kvm [31447]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc1 data 0x0 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 31439 Comm: syz-executor0 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 drivers/media/common/videobuf2/videobuf2-vmalloc.c:136 Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 c2 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5e 08 48 8d 7b 09 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 72 01 00 00 RSP: 0018:ffff8801ce177958 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113f20c RDX: 0000000000000001 RSI: ffffffff854dade9 RDI: 0000000000000009 RBP: ffff8801ce177988 R08: ffff8801c1dbc080 R09: ffffed00396d8cba R10: ffff8801ce177a80 R11: ffff8801cb6c65d7 R12: ffffc90009035000 R13: 0000000000000000 R14: ffff8801d9595700 R15: ffff8801d9595700 FS: 00000000013ae940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000007217c8 CR3: 000000017a209000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __vb2_buf_userptr_put drivers/media/common/videobuf2/videobuf2-core.c:258 [inline] __vb2_free_mem drivers/media/common/videobuf2/videobuf2-core.c:417 [inline] __vb2_queue_free+0x4b1/0xa30 drivers/media/common/videobuf2/videobuf2-core.c:458 vb2_core_queue_release+0x62/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2231 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:837 [inline] _vb2_fop_release+0x1d2/0x2b0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1010 vb2_fop_release+0x77/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1024 vivid_fop_release+0x18e/0x440 drivers/media/platform/vivid/vivid-core.c:474 v4l2_release+0x224/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:456 __fput+0x3bc/0xa70 fs/file_table.c:279 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 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 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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:00007ffd2c8b87c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411021 RDX: 0000000000000001 RSI: 00000000007311e0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffd2c8b86f0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000001f38 R15: 0000000000000000 Modules linked in: kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (00000000e439aafb): kobject_uevent_env kobject: 'loop2' (00000000e439aafb): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env ---[ end trace cdd9a4e4381f5d69 ]--- kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 drivers/media/common/videobuf2/videobuf2-vmalloc.c:136 kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000fb872917): kobject_uevent_env kvm [31472]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc1 data 0x0 kobject: 'loop3' (00000000fb872917): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 c2 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5e 08 48 8d 7b 09 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 72 01 00 00 kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kvm [31472]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc1 data 0x0 kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env RSP: 0018:ffff8801ce177958 EFLAGS: 00010202 kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113f20c kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'loop5' (00000000cee679d1): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' RDX: 0000000000000001 RSI: ffffffff854dade9 RDI: 0000000000000009 RBP: ffff8801ce177988 R08: ffff8801c1dbc080 R09: ffffed00396d8cba kobject: 'loop5' (00000000cee679d1): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env R10: ffff8801ce177a80 R11: ffff8801cb6c65d7 R12: ffffc90009035000 R13: 0000000000000000 R14: ffff8801d9595700 R15: ffff8801d9595700 kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' FS: 00000000013ae940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' CR2: 00000000004d4f90 CR3: 000000017a209000 CR4: 00000000001426f0 kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'kvm' (00000000f3b7fc6c): kobject_uevent_env kobject: 'loop2' (00000000e439aafb): kobject_uevent_env kobject: 'loop2' (00000000e439aafb): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'kvm' (00000000f3b7fc6c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000fb872917): kobject_uevent_env kobject: 'loop3' (00000000fb872917): fill_kobj_path: path = '/devices/virtual/block/loop3' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400