device lo entered promiscuous mode device lo left promiscuous mode kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 18134 Comm: syz-executor1 Not tainted 4.18.0-rc5-next-20180720+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_remount_sb+0x371/0x850 fs/super.c:984 Code: ff ff ff e8 11 f9 f9 05 41 89 c5 48 8b 85 30 ff ff ff 48 8d b8 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 03 00 00 48 8b 85 30 ff ff RSP: 0018:ffff8801af39fa38 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8801aaea8180 RCX: ffffc90002a1a000 RDX: 000000000000001c RSI: ffffffff81ee8f2f RDI: 00000000000000e0 RBP: ffff8801af39fb40 R08: ffff8801d6e02500 R09: fffffbfff11c24e5 R10: fffffbfff11c24e5 R11: ffffffff88e1272b R12: ffff8801af39fb18 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f0852c9e700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004dbe20 CR3: 00000001cc12a000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_umount fs/namespace.c:1464 [inline] ksys_umount+0xfa7/0x12f0 fs/namespace.c:1582 __do_sys_umount fs/namespace.c:1593 [inline] __se_sys_umount fs/namespace.c:1591 [inline] __x64_sys_umount+0x54/0x80 fs/namespace.c:1591 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455ab9 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0852c9dc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00007f0852c9e6d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00000000200005c0 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c26ed R14: 00000000004d4320 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace f509d12be43b3b65 ]--- RIP: 0010:do_remount_sb+0x371/0x850 fs/super.c:984 Code: ff ff ff e8 11 f9 f9 05 41 89 c5 48 8b 85 30 ff ff ff 48 8d b8 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 03 00 00 48 8b 85 30 ff ff RSP: 0018:ffff8801af39fa38 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8801aaea8180 RCX: ffffc90002a1a000 RDX: 000000000000001c RSI: ffffffff81ee8f2f RDI: 00000000000000e0 RBP: ffff8801af39fb40 R08: ffff8801d6e02500 R09: fffffbfff11c24e5 R10: fffffbfff11c24e5 R11: ffffffff88e1272b R12: ffff8801af39fb18 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f0852c9e700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004dbe20 CR3: 00000001cc12a000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400