WARNING in ovl

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in ovl_rename overlayfs	C	done	done	5	2034d	2030d	15/28	fixed on 2020/02/14 01:19
linux-4.14	WARNING in ovl_rename	syz		done	2	1801d	2034d	1/1	fixed on 2020/01/18 20:51

overlayfs: workdir and upperdir must reside under the same mount overlayfs: workdir and upperdir must reside under the same mount overlayfs: upper fs does not support tmpfile. overlayfs: workdir and upperdir must reside under the same mount overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off. WARNING: CPU: 0 PID: 13354 at fs/overlayfs/dir.c:1177 ovl_rename+0x14ef/0x1870 fs/overlayfs/dir.c:1177 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 13354 Comm: syz-executor.1 Not tainted 4.19.37 #5 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+0x263/0x51d kernel/panic.c:185 overlayfs: workdir and upperdir must reside under the same mount kobject: 'loop2' (00000000c0c181aa): kobject_uevent_env __warn.cold+0x20/0x54 kernel/panic.c:540 report_bug+0x263/0x2b0 lib/bug.c:186 kobject: 'loop2' (00000000c0c181aa): fill_kobj_path: path = '/devices/virtual/block/loop2' fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 overlayfs: workdir and upperdir must reside under the same mount do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:997 RIP: 0010:ovl_rename+0x14ef/0x1870 fs/overlayfs/dir.c:1177 Code: e0 04 89 c3 89 c6 e8 a0 39 1f ff 85 db be 01 00 00 00 0f 85 3e f7 ff ff e8 0e 38 1f ff 4c 89 f7 e9 16 f7 ff ff e8 01 38 1f ff <0f> 0b e9 05 f4 ff ff e8 f5 37 1f ff 48 8b 54 24 68 b8 ff ff 37 00 RSP: 0018:ffff8880799e7ac0 EFLAGS: 00010293 RAX: ffff888081b38000 RBX: 0000000000000000 RCX: ffff88808009a080 RDX: 0000000000000000 RSI: ffffffff824c0f7f RDI: ffff88808009a0d8 RBP: ffff8880799e7bf8 R08: ffff888081b38000 R09: 0000000000000007 R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 R13: ffff888094572040 R14: ffff888096351e00 R15: ffff8880799e7b90 vfs_rename+0x803/0x1a70 fs/namei.c:4476 do_renameat2+0xb0f/0xc40 fs/namei.c:4626 __do_sys_rename fs/namei.c:4672 [inline] __se_sys_rename fs/namei.c:4670 [inline] __x64_sys_rename+0x61/0x80 fs/namei.c:4670 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 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:00007efe73ca6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458da9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 00000000200000c0 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007efe73ca76d4 R13: 00000000004c5d4c R14: 00000000004da328 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..