vcan0: j1939_xtp_rx_abort_one: 0x000000000820f4a9: 0x00000: (3) A timeout occurred and this is the connection abort to close the session. vcan0: j1939_xtp_rx_abort_one: 0x00000000b1f6d063: 0x00000: (3) A timeout occurred and this is the connection abort to close the session. ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:380 [inline] BUG: KASAN: slab-out-of-bounds in j1939_session_tx_dat net/can/j1939/transport.c:790 [inline] BUG: KASAN: slab-out-of-bounds in j1939_xtp_txnext_transmiter net/can/j1939/transport.c:847 [inline] BUG: KASAN: slab-out-of-bounds in j1939_tp_txtimer+0x777/0x1b00 net/can/j1939/transport.c:1095 Read of size 7 at addr ffff8880905826af by task ksoftirqd/1/16 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 memcpy+0x24/0x50 mm/kasan/common.c:125 memcpy include/linux/string.h:380 [inline] j1939_session_tx_dat net/can/j1939/transport.c:790 [inline] j1939_xtp_txnext_transmiter net/can/j1939/transport.c:847 [inline] j1939_tp_txtimer+0x777/0x1b00 net/can/j1939/transport.c:1095 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579 hrtimer_run_softirq+0x17e/0x270 kernel/time/hrtimer.c:1596 __do_softirq+0x262/0x98c kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:603 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:595 smpboot_thread_fn+0x6a3/0xa40 kernel/smpboot.c:165 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 9315: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x163/0x770 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:670 [inline] __register_sysctl_table+0xc7/0xef0 fs/proc/proc_sysctl.c:1331 register_net_sysctl+0x29/0x30 net/sysctl_net.c:121 __addrconf_sysctl_register+0x221/0x430 net/ipv6/addrconf.c:6850 addrconf_sysctl_register net/ipv6/addrconf.c:6897 [inline] addrconf_sysctl_register+0x140/0x1e0 net/ipv6/addrconf.c:6886 ipv6_add_dev net/ipv6/addrconf.c:443 [inline] ipv6_add_dev+0x9dd/0x10b0 net/ipv6/addrconf.c:363 addrconf_notify+0x89c/0x2270 net/ipv6/addrconf.c:3491 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1893 [inline] call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:1878 call_netdevice_notifiers_extack net/core/dev.c:1905 [inline] call_netdevice_notifiers net/core/dev.c:1919 [inline] register_netdevice+0x6de/0x1020 net/core/dev.c:9345 bond_newlink drivers/net/bonding/bond_netlink.c:458 [inline] bond_newlink+0x4b/0x90 drivers/net/bonding/bond_netlink.c:448 __rtnl_newlink+0x109e/0x1790 net/core/rtnetlink.c:3305 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3363 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5424 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5442 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 __sys_sendto+0x262/0x380 net/socket.c:1985 __do_sys_sendto net/socket.c:1997 [inline] __se_sys_sendto net/socket.c:1993 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1993 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff888090582000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1711 bytes inside of 2048-byte region [ffff888090582000, ffff888090582800) The buggy address belongs to the page: page:ffffea0002416080 refcount:1 mapcount:0 mapping:ffff8880aa400e00 index:0x0 raw: 00fffe0000000200 ffffea0002a06388 ffffea00025cd188 ffff8880aa400e00 raw: 0000000000000000 ffff888090582000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888090582580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888090582600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888090582680: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff888090582700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888090582780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================