WARNING: CPU: 0 PID: 9805 at fs/overlayfs/dir.c:263 ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9805 Comm: syz-executor3 Not tainted 4.20.0-rc2+ #118 kobject: 'loop5' (0000000079357953): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop5' (0000000079357953): fill_kobj_path: path = '/devices/virtual/block/loop5' Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:ovl_instantiate+0x369/0x400 fs/overlayfs/dir.c:263 audit: type=1400 audit(1542529613.337:72): avc: denied { ioctl } for pid=9825 comm="syz-executor1" path="socket:[34388]" dev="sockfs" ino=34388 ioctlcmd=0x8933 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 Code: c3 89 c6 e8 f9 f4 ef fe 85 db 0f 85 9e 00 00 00 e8 dc f3 ef fe 4c 89 e7 45 31 f6 e8 c1 5f 46 ff e9 ec fe ff ff e8 c7 f3 ef fe <0f> 0b e9 e0 fe ff ff e8 bb f3 ef fe 0f 0b e9 63 ff ff ff e8 ef 40 RSP: 0018:ffff8881bfce79a0 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff8881bfce7a38 RCX: ffffc9000be92000 RDX: 0000000000019e8d RSI: ffffffff828f9419 RDI: 0000000000000007 RBP: ffff8881bfce7a60 R08: ffff8881a5ee2340 R09: ffffed1037f9cee7 R10: ffffed1037f9cee7 R11: 0000000000000003 R12: ffff8881bd5dbc60 R13: ffff8881bfce79d8 R14: ffffffffffffff8c R15: 0000000000000000 ovl_create_upper fs/overlayfs/dir.c:320 [inline] ovl_create_or_link+0x84b/0x1560 fs/overlayfs/dir.c:580 kobject: 'loop5' (0000000079357953): kobject_uevent_env kobject: 'loop5' (0000000079357953): fill_kobj_path: path = '/devices/virtual/block/loop5' ovl_create_object+0x2e9/0x3a0 fs/overlayfs/dir.c:616 ovl_mkdir+0x2b/0x30 fs/overlayfs/dir.c:635 vfs_mkdir+0x42e/0x6b0 fs/namei.c:3817 do_mkdirat+0x27a/0x310 fs/namei.c:3840 __do_sys_mkdir fs/namei.c:3856 [inline] __se_sys_mkdir fs/namei.c:3854 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3854 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 kobject: 'loop5' (0000000079357953): kobject_uevent_env RSP: 002b:00007f25eaba4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25eaba56d4 R13: 00000000004bcf22 R14: 00000000004d40b0 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..