BUG: unable to handle kernel paging request at fffffffffffffff4 PGD 926d067 P4D 926d067 PUD 926f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9423 Comm: syz-executor5 Not tainted 4.19.0-rc7-next-20181012+ #93 kobject: 'loop0' (00000000c84fb06b): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 kobject: 'loop0' (00000000c84fb06b): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 0018:ffff88018c1efc28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc9000bed6000 RDX: 1ffffffffffffffe RSI: ffffffff81e08e2c RDI: 0000000000000286 RBP: ffff88018c1efdb0 R08: ffff8801d91080c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c0fe4c30 kobject: 'loop3' (00000000cddfbd1d): kobject_uevent_env R13: ffff8801c9fdeb00 R14: ffff8801c9fdeb00 R15: ffff880186396040 FS: 00007fc50600c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001bff10000 CR4: 00000000001426f0 kobject: 'kvm' (000000009033df21): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: 'kvm' (000000009033df21): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000cddfbd1d): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (000000009033df21): kobject_uevent_env kobject: 'kvm' (000000009033df21): fill_kobj_path: path = '/devices/virtual/misc/kvm' 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 kobject: 'loop3' (00000000cddfbd1d): kobject_uevent_env 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:00007fc50600ba88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 audit: type=1804 audit(1539548072.487:498): pid=9468 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor0" name="/root/syzkaller-testdir208447495/syzkaller.qwLP2e/73/file0/bus" dev="ramfs" ino=31402 res=1 RAX: ffffffffffffffda RBX: 00007fc50600bb30 RCX: 0000000000459fda RDX: 00007fc50600bad0 RSI: 0000000020000080 RDI: 00007fc50600baf0 RBP: 0000000020000080 R08: 00007fc50600bb30 R09: 00007fc50600bad0 R10: 0000000000100020 R11: 0000000000000206 R12: 0000000000000004 R13: 0000000000100020 R14: 00000000004d7d88 R15: 0000000000000003 kobject: 'loop3' (00000000cddfbd1d): fill_kobj_path: path = '/devices/virtual/block/loop3' Modules linked in: audit: type=1804 audit(1539548072.487:499): pid=9468 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor0" name="/root/syzkaller-testdir208447495/syzkaller.qwLP2e/73/file0/bus" dev="ramfs" ino=31421 res=1 CR2: fffffffffffffff4 ---[ end trace 64125481892ea9ec ]--- 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 kobject: 'kvm' (000000009033df21): kobject_uevent_env 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:ffff88018c1efc28 EFLAGS: 00010246 kobject: 'kvm' (000000009033df21): fill_kobj_path: path = '/devices/virtual/misc/kvm' RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc9000bed6000 RDX: 1ffffffffffffffe RSI: ffffffff81e08e2c RDI: 0000000000000286 RBP: ffff88018c1efdb0 R08: ffff8801d91080c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c0fe4c30 kobject: 'kvm' (000000009033df21): kobject_uevent_env R13: ffff8801c9fdeb00 R14: ffff8801c9fdeb00 R15: ffff880186396040 FS: 00007fc50600c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001bff10000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400