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BUG: KASAN: slab-out-of-bounds in cfg80211_wext_freq+0x1f9/0x240 net/wireless/wext-compat.c:238
Read of size 2 at addr ffff8880548db140 by task syz-executor.2/11605

CPU: 1 PID: 11605 Comm: syz-executor.2 Not tainted 6.10.0-rc1-syzkaller-00310-g98aa546af5e4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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
 cfg80211_wext_freq+0x1f9/0x240 net/wireless/wext-compat.c:238
 cfg80211_wext_siwscan+0x4fd/0x10d0 net/wireless/scan.c:3447
 ioctl_standard_iw_point+0x788/0xcb0 net/wireless/wext-core.c:867
 ioctl_standard_call+0xc7/0x290 net/wireless/wext-core.c:1052
 wext_ioctl_dispatch+0x58e/0x640 net/wireless/wext-core.c:1016
 wext_handle_ioctl+0x15f/0x270 net/wireless/wext-core.c:1077
 sock_ioctl+0x17f/0x8e0 net/socket.c:1275
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 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: 0033:0x7f9c1ac7cf69
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:00007f9c1ba650c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9c1adb4050 RCX: 00007f9c1ac7cf69
RDX: 0000000020000000 RSI: 0000000000008b18 RDI: 0000000000000005
RBP: 00007f9c1acda6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9c1adb4050 R15: 00007fffc33854e8
 </TASK>

Allocated by task 11605:
 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:4121 [inline]
 __kmalloc_noprof+0x1f9/0x400 mm/slub.c:4134
 kmalloc_noprof include/linux/slab.h:664 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 ioctl_standard_iw_point+0x4ae/0xcb0 net/wireless/wext-core.c:828
 ioctl_standard_call+0xc7/0x290 net/wireless/wext-core.c:1052
 wext_ioctl_dispatch+0x58e/0x640 net/wireless/wext-core.c:1016
 wext_handle_ioctl+0x15f/0x270 net/wireless/wext-core.c:1077
 sock_ioctl+0x17f/0x8e0 net/socket.c:1275
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 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 ffff8880548db000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 4 bytes to the right of
 allocated 316-byte region [ffff8880548db000, ffff8880548db13c)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x548d8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015041c80 ffffea0001a22000 dead000000000002
raw: 0000000000000000 0000000080100010 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015041c80 ffffea0001a22000 dead000000000002
head: 0000000000000000 0000000080100010 00000001ffffefff 0000000000000000
head: 00fff00000000002 ffffea0001523601 ffffffffffffffff 0000000000000000
head: 0000000000000004 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9094, tgid 9094 (syz-executor.0), ts 183274799681, free_ts 176593419812
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660
 __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:2264
 allocate_slab+0x5a/0x2e0 mm/slub.c:2427
 new_slab mm/slub.c:2480 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666
 __slab_alloc+0x58/0xa0 mm/slub.c:3756
 __slab_alloc_node mm/slub.c:3809 [inline]
 slab_alloc_node mm/slub.c:3988 [inline]
 kmalloc_trace_noprof+0x1d5/0x2c0 mm/slub.c:4147
 kmalloc_noprof include/linux/slab.h:660 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 mca_alloc net/ipv6/mcast.c:880 [inline]
 __ipv6_dev_mc_inc+0x426/0xa90 net/ipv6/mcast.c:936
 ipv6_add_dev+0xe03/0x1220 net/ipv6/addrconf.c:468
 addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3652
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 register_netdevice+0x1570/0x19e0 net/core/dev.c:10407
 veth_newlink+0x84f/0xcd0 drivers/net/veth.c:1860
 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3730 [inline]
 rtnl_newlink+0x158f/0x20a0 net/core/rtnetlink.c:3743
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
page last free pid 8925 tgid 8924 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565
 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:143 [inline]
 bpf_ringbuf_alloc+0x3a2/0x420 kernel/bpf/ringbuf.c:170
 ringbuf_map_alloc+0x1d7/0x2f0 kernel/bpf/ringbuf.c:204
 map_create+0x90c/0x1200 kernel/bpf/syscall.c:1333
 __sys_bpf+0x6d1/0x810 kernel/bpf/syscall.c:5669
 __do_sys_bpf kernel/bpf/syscall.c:5794 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5792 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5792
 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

Memory state around the buggy address:
 ffff8880548db000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880548db080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880548db100: 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc
                                           ^
 ffff8880548db180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880548db200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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