================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:182 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:239 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:256 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:760 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x68/0x2b0 net/bluetooth/sco.c:88 Write of size 4 at addr ffff88801a2e2080 by task kworker/1:1/27 CPU: 1 PID: 27 Comm: kworker/1:1 Not tainted 6.8.0-rc6-syzkaller-00278-g58c806d867bf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: events sco_sock_timeout Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:182 [inline] __refcount_inc include/linux/refcount.h:239 [inline] refcount_inc include/linux/refcount.h:256 [inline] sock_hold include/net/sock.h:760 [inline] sco_sock_timeout+0x68/0x2b0 net/bluetooth/sco.c:88 process_one_work+0x889/0x15e0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Allocated by task 22375: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3981 [inline] __kmalloc+0x1f9/0x440 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2078 sk_alloc+0x36/0xb90 net/core/sock.c:2131 __netlink_create+0x63/0x380 net/netlink/af_netlink.c:647 netlink_create+0x3dc/0x670 net/netlink/af_netlink.c:712 __sock_create+0x32e/0x800 net/socket.c:1571 sock_create net/socket.c:1622 [inline] __sys_socket_create net/socket.c:1659 [inline] __sys_socket+0x150/0x260 net/socket.c:1706 __do_sys_socket net/socket.c:1720 [inline] __se_sys_socket net/socket.c:1718 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1718 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 Freed by task 16: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:589 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x124/0x370 mm/slub.c:4409 sk_prot_free net/core/sock.c:2114 [inline] __sk_destruct+0x5e4/0x740 net/core/sock.c:2206 sk_destruct+0xc2/0xf0 net/core/sock.c:2221 __sk_free+0xf4/0x3e0 net/core/sock.c:2232 sk_free+0x7c/0xa0 net/core/sock.c:2243 deferred_put_nlk_sk+0x155/0x2f0 net/netlink/af_netlink.c:748 rcu_do_batch kernel/rcu/tree.c:2190 [inline] rcu_core+0x819/0x1680 kernel/rcu/tree.c:2465 __do_softirq+0x21c/0x8e7 kernel/softirq.c:553 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:551 __call_rcu_common.constprop.0+0x9a/0x7c0 kernel/rcu/tree.c:2715 netlink_release+0x1206/0x1ff0 net/netlink/af_netlink.c:831 __sock_release+0xb0/0x270 net/socket.c:659 sock_close+0x1c/0x30 net/socket.c:1421 __fput+0x270/0xb80 fs/file_table.c:376 __fput_sync+0x47/0x50 fs/file_table.c:461 __do_sys_close fs/open.c:1554 [inline] __se_sys_close fs/open.c:1539 [inline] __x64_sys_close+0x87/0x100 fs/open.c:1539 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 The buggy address belongs to the object at ffff88801a2e2000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff88801a2e2000, ffff88801a2e2800) The buggy address belongs to the physical page: page:ffffea000068b800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801a2e2000 pfn:0x1a2e0 head:ffffea000068b800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000a40(workingset|slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000a40 ffff888014c42000 ffffea00015e5610 ffffea0000a1da10 raw: ffff88801a2e2000 0000000000080003 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 3848659518, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4af/0x19a0 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmalloc_trace+0x30b/0x340 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ds_create_walk_state+0x78/0x250 drivers/acpi/acpica/dswstate.c:518 acpi_ds_execute_arguments+0x70/0x2c0 drivers/acpi/acpica/dsargs.c:66 acpi_ds_get_package_arguments+0xdf/0x150 drivers/acpi/acpica/dsargs.c:312 acpi_ns_init_one_package+0x82/0x110 drivers/acpi/acpica/nsinit.c:279 acpi_ns_init_one_object+0x269/0x4d0 drivers/acpi/acpica/nsinit.c:403 acpi_ns_walk_namespace+0x405/0x5b0 drivers/acpi/acpica/nswalk.c:233 acpi_walk_namespace drivers/acpi/acpica/nsxfeval.c:606 [inline] acpi_walk_namespace+0x110/0x130 drivers/acpi/acpica/nsxfeval.c:554 acpi_ns_initialize_objects+0xa3/0x120 drivers/acpi/acpica/nsinit.c:71 acpi_load_tables+0x62/0x110 drivers/acpi/acpica/tbxfload.c:79 page_owner free stack trace missing Memory state around the buggy address: ffff88801a2e1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801a2e2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801a2e2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801a2e2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801a2e2180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================