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BUG: KASAN: slab-out-of-bounds in btf_name_valid_section kernel/bpf/btf.c:824 [inline]
BUG: KASAN: slab-out-of-bounds in btf_datasec_check_meta+0x2c9/0x9a0 kernel/bpf/btf.c:4693
Read of size 1 at addr ffff88806237fd60 by task syz.4.2318/13143

CPU: 0 UID: 0 PID: 13143 Comm: syz.4.2318 Not tainted 6.11.0-rc4-syzkaller-00326-g5277d130947b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 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
 btf_name_valid_section kernel/bpf/btf.c:824 [inline]
 btf_datasec_check_meta+0x2c9/0x9a0 kernel/bpf/btf.c:4693
 btf_check_meta kernel/bpf/btf.c:5175 [inline]
 btf_check_all_metas kernel/bpf/btf.c:5199 [inline]
 btf_parse_type_sec+0x4d5/0x2620 kernel/bpf/btf.c:5335
 btf_parse kernel/bpf/btf.c:5763 [inline]
 btf_new_fd+0x43f/0xd30 kernel/bpf/btf.c:7683
 __sys_bpf+0x6ef/0x810 kernel/bpf/syscall.c:5762
 __do_sys_bpf kernel/bpf/syscall.c:5824 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5822 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5822
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc87a57def9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc87b39e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fc87a735f80 RCX: 00007fc87a57def9
RDX: 0000000000000028 RSI: 0000000020000340 RDI: 0000000000000012
RBP: 00007fc87a5f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc87a735f80 R15: 00007ffc71db4188
 </TASK>

Allocated by task 13143:
 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:4158 [inline]
 __kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4164
 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650
 btf_parse kernel/bpf/btf.c:5739 [inline]
 btf_new_fd+0x265/0xd30 kernel/bpf/btf.c:7683
 __sys_bpf+0x6ef/0x810 kernel/bpf/syscall.c:5762
 __do_sys_bpf kernel/bpf/syscall.c:5824 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5822 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5822
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88806237fc00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes to the right of
 allocated 352-byte region [ffff88806237fc00, ffff88806237fd60)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6237c
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff88801ac41c80 0000000000000000 0000000000000001
raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801ac41c80 0000000000000000 0000000000000001
head: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000
head: 00fff00000000002 ffffea000188df01 ffffffffffffffff 0000000000000000
head: ffff888000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 12778, tgid 12778 (syz-executor), ts 827738663273, free_ts 827712502757
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2321
 allocate_slab+0x5a/0x2f0 mm/slub.c:2484
 new_slab mm/slub.c:2537 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
 __slab_alloc+0x58/0xa0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 __do_kmalloc_node mm/slub.c:4157 [inline]
 __kmalloc_noprof+0x25a/0x400 mm/slub.c:4170
 kmalloc_noprof include/linux/slab.h:685 [inline]
 kzalloc_noprof include/linux/slab.h:807 [inline]
 fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155
 ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3761
 addrconf_f6i_alloc+0x3c2/0x7f0 net/ipv6/route.c:4588
 fixup_permanent_addr net/ipv6/addrconf.c:3586 [inline]
 addrconf_permanent_addr+0x2c8/0xc50 net/ipv6/addrconf.c:3625
 addrconf_notify+0x9f5/0x1020 net/ipv6/addrconf.c:3697
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 __dev_notify_flags+0x207/0x400
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8915
page last free pid 4405 tgid 4405 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612
 __folio_put+0x2c8/0x440 mm/swap.c:128
 folio_put include/linux/mm.h:1486 [inline]
 free_large_kmalloc+0x105/0x1c0 mm/slub.c:4565
 kfree+0x1c4/0x360 mm/slub.c:4588
 device_release+0x99/0x1c0
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 netdev_run_todo+0xe79/0x1000 net/core/dev.c:10769
 ieee80211_unregister_hw+0x128/0x2c0 net/mac80211/main.c:1679
 mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5625
 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6505
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff88806237fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806237fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806237fd00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                       ^
 ffff88806237fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88806237fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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