kasan: GPF could be caused by NULL-ptr deref or user memory access XFS (loop4): unknown mount option [ tdev= ]. general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8244 Comm: syz-executor5 Not tainted 4.20.0-rc1-next-20181107+ #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__x86_indirect_thunk_rbx+0x10/0x20 arch/x86/lib/retpoline.S:33 Code: 90 0f ae e8 eb f9 48 89 04 24 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 90 0f ae e8 eb f9 48 89 1c 24 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 RSP: 0018:ffff88017e386eb0 EFLAGS: 00010293 RAX: ffff8801c5d7e100 RBX: 08538b4811730443 RCX: ffffffff81ed555d RDX: 0000000000000000 RSI: ffffffff81ed5c9e RDI: ffff88017e386f38 RBP: ffff88017e3870a0 R08: ffff8801c5d7e100 R09: ffffed003b5c5b67 R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801bfe81a80 R13: ffff88017e386f38 R14: 1ffff1002fc70ddb R15: dffffc0000000000 FS: 00007f69208d9700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc1ce28a8 CR3: 00000001bdc15000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: locks_remove_file+0x148/0x5c0 fs/locks.c:2607 __fput+0x2f0/0xa70 fs/file_table.c:271 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad1/0x26d0 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 kobject: 'loop1' (000000008c275ed0): kobject_uevent_env prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 kobject: 'loop1' (000000008c275ed0): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000081abcd20): kobject_uevent_env kobject: 'loop3' (0000000081abcd20): fill_kobj_path: path = '/devices/virtual/block/loop3' entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 kobject: 'loop2' (00000000b39f57c8): kobject_uevent_env 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:00007f69208d8c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000000001ca RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 kobject: 'loop2' (00000000b39f57c8): fill_kobj_path: path = '/devices/virtual/block/loop2' R10: 0000000000000000 R11: 0000000000000246 R12: 00007f69208d96d4 R13: 00000000004c517c R14: 00000000004d8908 R15: 00000000ffffffff Modules linked in: kobject: 'kvm' (00000000921c0e2b): kobject_uevent_env kobject: 'loop3' (0000000081abcd20): kobject_uevent_env kobject: 'kvm' (00000000921c0e2b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop4' (0000000045d6c7c9): kobject_uevent_env ---[ end trace c139348352f6f934 ]--- RIP: 0010:__x86_indirect_thunk_rbx+0x10/0x20 arch/x86/lib/retpoline.S:33 Code: 90 0f ae e8 eb f9 48 89 04 24 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 90 0f ae e8 eb f9 48 89 1c 24 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 kobject: 'loop3' (0000000081abcd20): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000b39f57c8): kobject_uevent_env RSP: 0018:ffff88017e386eb0 EFLAGS: 00010293 kobject: 'loop2' (00000000b39f57c8): fill_kobj_path: path = '/devices/virtual/block/loop2' RAX: ffff8801c5d7e100 RBX: 08538b4811730443 RCX: ffffffff81ed555d RDX: 0000000000000000 RSI: ffffffff81ed5c9e RDI: ffff88017e386f38 kobject: 'loop3' (0000000081abcd20): kobject_uevent_env RBP: ffff88017e3870a0 R08: ffff8801c5d7e100 R09: ffffed003b5c5b67 kobject: 'loop3' (0000000081abcd20): fill_kobj_path: path = '/devices/virtual/block/loop3' R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801bfe81a80 kobject: 'loop5' (00000000670a7275): kobject_uevent_env R13: ffff88017e386f38 R14: 1ffff1002fc70ddb R15: dffffc0000000000 kobject: 'loop5' (00000000670a7275): fill_kobj_path: path = '/devices/virtual/block/loop5' FS: 00007f69208d9700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'loop0' (00000000b62b904f): kobject_uevent_env kobject: 'loop4' (0000000045d6c7c9): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000b62b904f): fill_kobj_path: path = '/devices/virtual/block/loop0' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop4' (0000000045d6c7c9): kobject_uevent_env kobject: 'loop4' (0000000045d6c7c9): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'kvm' (00000000921c0e2b): kobject_uevent_env CR2: 000000000082d0e0 CR3: 00000001c493a000 CR4: 00000000001426e0 kobject: 'kvm' (00000000921c0e2b): fill_kobj_path: path = '/devices/virtual/misc/kvm' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'kvm' (00000000921c0e2b): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'kvm' (00000000921c0e2b): fill_kobj_path: path = '/devices/virtual/misc/kvm'