kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7334 Comm: syz-executor4 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:locks_remove_flock+0x216/0x350 fs/locks.c:2567 Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40 kobject: 'vetÿÿÿÃ' (0000000097af7790): kobject_add_internal: parent: 'net', set: 'devices' RSP: 0018:ffff88018b0cf880 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb RBP: ffff88018b0cfa60 R08: ffff88018b07c240 R09: ffffed003b5e5b67 R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801c41bed00 R13: ffff88018b0cf8f8 R14: 1ffff10031619f13 R15: dffffc0000000000 FS: 0000000000efa940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a40021 CR3: 00000001d95f6000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'vetÿÿÿÃ' (0000000097af7790): kobject_uevent_env Call Trace: kobject: 'vetÿÿÿÃ' (0000000097af7790): fill_kobj_path: path = '/devices/virtual/net/vetÿÿÿÃ' kobject: 'queues' (0000000040c0fcbe): kobject_add_internal: parent: 'vetÿÿÿÃ', set: '' locks_remove_file+0x148/0x5c0 fs/locks.c:2607 kobject: 'queues' (0000000040c0fcbe): kobject_uevent_env kobject: 'queues' (0000000040c0fcbe): kobject_uevent_env: filter function caused the event to drop! __fput+0x2f0/0xa70 fs/file_table.c:271 kobject: 'rx-0' (00000000e242f1b3): kobject_add_internal: parent: 'queues', set: 'queues' ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 kobject: 'rx-0' (00000000e242f1b3): kobject_uevent_env tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 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: 'rx-0' (00000000e242f1b3): fill_kobj_path: path = '/devices/virtual/net/vetÿÿÿÃ/queues/rx-0' entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'tx-0' (000000007481663a): kobject_add_internal: parent: 'queues', set: 'queues' RIP: 0033:0x411021 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fffea1724f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000732a20 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffea172410 R11: 0000000000000293 R12: 0000000000000000 kobject: 'tx-0' (000000007481663a): kobject_uevent_env R13: 0000000000000001 R14: 0000000000000004 R15: 0000000000000004 Modules linked in: ---[ end trace 8618092e0867bded ]--- kobject: 'tx-0' (000000007481663a): fill_kobj_path: path = '/devices/virtual/net/vetÿÿÿÃ/queues/tx-0' RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567 kobject: 'loop5' (00000000bd502189): kobject_uevent_env kobject: 'loop5' (00000000bd502189): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'rx-0' (00000000e242f1b3): kobject_cleanup, parent 0000000040c0fcbe kobject: 'loop2' (0000000032932654): kobject_uevent_env kobject: 'rx-0' (00000000e242f1b3): auto cleanup 'remove' event kobject: 'loop2' (0000000032932654): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (00000000e242f1b3): kobject_uevent_env kobject: 'rx-0' (00000000e242f1b3): fill_kobj_path: path = '/devices/virtual/net/vetÿÿÿÃ/queues/rx-0' kobject: 'rx-0' (00000000e242f1b3): auto cleanup kobject_del kobject: 'rx-0' (00000000e242f1b3): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000007481663a): kobject_cleanup, parent 0000000040c0fcbe kobject: 'tx-0' (000000007481663a): auto cleanup 'remove' event kobject: 'tx-0' (000000007481663a): kobject_uevent_env kobject: 'tx-0' (000000007481663a): fill_kobj_path: path = '/devices/virtual/net/vetÿÿÿÃ/queues/tx-0' Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40 kobject: 'tx-0' (000000007481663a): auto cleanup kobject_del kobject: 'loop2' (0000000032932654): kobject_uevent_env kobject: 'loop2' (0000000032932654): fill_kobj_path: path = '/devices/virtual/block/loop2' RSP: 0018:ffff88018b0cf880 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d kobject: 'tx-0' (000000007481663a): calling ktype release kobject: 'loop5' (00000000bd502189): kobject_uevent_env RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb kobject: 'tx-0': free name kobject: 'loop5' (00000000bd502189): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'queues' (0000000040c0fcbe): kobject_cleanup, parent (null) RBP: ffff88018b0cfa60 R08: ffff88018b07c240 R09: ffffed003b5e5b67 R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801c41bed00 kobject: 'queues' (0000000040c0fcbe): calling ktype release kobject: 'kvm' (000000009cfef55e): kobject_uevent_env kobject: 'queues' (0000000040c0fcbe): kset_release R13: ffff88018b0cf8f8 R14: 1ffff10031619f13 R15: dffffc0000000000 kobject: 'queues': free name kobject: 'vetÿÿÿÃ' (0000000097af7790): kobject_uevent_env FS: 0000000000efa940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 kobject: 'kvm' (000000009cfef55e): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'vetÿÿÿÃ' (0000000097af7790): fill_kobj_path: path = '/devices/virtual/net/vetÿÿÿÃ' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c2a000 CR3: 00000001d95f6000 CR4: 00000000001426f0 kobject: 'loop1' (00000000e1db488c): kobject_uevent_env kobject: 'loop1' (00000000e1db488c): fill_kobj_path: path = '/devices/virtual/block/loop1' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'vetÿÿÿÃ' (0000000097af7790): kobject_cleanup, parent (null) kobject: 'vetÿÿÿÃ' (0000000097af7790): calling ktype release kobject: 'loop2' (0000000032932654): kobject_uevent_env kobject: 'vetÿÿÿÃ': free name kobject: 'loop2' (0000000032932654): fill_kobj_path: path = '/devices/virtual/block/loop2' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400