================================================================== BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline] BUG: KASAN: slab-out-of-bounds in hci_sock_setsockopt+0x7f1/0x820 net/bluetooth/hci_sock.c:1925 Read of size 4 at addr ffff88814afa25f3 by task syz.1.1329/4954 CPU: 1 PID: 4954 Comm: syz.1.1329 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report_generic.c:319 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] copy_from_sockptr include/linux/sockptr.h:55 [inline] hci_sock_setsockopt+0x7f1/0x820 net/bluetooth/hci_sock.c:1925 __sys_setsockopt+0x2e9/0x470 net/socket.c:2202 __do_sys_setsockopt net/socket.c:2213 [inline] __se_sys_setsockopt net/socket.c:2210 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2210 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 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 RIP: 0033:0x7f8a7d5c4f79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8a7bfff028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f8a7d83f090 RCX: 00007f8a7d5c4f79 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f8a7d65b7e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8a7d83f128 R14: 00007f8a7d83f090 R15: 00007ffe7f1e7b68 Allocated by task 4954: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 kmalloc include/linux/slab.h:624 [inline] __cgroup_bpf_run_filter_setsockopt+0x8e7/0xaa0 kernel/bpf/cgroup.c:1511 __sys_setsockopt+0x40e/0x470 net/socket.c:2185 __do_sys_setsockopt net/socket.c:2213 [inline] __se_sys_setsockopt net/socket.c:2210 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2210 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 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 ffff88814afa25f0 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 3 bytes inside of 8-byte region [ffff88814afa25f0, ffff88814afa25f8) The buggy address belongs to the page: page:ffffea00052be880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14afa2 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042300 raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4939, ts 256861749100, free_ts 256678923030 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2d3a/0x2dc0 mm/page_alloc.c:4485 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5808 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa1/0x4d0 mm/slub.c:2000 ___slab_alloc+0x381/0x810 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc+0x16a/0x2c0 mm/slub.c:4432 __kmalloc_node include/linux/slab.h:487 [inline] kmalloc_node include/linux/slab.h:642 [inline] __vmalloc_area_node mm/vmalloc.c:2967 [inline] __vmalloc_node_range+0x375/0xaf0 mm/vmalloc.c:3147 __vmalloc_node mm/vmalloc.c:3212 [inline] __vmalloc+0x79/0x90 mm/vmalloc.c:3226 __vmalloc_array mm/util.c:720 [inline] __vcalloc+0x36/0x50 mm/util.c:743 kvm_page_track_create_memslot+0x32/0x90 arch/x86/kvm/mmu/page_track.c:39 kvm_alloc_memslot_metadata arch/x86/kvm/x86.c:11915 [inline] kvm_arch_prepare_memory_region+0x98a/0xb70 arch/x86/kvm/x86.c:11952 kvm_set_memslot+0x552/0x1790 virt/kvm/kvm_main.c:1683 __kvm_set_memory_region+0xb93/0xdf0 virt/kvm/kvm_main.c:1843 kvm_set_memory_region virt/kvm/kvm_main.c:1864 [inline] kvm_vm_ioctl_set_memory_region+0x74/0xa0 virt/kvm/kvm_main.c:1876 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xae/0x540 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5884 __vunmap+0x86d/0xa00 mm/vmalloc.c:2660 __vfree mm/vmalloc.c:2709 [inline] vfree+0x8b/0xc0 mm/vmalloc.c:2740 kvfree+0x26/0x40 mm/util.c:659 kvm_page_track_free_memslot+0x3d/0x60 arch/x86/kvm/mmu/page_track.c:27 kvm_arch_free_memslot+0x142/0x150 arch/x86/kvm/x86.c:11795 kvm_free_memslot virt/kvm/kvm_main.c:934 [inline] kvm_free_memslots virt/kvm/kvm_main.c:948 [inline] kvm_destroy_vm virt/kvm/kvm_main.c:1254 [inline] kvm_put_kvm+0xc78/0x11c0 virt/kvm/kvm_main.c:1283 kvm_vm_release+0x46/0x50 virt/kvm/kvm_main.c:1306 __fput+0x20b/0x8b0 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 Memory state around the buggy address: ffff88814afa2480: fc fa fc fc fc fc 07 fc fc fc fc fc fc fc fc fc ffff88814afa2500: fa fc fc fc fc 00 fc fc fc fc fa fc fc fc fc fa >ffff88814afa2580: fc fc fc fc fa fc fc fc fc fa fc fc fc fc 01 fc ^ ffff88814afa2600: fc fc fc 04 fc fc fc fc fa fc fc fc fc fa fc fc ffff88814afa2680: fc fc 05 fc fc fc fc fa fc fc fc fc fa fc fc fc ==================================================================