BUG: pagefault on kernel address 0xffffc9000efe5000 in non-whitelisted uaccess kobject: 'ip6_vti0' (000000003ce0d4aa): calling ktype release BUG: unable to handle kernel paging request at ffffc9000efe5000 device nr0 entered promiscuous mode PGD 1da948067 P4D 1da948067 PUD 1da949067 PMD 1d214e067 PTE 0 kobject: 'ip6_vti0': free name Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 23205 Comm: syz-executor3 Not tainted 4.19.0+ #313 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 kobject: 'loop4' (0000000033c61cb9): kobject_uevent_env Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880194bc7688 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 00000000000fd200 RCX: 00000000000f5200 RDX: 00000000000fd200 RSI: ffffc9000efe5000 RDI: 00000000200080c0 RBP: ffff880194bc76c0 R08: 0000000000000000 R09: 0000000000003f48 kobject: 'loop4' (0000000033c61cb9): fill_kobj_path: path = '/devices/virtual/block/loop4' R10: fffff52001e1b43f R11: ffffc9000f0da1ff R12: 00000000200fd2c0 R13: 00000000200000c0 R14: ffffc9000efdd000 R15: 00007ffffffff000 FS: 00007fb9545c0700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000efe5000 CR3: 00000001b7ae7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_to_user include/linux/uaccess.h:155 [inline] vidioc_g_fmt_vid_overlay+0x392/0x550 drivers/media/platform/vivid/vivid-vid-cap.c:1074 v4l_g_fmt+0x2ad/0x640 drivers/media/v4l2-core/v4l2-ioctl.c:1487 __video_do_ioctl+0x519/0xf00 drivers/media/v4l2-core/v4l2-ioctl.c:2833 video_usercopy+0x5c1/0x1760 drivers/media/v4l2-core/v4l2-ioctl.c:3013 video_ioctl2+0x2c/0x33 drivers/media/v4l2-core/v4l2-ioctl.c:3057 v4l2_ioctl+0x154/0x1b0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 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:00007fb9545bfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 00000000200000c0 RSI: 00000000c0d05604 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb9545c06d4 R13: 00000000004c1acf R14: 00000000004d29c8 R15: 00000000ffffffff Modules linked in: CR2: ffffc9000efe5000 ---[ end trace a02231e0facef4c4 ]--- RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880194bc7688 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 00000000000fd200 RCX: 00000000000f5200 RDX: 00000000000fd200 RSI: ffffc9000efe5000 RDI: 00000000200080c0 RBP: ffff880194bc76c0 R08: 0000000000000000 R09: 0000000000003f48 R10: fffff52001e1b43f R11: ffffc9000f0da1ff R12: 00000000200fd2c0 R13: 00000000200000c0 R14: ffffc9000efdd000 R15: 00007ffffffff000 FS: 00007fb9545c0700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000efe5000 CR3: 00000001b7ae7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400