RAX: ffffffffffffffda RBX: 00007f32291f3b30 RCX: 0000000000459fda RDX: 00007f32291f3ad0 RSI: 00000000200000c0 RDI: 00007f32291f3af0 RBP: 00000000200000c0 R08: 00007f32291f3b30 R09: 00007f32291f3ad0 R10: 0000000000100823 R11: 0000000000000206 R12: 0000000000000005 R13: 0000000000100823 R14: 00000000004d7d88 R15: 0000000000000004 BUG: unable to handle kernel paging request at fffffffffffffff4 PGD 926d067 P4D 926d067 PUD 926f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 25800 Comm: syz-executor2 Not tainted 4.19.0-rc8-next-20181017+ #96 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop3' (00000000ebc62817): kobject_uevent_env RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2369 [inline] RIP: 0010:do_remount fs/namespace.c:2402 [inline] RIP: 0010:do_mount+0xb98/0x1d90 fs/namespace.c:2965 Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 11 RSP: 0018:ffff8801873ffc28 EFLAGS: 00010246 kobject: 'loop3' (00000000ebc62817): fill_kobj_path: path = '/devices/virtual/block/loop3' RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc90007696000 RDX: 1ffffffffffffffe RSI: ffffffff81df047c RDI: 0000000000000282 RBP: ffff8801873ffdb0 R08: ffff88018b434000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d10bb430 R13: ffff8801d722c480 R14: ffff8801d722c480 R15: ffff88018552c580 FS: 00007f32291f4700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001cc5fd000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ksys_mount+0x12d/0x140 fs/namespace.c:3190 __do_sys_mount fs/namespace.c:3204 [inline] __se_sys_mount fs/namespace.c:3201 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459fda Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f32291f3a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f32291f3b30 RCX: 0000000000459fda RDX: 00007f32291f3ad0 RSI: 00000000200000c0 RDI: 00007f32291f3af0 RBP: 00000000200000c0 R08: 00007f32291f3b30 R09: 00007f32291f3ad0 R10: 0000000000100823 R11: 0000000000000206 R12: 0000000000000005 R13: 0000000000100823 R14: 00000000004d7d88 R15: 0000000000000004 Modules linked in: CR2: fffffffffffffff4 ---[ end trace 1c1f75a47286d8e5 ]--- RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2369 [inline] RIP: 0010:do_remount fs/namespace.c:2402 [inline] RIP: 0010:do_mount+0xb98/0x1d90 fs/namespace.c:2965 Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 11 RSP: 0018:ffff8801873ffc28 EFLAGS: 00010246 kobject: 'loop2' (000000006aeb5388): kobject_uevent_env RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc90007696000 RDX: 1ffffffffffffffe RSI: ffffffff81df047c RDI: 0000000000000282 RBP: ffff8801873ffdb0 R08: ffff88018b434000 R09: 0000000000000000 kobject: 'loop2' (000000006aeb5388): fill_kobj_path: path = '/devices/virtual/block/loop2' R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d10bb430 R13: ffff8801d722c480 R14: ffff8801d722c480 R15: ffff88018552c580 FS: 00007f32291f4700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001cc5fd000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400