================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5961 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x1324/0x3c90 net/bluetooth/hci_event.c:6235 Read of size 1 at addr ffff888077349c0a by task kworker/u5:8/4201 CPU: 0 PID: 4201 Comm: kworker/u5:8 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: hci1 hci_rx_work Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5961 [inline] hci_le_meta_evt+0x1324/0x3c90 net/bluetooth/hci_event.c:6235 hci_event_packet+0xe48/0x1370 net/bluetooth/hci_event.c:6552 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5164 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 4402: kasan_save_stack mm/kasan/common.c:38 [inline] 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+0xb5/0xf0 mm/kasan/common.c:522 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x22c/0x750 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:392 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xbc/0x450 drivers/bluetooth/hci_vhci.c:290 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x745/0xd60 fs/read_write.c:594 ksys_write+0x152/0x260 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888077349800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 10 bytes to the right of 1024-byte region [ffff888077349800, ffff888077349c00) The buggy address belongs to the page: page:ffffea0001dcd200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77348 head:ffffea0001dcd200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888016c41dc0 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 144, ts 68799259267, free_ts 68752104299 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5487 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] __kmalloc+0x1cd/0x330 mm/slub.c:4408 kmalloc include/linux/slab.h:612 [inline] kzalloc include/linux/slab.h:738 [inline] ieee802_11_parse_elems_crc+0xb3/0x10b0 net/mac80211/util.c:1478 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2243 [inline] ieee80211_bss_info_update+0x751/0xa70 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline] ieee80211_ibss_rx_queued_mgmt+0x1700/0x2ab0 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1459 [inline] ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1513 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 free_nonslab_page+0xe2/0x150 mm/slub.c:3540 kmem_free fs/xfs/kmem.h:62 [inline] xlog_dealloc_log+0x172/0x270 fs/xfs/xfs_log.c:2068 xfs_unmountfs+0x1af/0x260 fs/xfs/xfs_mount.c:1040 xfs_fs_put_super+0x66/0x2b0 fs/xfs/xfs_super.c:1095 generic_shutdown_super+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff888077349b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888077349b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888077349c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888077349c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077349d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================