================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5912 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x11db/0x3df0 net/bluetooth/hci_event.c:6185 Read of size 1 at addr ffff888147baf604 by task kworker/u5:2/3509 CPU: 0 PID: 3509 Comm: kworker/u5:2 Not tainted 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: hci0 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5912 [inline] hci_le_meta_evt+0x11db/0x3df0 net/bluetooth/hci_event.c:6185 hci_event_packet+0xc41/0x1550 net/bluetooth/hci_event.c:6502 hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5156 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 3505: 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+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node_track_caller+0x195/0x390 mm/slub.c:4963 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x12c/0x590 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1167 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:391 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xbc/0x430 drivers/bluetooth/hci_vhci.c:290 call_write_iter include/linux/fs.h:2148 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888147baf400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 4 bytes to the right of 512-byte region [ffff888147baf400, ffff888147baf600) The buggy address belongs to the page: page:ffffea00051eeb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147bac head:ffffea00051eeb00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000010200 0000000000000000 0000000600000001 ffff888011c41c80 raw: 0000000000000000 0000000080100010 00000001ffffffff 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 12197824402, free_ts 12120509394 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2031 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc_trace+0x1a0/0x290 mm/slub.c:3245 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] device_private_init drivers/base/core.c:3238 [inline] device_add+0xb5/0xfd0 drivers/base/core.c:3288 device_create_groups_vargs drivers/base/core.c:4053 [inline] device_create_with_groups+0x254/0x2e0 drivers/base/core.c:4139 misc_register+0x250/0x480 drivers/char/misc.c:206 ucma_init+0x13/0xfe drivers/infiniband/core/ucma.c:1856 do_one_initcall+0x22b/0x7a0 init/main.c:1300 do_initcall_level+0x157/0x207 init/main.c:1373 do_initcalls+0x49/0x86 init/main.c:1389 kernel_init_freeable+0x425/0x5b5 init/main.c:1613 kernel_init+0x19/0x290 init/main.c:1504 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 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+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 stack_depot_save+0x3ef/0x440 lib/stackdepot.c:335 kasan_save_stack mm/kasan/common.c:40 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xd1/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_trace+0x143/0x290 mm/slub.c:3247 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] kobject_uevent_env+0x283/0x8d0 lib/kobject_uevent.c:524 kset_register+0x171/0x1d0 lib/kobject.c:894 __class_register+0x23a/0x3c0 drivers/base/class.c:188 mISDNInit+0x4d/0x120 drivers/isdn/mISDN/core.c:379 do_one_initcall+0x22b/0x7a0 init/main.c:1300 do_initcall_level+0x157/0x207 init/main.c:1373 do_initcalls+0x49/0x86 init/main.c:1389 kernel_init_freeable+0x425/0x5b5 init/main.c:1613 kernel_init+0x19/0x290 init/main.c:1504 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Memory state around the buggy address: ffff888147baf500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888147baf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888147baf600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888147baf680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888147baf700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================