IPVS: length: 35 != 26904 ================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_add_virtual_monitor+0xa42/0xce0 net/mac80211/iface.c:1255 Read of size 1 at addr ffff88806c9abd50 by task syz.3.1594/12186 CPU: 1 UID: 0 PID: 12186 Comm: syz.3.1594 Not tainted syzkaller #0 PREEMPT(full) 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 netif_close_many+0x225/0x410 net/core/dev.c:1781 netif_close+0x158/0x210 net/core/dev.c:1798 dev_close+0x10a/0x220 net/core/dev_api.c:220 cfg80211_shutdown_all_interfaces+0xc4/0x200 net/wireless/core.c:280 cfg80211_rfkill_set_block+0x2d/0x50 net/wireless/core.c:310 rfkill_set_block+0x1d2/0x440 net/rfkill/core.c:346 rfkill_fop_write+0x44b/0x570 net/rfkill/core.c:1301 vfs_write+0x27e/0xb30 fs/read_write.c:684 ksys_write+0x145/0x250 fs/read_write.c:738 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: 0033:0x7fb85078f749 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:00007fb851578038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb8509e5fa0 RCX: 00007fb85078f749 RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000007 RBP: 00007fb850813f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb8509e6038 R14: 00007fb8509e5fa0 R15: 00007ffc3e4cb8f8 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7fc5e7429 pfn:0x6c9a8 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: f8(unknown) raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 raw: 00000007fc5e7429 0000000000000000 00000000f8000000 0000000000000000 head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 head: 00000007fc5e7429 0000000000000000 00000000f8000000 0000000000000000 head: 00fff00000000002 ffffea0001b26a01 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 5831, tgid 5831 (syz-executor), ts 95999268970, free_ts 84199672567 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:7134 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11997 ieee80211_if_add+0x45c/0x1370 net/mac80211/iface.c:2227 ieee80211_register_hw+0x35d9/0x4110 net/mac80211/main.c:1607 mac80211_hwsim_new_radio+0x2f76/0x5320 drivers/net/wireless/virtual/mac80211_hwsim.c:5810 hwsim_new_radio_nl+0xf5b/0x1bd0 drivers/net/wireless/virtual/mac80211_hwsim.c:6504 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 page last free pid 5821 tgid 5821 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:3000 folios_put_refs+0x584/0x670 mm/swap.c:1002 free_pages_and_swap_cache+0x277/0x520 mm/swap_state.c:355 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:397 [inline] tlb_flush_mmu+0x3a0/0x680 mm/mmu_gather.c:404 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497 vms_clear_ptes+0x42b/0x530 mm/vma.c:1238 vms_complete_munmap_vmas+0x206/0x8a0 mm/vma.c:1280 do_vmi_align_munmap+0x364/0x440 mm/vma.c:1539 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1587 __vm_munmap+0x207/0x380 mm/vma.c:3203 __do_sys_munmap mm/mmap.c:1077 [inline] __se_sys_munmap mm/mmap.c:1074 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1074 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 Memory state around the buggy address: ffff88806c9abc00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff88806c9abc80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff88806c9abd00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff88806c9abd80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff88806c9abe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ==================================================================