device nr0 entered promiscuous mode device nr0 entered promiscuous mode device nr0 entered promiscuous mode device nr0 entered promiscuous mode device nr0 entered promiscuous mode BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 1d3a54067 P4D 1d3a54067 PUD 1ba78a067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 10511 Comm: syz-executor4 Not tainted 4.19.0-rc7+ #125 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff8801daf07868 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff860a27bf RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8801ab2bd298 RBP: ffff8801daf07df8 R08: ffff8801c7b2e140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff8801daf07dd0 R15: ffff8801ab2bd298 FS: 00007f851cacc700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001bc908000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_softirq+0x30b/0xad8 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1047 do_softirq.part.13+0x126/0x160 kernel/softirq.c:336 do_softirq kernel/softirq.c:328 [inline] __local_bh_enable_ip+0x21d/0x260 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] tun_get_user+0x1c0b/0x4250 drivers/net/tun.c:1963 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1993 call_write_iter include/linux/fs.h:1808 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f851cacbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 000000000000017b RSI: 0000000020000000 RDI: 000000000000000e RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f851cacc6d4 R13: 00000000004c5560 R14: 00000000004d8e98 R15: 00000000ffffffff Modules linked in: CR2: 0000000000000000 ---[ end trace 108e300304238a6e ]--- RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff8801daf07868 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff860a27bf RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8801ab2bd298 RBP: ffff8801daf07df8 R08: ffff8801c7b2e140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff8801daf07dd0 R15: ffff8801ab2bd298 FS: 00007f851cacc700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001bc908000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400