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
Modules linked in:
CPU: 1 PID: 23994 Comm: syz-executor.4 Not tainted 4.14.273-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a24c0500 task.stack: ffff888096620000
RIP: 0010:vb2_vmalloc_put_userptr+0x6a/0x210 drivers/media/v4l2-core/videobuf2-vmalloc.c:136
RSP: 0018:ffff888096627cc8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff103fc50
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000009
RBP: ffff88809fa24f00 R08: 0000000000000000 R09: 0000000000040551
R10: ffff8880a24c0db0 R11: ffff8880a24c0500 R12: 0000000000000000
R13: ffff88809fa24f08 R14: ffffc9000b106000 R15: ffff88809fa24f00
FS:  0000555556753400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d212a4000 CR3: 000000007c6bc000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __vb2_buf_userptr_put drivers/media/v4l2-core/videobuf2-core.c:256 [inline]
 __vb2_free_mem drivers/media/v4l2-core/videobuf2-core.c:413 [inline]
 __vb2_queue_free+0x394/0x7a0 drivers/media/v4l2-core/videobuf2-core.c:454
 vb2_core_queue_release+0x5b/0x70 drivers/media/v4l2-core/videobuf2-core.c:2054
 v4l2_m2m_ctx_release+0x26/0x30 drivers/media/v4l2-core/v4l2-mem2mem.c:674
 vim2m_release+0xd4/0x120 drivers/media/platform/vim2m.c:959
 v4l2_release+0xf4/0x190 drivers/media/v4l2-core/v4l2-dev.c:446
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f7892fd6c8b
RSP: 002b:00007ffd68e76350 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f7892fd6c8b
RDX: 0000000000000000 RSI: 0000001b2e021dcc RDI: 0000000000000003
RBP: 00007f7893138960 R08: 0000000000000000 R09: 00000000bb70ef6f
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000a59a8
R13: 00007ffd68e76450 R14: 00007f7893137030 R15: 0000000000000032
Code: 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 91 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d 7c 24 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 40 01 00 
RIP: vb2_vmalloc_put_userptr+0x6a/0x210 drivers/media/v4l2-core/videobuf2-vmalloc.c:136 RSP: ffff888096627cc8
---[ end trace 9409fb76b84e6a63 ]---
----------------
Code disassembly (best guess):
   0:	4c 89 ea             	mov    %r13,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 91 01 00 00    	jne    0x1a2
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df
  1b:	4c 8b 65 08          	mov    0x8(%rbp),%r12
  1f:	49 8d 7c 24 09       	lea    0x9(%r12),%rdi
  24:	48 89 fa             	mov    %rdi,%rdx
  27:	48 c1 ea 03          	shr    $0x3,%rdx
* 2b:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2f:	48 89 fa             	mov    %rdi,%rdx
  32:	83 e2 07             	and    $0x7,%edx
  35:	38 d0                	cmp    %dl,%al
  37:	7f 08                	jg     0x41
  39:	84 c0                	test   %al,%al
  3b:	0f                   	.byte 0xf
  3c:	85 40 01             	test   %eax,0x1(%rax)