IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready ================================================================== BUG: KASAN: use-after-free in constant_test_bit arch/x86/include/asm/bitops.h:317 [inline] BUG: KASAN: use-after-free in sock_flag include/net/sock.h:839 [inline] BUG: KASAN: use-after-free in l2cap_sock_kill+0xdb/0x100 net/bluetooth/l2cap_sock.c:1046 IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready Read of size 8 at addr ffff88809f8976a0 by task kworker/0:3/7460 8021q: adding VLAN 0 to HW filter on device team0 CPU: 0 PID: 7460 Comm: kworker/0:3 Not tainted 4.19.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events l2cap_chan_timeout Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 print_address_description.cold+0x56/0x25c mm/kasan/report.c:256 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready kasan_report_error.cold+0x66/0xb9 mm/kasan/report.c:354 IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 constant_test_bit arch/x86/include/asm/bitops.h:317 [inline] sock_flag include/net/sock.h:839 [inline] l2cap_sock_kill+0xdb/0x100 net/bluetooth/l2cap_sock.c:1046 l2cap_chan_timeout+0x1bb/0x210 net/bluetooth/l2cap_core.c:431 process_one_work+0x796/0x14e0 kernel/workqueue.c:2155 IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready worker_thread+0x64c/0x1130 kernel/workqueue.c:2298 IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready Allocated by task 20744: IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x4f0 mm/slab.c:3736 hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network kmalloc include/linux/slab.h:520 [inline] sk_prot_alloc+0x1e2/0x2d0 net/core/sock.c:1466 hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network sk_alloc+0x36/0x1100 net/core/sock.c:1520 IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready l2cap_sock_alloc.constprop.0+0x31/0x210 net/bluetooth/l2cap_sock.c:1590 IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready l2cap_sock_create+0x110/0x1b0 net/bluetooth/l2cap_sock.c:1636 bt_sock_create+0x1d0/0x470 net/bluetooth/af_bluetooth.c:130 __sock_create+0x495/0x820 net/socket.c:1276 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready rfcomm_l2sock_create net/bluetooth/rfcomm/core.c:203 [inline] rfcomm_session_create net/bluetooth/rfcomm/core.c:738 [inline] __rfcomm_dlc_open net/bluetooth/rfcomm/core.c:388 [inline] rfcomm_dlc_open+0x6da/0xc50 net/bluetooth/rfcomm/core.c:431 rfcomm_sock_connect+0x317/0x420 net/bluetooth/rfcomm/sock.c:416 8021q: adding VLAN 0 to HW filter on device batadv0 __sys_connect+0x265/0x2c0 net/socket.c:1663 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready __do_sys_connect net/socket.c:1674 [inline] __se_sys_connect net/socket.c:1671 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1671 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 8021q: adding VLAN 0 to HW filter on device batadv0 Freed by task 3611: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x250 mm/slab.c:3822 sk_prot_free net/core/sock.c:1503 [inline] __sk_destruct+0x61d/0x830 net/core/sock.c:1584 sk_destruct net/core/sock.c:1599 [inline] __sk_free+0x165/0x3b0 net/core/sock.c:1610 sk_free+0x3b/0x50 net/core/sock.c:1621 sock_put include/net/sock.h:1711 [inline] l2cap_sock_kill+0xd4/0x100 net/bluetooth/l2cap_sock.c:1055 l2cap_sock_release+0xd9/0x100 net/bluetooth/l2cap_sock.c:1204 __sock_release net/socket.c:579 [inline] sock_release+0x87/0x1d0 net/socket.c:599 IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready rfcomm_session_del+0x15a/0x1f0 net/bluetooth/rfcomm/core.c:684 rfcomm_session_close net/bluetooth/rfcomm/core.c:723 [inline] rfcomm_process_rx net/bluetooth/rfcomm/core.c:1916 [inline] rfcomm_process_sessions net/bluetooth/rfcomm/core.c:2000 [inline] rfcomm_run+0x13c4/0x45d1 net/bluetooth/rfcomm/core.c:2087 IPv6: ADDRCONF(NETDEV_UP): veth1_virt_wifi: link is not ready kthread+0x33f/0x460 kernel/kthread.c:259 IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready The buggy address belongs to the object at ffff88809f897640 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 96 bytes inside of 2048-byte region [ffff88809f897640, ffff88809f897e40) The buggy address belongs to the page: page:ffffea00027e2580 count:1 mapcount:0 mapping:ffff88812c3f6c40 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffffea00012e6588 ffffea0001198488 ffff88812c3f6c40 raw: 0000000000000000 ffff88809f896540 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809f897580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809f897600: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready >ffff88809f897680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88809f897700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809f897780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready