WARNING: CPU: 0 PID: 8920 at fs/overlayfs/dir.c:263 ovl_instantiate+0x293/0x2f0 fs/overlayfs/dir.c:263 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 8920 Comm: syz-executor.1 Not tainted 5.1.0-rc5-next-20190418 #28 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x72b kernel/panic.c:214 __warn.cold+0x20/0x46 kernel/panic.c:576 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972 RIP: 0010:ovl_instantiate+0x293/0x2f0 fs/overlayfs/dir.c:263 Code: 04 31 ff 89 c3 89 c6 e8 ab c7 18 ff 85 db 75 63 e8 22 c6 18 ff 4c 89 e7 45 31 e4 e8 b7 8c 60 ff e9 20 ff ff ff e8 0d c6 18 ff <0f> 0b 41 89 dc e9 11 ff ff ff e8 fe c5 18 ff 0f 0b eb 86 48 89 85 RSP: 0018:ffff8880a80cfa98 EFLAGS: 00010293 RAX: ffff88809e8ba440 RBX: ffffffffffffff8c RCX: ffffffff8257ff4d RDX: 0000000000000000 RSI: ffffffff82580083 RDI: 0000000000000007 RBP: ffff8880a80cfb70 R08: ffff88809e8ba440 R09: ffffed1015019f2c R10: ffffed1015019f2b R11: 0000000000000003 R12: ffff88808c5dc9a0 R13: ffff88808c5dc000 R14: 0000000000000000 R15: ffff8880a80cfb48 ovl_create_over_whiteout fs/overlayfs/dir.c:518 [inline] ovl_create_or_link+0xabb/0x1250 fs/overlayfs/dir.c:582 ovl_create_object+0x231/0x2c0 fs/overlayfs/dir.c:616 ovl_symlink+0x25/0x30 fs/overlayfs/dir.c:651 vfs_symlink fs/namei.c:4125 [inline] vfs_symlink+0x378/0x5d0 fs/namei.c:4111 do_symlinkat+0x22b/0x290 fs/namei.c:4152 __do_sys_symlink fs/namei.c:4171 [inline] __se_sys_symlink fs/namei.c:4169 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4169 do_syscall_64+0x103/0x670 arch/x86/entry/common.c:298 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe661789c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458c29 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000040 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe66178a6d4 R13: 00000000004c74d3 R14: 00000000004dd3a0 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..