kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 19400 Comm: syz-executor1 Not tainted 4.20.0-rc1-next-20181109+ #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop2' (000000004786bf94): kobject_uevent_env
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
kobject: 'loop2' (000000004786bf94): fill_kobj_path: path = '/devices/virtual/block/loop2'
RSP: 0018:ffff88017eff7958 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113f20c
RDX: 0000000000000001 RSI: ffffffff854dade9 RDI: 0000000000000009
RBP: ffff88017eff7988 R08: ffff88017ffa2640 R09: ffffed0039512e71
R10: ffff88017eff7a80 R11: ffff8801ca89738f R12: ffffc90005a74000
R13: 0000000000000000 R14: ffff8801c49b1700 R15: ffff8801c49b1700
FS:  00000000010f2940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
kobject: 'loop3' (00000000d635a946): kobject_uevent_env
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcc96b6ff8 CR3: 00000001bc1e9000 CR4: 00000000001426f0
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
kobject: 'loop3' (00000000d635a946): fill_kobj_path: path = '/devices/virtual/block/loop3'
 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:00007ffe405e2370 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021
RDX: 0000000000000000 RSI: 00000000007323a8 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffe405e2290 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000000000000019b R15: 0000000000000001
Modules linked in:
---[ end trace 07cc22cad6768295 ]---
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
kobject: 'loop0' (0000000094ffe215): kobject_uevent_env
RSP: 0018:ffff88017eff7958 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113f20c
kobject: 'loop0' (0000000094ffe215): fill_kobj_path: path = '/devices/virtual/block/loop0'
RDX: 0000000000000001 RSI: ffffffff854dade9 RDI: 0000000000000009
RBP: ffff88017eff7988 R08: ffff88017ffa2640 R09: ffffed0039512e71
kobject: 'loop4' (00000000b3a333e1): kobject_uevent_env
R10: ffff88017eff7a80 R11: ffff8801ca89738f R12: ffffc90005a74000
kobject: 'loop4' (00000000b3a333e1): fill_kobj_path: path = '/devices/virtual/block/loop4'
R13: 0000000000000000 R14: ffff8801c49b1700 R15: ffff8801c49b1700
FS:  00000000010f2940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001bc1e9000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'regulatory.0' (00000000a83a3fb9): kobject_uevent_env