================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:116 [inline] BUG: KASAN: use-after-free in __refcount_add include/linux/refcount.h:193 [inline] BUG: KASAN: use-after-free in __refcount_inc include/linux/refcount.h:250 [inline] BUG: KASAN: use-after-free in refcount_inc include/linux/refcount.h:267 [inline] BUG: KASAN: use-after-free in sock_hold include/net/sock.h:712 [inline] BUG: KASAN: use-after-free in sco_sock_timeout+0x63/0x240 net/bluetooth/sco.c:89 Write of size 4 at addr ffff888077b99080 by task kworker/0:20/22097 CPU: 0 PID: 22097 Comm: kworker/0:20 Not tainted 5.17.0-rc6-syzkaller-00242-g0014404f9c18 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events sco_sock_timeout Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 print_address_description+0x65/0x3a0 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report+0x19a/0x1f0 mm/kasan/report.c:459 kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:116 [inline] __refcount_add include/linux/refcount.h:193 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] sock_hold include/net/sock.h:712 [inline] sco_sock_timeout+0x63/0x240 net/bluetooth/sco.c:89 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Allocated by task 29134: 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:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:270 [inline] __kmalloc+0x253/0x380 mm/slub.c:4424 kmalloc include/linux/slab.h:586 [inline] sk_prot_alloc+0xf4/0x230 net/core/sock.c:1923 sk_alloc+0x36/0x340 net/core/sock.c:1976 sco_sock_alloc net/bluetooth/sco.c:483 [inline] sco_sock_create+0xb0/0x450 net/bluetooth/sco.c:522 bt_sock_create+0x15b/0x220 net/bluetooth/af_bluetooth.c:130 __sock_create+0x580/0x8d0 net/socket.c:1468 sock_create net/socket.c:1519 [inline] __sys_socket+0x133/0x380 net/socket.c:1561 __do_sys_socket net/socket.c:1570 [inline] __se_sys_socket net/socket.c:1568 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x119/0x880 kernel/rcu/tree.c:3591 drop_sysctl_table+0x2cd/0x400 fs/proc/proc_sysctl.c:1705 unregister_sysctl_table+0x86/0x130 fs/proc/proc_sysctl.c:1743 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7079 [inline] addrconf_exit_net+0x160/0x200 net/ipv6/addrconf.c:7189 ops_exit_list net/core/net_namespace.c:168 [inline] cleanup_net+0x758/0xc70 net/core/net_namespace.c:597 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3026 [inline] call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3106 netlink_release+0x132f/0x17a0 net/netlink/af_netlink.c:813 __sock_release net/socket.c:650 [inline] sock_release+0x7a/0x140 net/socket.c:678 ops_exit_list net/core/net_namespace.c:168 [inline] cleanup_net+0x758/0xc70 net/core/net_namespace.c:597 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 The buggy address belongs to the object at ffff888077b99000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of 2048-byte region [ffff888077b99000, ffff888077b99800) The buggy address belongs to the page: page:ffffea0001dee600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888077b9f000 pfn:0x77b98 head:ffffea0001dee600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001f19608 ffffea0001478608 ffff888011442000 raw: ffff888077b9f000 0000000000080005 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 0x1d28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 20428, ts 743093054278, free_ts 742029231744 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4165 __alloc_pages+0x255/0x580 mm/page_alloc.c:5389 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0xce/0x3f0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x3fe/0xc30 mm/slub.c:3018 __slab_alloc mm/slub.c:3105 [inline] slab_alloc_node mm/slub.c:3196 [inline] __kmalloc_node_track_caller+0x2df/0x400 mm/slub.c:4957 kmalloc_reserve net/core/skbuff.c:354 [inline] pskb_expand_head+0x111/0x10e0 net/core/skbuff.c:1699 netlink_trim+0x17f/0x210 net/netlink/af_netlink.c:1299 netlink_broadcast+0x64/0x1170 net/netlink/af_netlink.c:1495 nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0xf5/0x1b0 net/netlink/af_netlink.c:2537 rtnl_notify net/core/rtnetlink.c:730 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:3857 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3872 [inline] rtnetlink_event+0x154/0x1b0 net/core/rtnetlink.c:5647 notifier_call_chain kernel/notifier.c:84 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:392 call_netdevice_notifiers_info net/core/dev.c:1919 [inline] __netdev_upper_dev_link+0xc70/0x1500 net/core/dev.c:7487 netdev_upper_dev_link+0x9a/0xe0 net/core/dev.c:7528 macvlan_common_newlink+0xe57/0x15b0 drivers/net/macvlan.c:1501 __rtnl_newlink net/core/rtnetlink.c:3483 [inline] rtnl_newlink+0x14db/0x1d80 net/core/rtnetlink.c:3531 rtnetlink_rcv_msg+0x96f/0xec0 net/core/rtnetlink.c:5596 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0xd1c/0xe00 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x7d/0x580 mm/page_alloc.c:3404 free_slab mm/slub.c:2043 [inline] discard_slab mm/slub.c:2049 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2536 put_cpu_partial+0x116/0x180 mm/slub.c:2612 do_slab_free mm/slub.c:3497 [inline] ___cache_free+0x107/0x160 mm/slub.c:3516 qlist_free_all mm/kasan/quarantine.c:176 [inline] kasan_quarantine_reduce+0x169/0x1f0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:260 [inline] slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3230 [inline] slab_alloc mm/slub.c:3238 [inline] __kmalloc+0x1ed/0x380 mm/slub.c:4420 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:714 [inline] tomoyo_encode2+0x25a/0x560 security/tomoyo/realpath.c:45 tomoyo_encode security/tomoyo/realpath.c:80 [inline] tomoyo_realpath_from_path+0x5c3/0x610 security/tomoyo/realpath.c:288 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x238/0x660 security/tomoyo/file.c:822 security_inode_getattr+0xc0/0x140 security/security.c:1337 vfs_getattr+0x26/0x360 fs/stat.c:157 vfs_statx+0x18b/0x3b0 fs/stat.c:225 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:412 [inline] __se_sys_newfstatat+0xc8/0x760 fs/stat.c:406 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff888077b98f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077b99000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888077b99080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888077b99100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888077b99180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================