy address belongs to the page:
page:ffffea0000a39840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28e61
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001bef700 0000001100000011 ffff888010c41640
raw: 0000000000000000 0000000080200020 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 154, ts 150972373777, free_ts 148663259735
 prep_new_page mm/page_alloc.c:2424 [inline]
 get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4153
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5375
 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
 alloc_slab_page mm/slub.c:1770 [inline]
 allocate_slab mm/slub.c:1907 [inline]
 new_slab+0x319/0x490 mm/slub.c:1970
 ___slab_alloc+0x950/0x1050 mm/slub.c:3001
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3088
 slab_alloc_node mm/slub.c:3179 [inline]
 __kmalloc_node+0x2d2/0x370 mm/slub.c:4444
 kmalloc_node include/linux/slab.h:614 [inline]
 __vmalloc_area_node mm/vmalloc.c:2903 [inline]
 __vmalloc_node_range+0x5ec/0x9e0 mm/vmalloc.c:3020
 alloc_thread_stack_node kernel/fork.c:245 [inline]
 dup_task_struct kernel/fork.c:887 [inline]
 copy_process+0x926/0x7590 kernel/fork.c:2026
 kernel_clone+0xe7/0xac0 kernel/fork.c:2584
 kernel_thread+0xb5/0xf0 kernel/fork.c:2636
 call_usermodehelper_exec_work kernel/umh.c:174 [inline]
 call_usermodehelper_exec_work+0xcc/0x180 kernel/umh.c:160
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1338 [inline]
 free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1389
 free_unref_page_prepare mm/page_alloc.c:3315 [inline]
 free_unref_page_list+0x1a9/0xfa0 mm/page_alloc.c:3431
 release_pages+0x830/0x20b0 mm/swap.c:963
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu mm/mmu_gather.c:249 [inline]
 tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:340
 exit_mmap+0x1ea/0x630 mm/mmap.c:3173
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 free_bprm+0x65/0x2e0 fs/exec.c:1483
 kernel_execve+0x380/0x460 fs/exec.c:1980
 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff888028e61180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888028e61200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888028e61280: 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888028e61300: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff888028e61380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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