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: 20966 Comm: syz-executor.5 Not tainted 4.14.139 #35 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88804a7c0340 task.stack: ffff88804a7c8000 RIP: 0010:vb2_vmalloc_put_userptr+0x6e/0x210 drivers/media/v4l2-core/videobuf2-vmalloc.c:136 RSP: 0018:ffff88804a7cfc18 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffc90001961000 RCX: 1ffffffff0da7654 RDX: 0000000000000001 RSI: ffff888086e31294 RDI: 0000000000000009 RBP: ffff88804a7cfc40 R08: dffffc0000000000 R09: ffffffff88c99bd8 R10: ffff88804a7cfcd0 R11: ffff88804a7c0340 R12: ffff888081037e00 R13: 0000000000000000 R14: ffff888081037e00 R15: ffff888081037e08 FS: 0000000001d88940(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000021000000 CR3: 00000000979fc000 CR4: 00000000001406e0 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+0x3a8/0x7d0 drivers/media/v4l2-core/videobuf2-core.c:454 vb2_core_queue_release+0x64/0x80 drivers/media/v4l2-core/videobuf2-core.c:2043 vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline] _vb2_fop_release+0x1cf/0x2a0 drivers/media/v4l2-core/videobuf2-v4l2.c:840 vb2_fop_release+0x75/0xc0 drivers/media/v4l2-core/videobuf2-v4l2.c:854 vivid_fop_release+0x180/0x3f0 drivers/media/platform/vivid/vivid-core.c:486 v4l2_release+0xf9/0x190 drivers/media/v4l2-core/v4l2-dev.c:446 __fput+0x275/0x7a0 fs/file_table.c:210 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x114/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1da/0x220 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+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413511 RSP: 002b:00007ffc212d6fe0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413511 RDX: 0000001b32020000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000010745ce5 R09: 0000000010745ce9 R10: 00007ffc212d70c0 R11: 0000000000000293 R12: 000000000075bf20 R13: 00000000000635fe R14: 00000000007608e0 R15: ffffffffffffffff Code: 4c 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8d 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 08 49 8d 7d 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 3c 01 00 kobject: 'bcsf0' (ffff88809f43c6b0): kobject_add_internal: parent: 'net', set: 'devices' RIP: vb2_vmalloc_put_userptr+0x6e/0x210 drivers/media/v4l2-core/videobuf2-vmalloc.c:136 RSP: ffff88804a7cfc18 kobject: 'loop4' (ffff8880a4b1cb60): kobject_uevent_env kobject: 'loop4' (ffff8880a4b1cb60): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'kvm' (ffff8880a7274190): kobject_uevent_env kobject: 'kvm' (ffff8880a7274190): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (ffff8880a7274190): kobject_uevent_env kobject: 'kvm' (ffff8880a7274190): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (ffff8880a4a681e0): kobject_uevent_env kobject: 'loop2' (ffff8880a4a681e0): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (ffff8880a7274190): kobject_uevent_env kobject: 'kvm' (ffff8880a7274190): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (ffff8880a7274190): kobject_uevent_env kobject: 'kvm' (ffff8880a7274190): fill_kobj_path: path = '/devices/virtual/misc/kvm' ---[ end trace dd8b4724c64b0409 ]--- kobject: 'loop2' (ffff8880a4a681e0): kobject_uevent_env