Hello, syzbot found the following issue on: HEAD commit: b9ad3e9f bonding: wait for sysfs kobject destruction befor.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1195c5cd500000 kernel config: https://syzkaller.appspot.com/x/.config?x=330f3436df12fd44 dashboard link: https://syzkaller.appspot.com/bug?extid=d0ddd88c9a7432f041e6 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c409cd500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1349ced1500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d0ddd88c9a7432f041e6@xxxxxxxxxxxxxxxxxxxxxxxxx RAX: ffffffffffffffda RBX: 00007fffc0827800 RCX: 0000000000443749 RDX: 0000000000000018 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000001bbbbbb R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ BUG: receive list entry not found for dev vcan0, id 001, mask C00007FF WARNING: CPU: 0 PID: 8495 at net/can/af_can.c:546 can_rx_unregister+0x5a4/0x700 net/can/af_can.c:546 Modules linked in: CPU: 0 PID: 8495 Comm: syz-executor608 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:can_rx_unregister+0x5a4/0x700 net/can/af_can.c:546 Code: 8b 7c 24 78 44 8b 64 24 68 49 c7 c5 a0 ae 56 8a e8 11 58 97 f9 44 89 f9 44 89 e2 4c 89 ee 48 c7 c7 e0 ae 56 8a e8 76 ab d3 00 <0f> 0b 48 8b 7c 24 28 e8 90 22 0f 01 e9 54 fb ff ff e8 06 cf d8 f9 RSP: 0018:ffffc9000182f9f0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801ffe8000 RSI: ffffffff8158f3c5 RDI: fffff52000305f30 RBP: 0000000000000118 R08: 0000000000000001 R09: ffff8880b9e30627 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88801ab00000 R14: 1ffff92000305f45 R15: 00000000c00007ff FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004c8928 CR3: 000000000b08e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: isotp_notifier+0x2a7/0x540 net/can/isotp.c:1303 call_netdevice_notifier net/core/dev.c:1735 [inline] call_netdevice_unregister_notifiers+0x156/0x1c0 net/core/dev.c:1763 call_netdevice_unregister_net_notifiers net/core/dev.c:1791 [inline] unregister_netdevice_notifier+0xcd/0x170 net/core/dev.c:1870 isotp_release+0x136/0x600 net/can/isotp.c:1011 __sock_release+0xcd/0x280 net/socket.c:596 sock_close+0x18/0x20 net/socket.c:1277 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:151 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0xb64/0x29b0 kernel/exit.c:809 do_group_exit+0x125/0x310 kernel/exit.c:906 __do_sys_exit_group kernel/exit.c:917 [inline] __se_sys_exit_group kernel/exit.c:915 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:915 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x442388 Code: Unable to access opcode bytes at RIP 0x44235e. RSP: 002b:00007fffc0827768 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000442388 RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00000000004c88f0 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006dd240 R14: 0000000000000000 R15: 0000000000000000 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
