R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc86549e1f R14: 00007f1aaa746300 R15: 0000000000022000 ---[ end trace 1a3398193aeb7b42 ]--- ------------[ cut here ]------------ kernel BUG at include/linux/netdevice.h:518! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 12419 Comm: syz-executor.4 Tainted: G W 5.10.117-syzkaller-00814-gfdd06dc6b0f8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:napi_enable include/linux/netdevice.h:518 [inline] RIP: 0010:tun_napi_init drivers/net/tun.c:278 [inline] RIP: 0010:tun_attach+0x14b3/0x14c0 drivers/net/tun.c:818 Code: 89 df e8 e0 ba b7 fe e9 cf fa ff ff e8 f6 e4 7d fe 48 c7 c7 a0 12 68 86 48 89 de e8 67 7c 7b ff e9 e0 fb ff ff e8 dd e4 7d fe <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 RSP: 0000:ffffc900064a7b50 EFLAGS: 00010293 RAX: ffffffff82eecd73 RBX: 0000000000000000 RCX: ffff88810efecf00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900064a7c70 R08: ffffffff82eec175 R09: ffffed1022c90886 R10: ffffed1022c90886 R11: 1ffff11022c90885 R12: ffff888116484428 R13: ffff888115fb8980 R14: ffff888115fb8000 R15: dffffc0000000000 FS: 00007f1aaa746700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000119b9c000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tun_set_iff+0xadf/0x1100 drivers/net/tun.c:2803 __tun_chr_ioctl+0x8ab/0x2130 drivers/net/tun.c:3084 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3360 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f1aab612109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1aaa746168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1aab725100 RCX: 00007f1aab612109 RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003 RBP: 00007f1aab66c05d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc86549e1f R14: 00007f1aaa746300 R15: 0000000000022000 Modules linked in: ---[ end trace 1a3398193aeb7b43 ]--- RIP: 0010:napi_enable include/linux/netdevice.h:518 [inline] RIP: 0010:tun_napi_init drivers/net/tun.c:278 [inline] RIP: 0010:tun_attach+0x14b3/0x14c0 drivers/net/tun.c:818 Code: 89 df e8 e0 ba b7 fe e9 cf fa ff ff e8 f6 e4 7d fe 48 c7 c7 a0 12 68 86 48 89 de e8 67 7c 7b ff e9 e0 fb ff ff e8 dd e4 7d fe <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 RSP: 0000:ffffc900064a7b50 EFLAGS: 00010293 RAX: ffffffff82eecd73 RBX: 0000000000000000 RCX: ffff88810efecf00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900064a7c70 R08: ffffffff82eec175 R09: ffffed1022c90886 R10: ffffed1022c90886 R11: 1ffff11022c90885 R12: ffff888116484428 R13: ffff888115fb8980 R14: ffff888115fb8000 R15: dffffc0000000000 FS: 00007f1aaa746700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000119b9c000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400