netlink: 'syz.8.2166': attribute type 10 has an invalid length. ================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_add_virtual_monitor+0xa42/0xce0 net/mac80211/iface.c:1255 Read of size 1 at addr ffff88805e077d90 by task syz.8.2166/14955 CPU: 1 UID: 0 PID: 14955 Comm: syz.8.2166 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 ieee80211_add_virtual_monitor+0xa42/0xce0 net/mac80211/iface.c:1255 ieee80211_do_stop+0x1786/0x1f70 net/mac80211/iface.c:746 ieee80211_stop+0x1b1/0x240 net/mac80211/iface.c:828 __dev_close_many+0x344/0x6b0 net/core/dev.c:1756 __dev_close net/core/dev.c:1768 [inline] __dev_change_flags+0x2be/0x680 net/core/dev.c:9733 netif_change_flags+0x88/0x1a0 net/core/dev.c:9798 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3158 rtnl_changelink net/core/rtnetlink.c:3776 [inline] __rtnl_newlink net/core/rtnetlink.c:3935 [inline] rtnl_newlink+0x161c/0x1c90 net/core/rtnetlink.c:4072 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec+0x18f/0x1d0 net/socket.c:737 __sock_sendmsg net/socket.c:752 [inline] ____sys_sendmsg+0x577/0x880 net/socket.c:2610 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2664 __sys_sendmsg net/socket.c:2696 [inline] __do_sys_sendmsg net/socket.c:2701 [inline] __se_sys_sendmsg net/socket.c:2699 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2699 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fefe8d8f749 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:00007fefe9bfa038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fefe8fe5fa0 RCX: 00007fefe8d8f749 RDX: 0000000000000000 RSI: 0000200000000600 RDI: 0000000000000005 RBP: 00007fefe8e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fefe8fe6038 R14: 00007fefe8fe5fa0 R15: 00007ffdc98e6448 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x109 pfn:0x5e074 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88805eb0c782 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f8(unknown) raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000109 0000000000000000 00000000f8000000 ffff88805eb0c782 head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 head: 0000000000000109 0000000000000000 00000000f8000000 ffff88805eb0c782 head: 00fff00000000002 ffffea0001781d01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x446dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP), pid 12691, tgid 12690 (syz.8.1911), ts 520789943290, free_ts 432225798748 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846 prep_new_page mm/page_alloc.c:1854 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 ___kmalloc_large_node+0x4e/0x150 mm/slub.c:5598 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5629 __do_kmalloc_node mm/slub.c:5645 [inline] __kvmalloc_node_noprof+0x6e/0x920 mm/slub.c:7136 alloc_netdev_mqs+0xa8/0x1200 net/core/dev.c:12011 ieee80211_if_add+0x45c/0x1370 net/mac80211/iface.c:2227 ieee80211_add_iface+0xb5/0x5a0 net/mac80211/cfg.c:217 rdev_add_virtual_intf net/wireless/rdev-ops.h:50 [inline] _nl80211_new_interface net/wireless/nl80211.c:4706 [inline] nl80211_new_interface+0x883/0x1130 net/wireless/nl80211.c:4764 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344 page last free pid 5833 tgid 5833 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943 __folio_put+0x21b/0x2c0 mm/swap.c:112 folio_put include/linux/mm.h:1618 [inline] aio_free_ring+0x265/0x480 fs/aio.c:345 free_ioctx+0x23/0xd0 fs/aio.c:622 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Memory state around the buggy address: ffff88805e077c80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff88805e077d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff88805e077d80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff88805e077e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff88805e077e80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ==================================================================