Hello, syzbot found the following issue on: HEAD commit: d635a69d Merge tag 'net-next-5.11' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1315f123500000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3556e4856b17a95 dashboard link: https://syzkaller.appspot.com/bug?extid=5138c4dd15a0401bec7b compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12955123500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10f2f30f500000 The issue was bisected to: commit 497a5757ce4e8f37219a3989ac6a561eb9a8e6c7 Author: Heiner Kallweit <hkallweit1@xxxxxxxxx> Date: Sat Nov 7 20:50:56 2020 +0000 tun: switch to net core provided statistics counters bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=143b845b500000 final oops: https://syzkaller.appspot.com/x/report.txt?x=163b845b500000 console output: https://syzkaller.appspot.com/x/log.txt?x=123b845b500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5138c4dd15a0401bec7b@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 497a5757ce4e ("tun: switch to net core provided statistics counters") general protection fault, probably for non-canonical address 0xe000080fe8c072f1: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000607f46039788-0x0000607f4603978f] CPU: 1 PID: 8472 Comm: syz-executor635 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:j1939_ndev_to_priv net/can/j1939/main.c:219 [inline] RIP: 0010:j1939_priv_get_by_ndev_locked net/can/j1939/main.c:231 [inline] RIP: 0010:j1939_priv_get_by_ndev net/can/j1939/main.c:243 [inline] RIP: 0010:j1939_netdev_notify+0x115/0x320 net/can/j1939/main.c:353 Code: 00 74 08 48 89 df e8 ba 1e 48 f9 48 8b 1b 48 85 db 0f 84 f0 00 00 00 4c 89 64 24 08 48 81 c3 28 60 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 8c 1e 48 f9 4c 8b 23 4d 85 e4 0f RSP: 0018:ffffc90000e9fd68 EFLAGS: 00010202 RAX: 00000c0fe8c072f1 RBX: 0000607f46039788 RCX: ffff88801456d040 RDX: ffff88801456d040 RSI: 0000000000000118 RDI: 0000000000000118 RBP: 0000000000000118 R08: ffffffff8870585d R09: fffff520001d3fa5 R10: fffff520001d3fa5 R11: 0000000000000000 R12: 0000000000000010 R13: 1ffff1100293e848 R14: dffffc0000000000 R15: ffff8880149f4244 FS: 0000000001d13880(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000001402f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2022 [inline] call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers+0xeb/0x150 net/core/dev.c:2048 __tun_chr_ioctl+0x2337/0x4860 drivers/net/tun.c:3093 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x440359 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fffd37b9c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440359 RDX: 0000000000000118 RSI: 00000000400454cd RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b60 R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 7688a2c3c10da2e1 ]--- RIP: 0010:j1939_ndev_to_priv net/can/j1939/main.c:219 [inline] RIP: 0010:j1939_priv_get_by_ndev_locked net/can/j1939/main.c:231 [inline] RIP: 0010:j1939_priv_get_by_ndev net/can/j1939/main.c:243 [inline] RIP: 0010:j1939_netdev_notify+0x115/0x320 net/can/j1939/main.c:353 Code: 00 74 08 48 89 df e8 ba 1e 48 f9 48 8b 1b 48 85 db 0f 84 f0 00 00 00 4c 89 64 24 08 48 81 c3 28 60 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 8c 1e 48 f9 4c 8b 23 4d 85 e4 0f RSP: 0018:ffffc90000e9fd68 EFLAGS: 00010202 RAX: 00000c0fe8c072f1 RBX: 0000607f46039788 RCX: ffff88801456d040 RDX: ffff88801456d040 RSI: 0000000000000118 RDI: 0000000000000118 RBP: 0000000000000118 R08: ffffffff8870585d R09: fffff520001d3fa5 R10: fffff520001d3fa5 R11: 0000000000000000 R12: 0000000000000010 R13: 1ffff1100293e848 R14: dffffc0000000000 R15: ffff8880149f4244 FS: 0000000001d13880(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000001402f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
