WARNING in cgroup_finalize

WARNING in cgroup_finalize_control
Status: upstream: reported syz repro on 2020/05/11 17:21
Reported-by: syzbot+9c08aaa363ca5784c9e9@syzkaller.appspotmail.com
First crash: 26d, last: 1d11h

Cause bisection: introduced by (bisect log):

commit eab59075d3cd7f3535aa2dbbc19a198dfee58892
Author: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Date: Wed Dec 28 11:26:31 2016 +0000

sctp: reduce indent level at sctp_sf_tabort_8_4_8

Crash: WARNING in nf_unregister_net_hook (log)
Repro: syz .config

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 7271 at kernel/cgroup/cgroup.c:3111 cgroup_apply_control_disable kernel/cgroup/cgroup.c:3111 [inline]
WARNING: CPU: 0 PID: 7271 at kernel/cgroup/cgroup.c:3111 cgroup_finalize_control+0xb6c/0xd60 kernel/cgroup/cgroup.c:3178
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7271 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0
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+0x1e9/0x30e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1ac/0x2d0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:cgroup_apply_control_disable kernel/cgroup/cgroup.c:3111 [inline]
RIP: 0010:cgroup_finalize_control+0xb6c/0xd60 kernel/cgroup/cgroup.c:3178
Code: 89 f7 ff d3 eb 08 e8 83 fd 07 00 0f 1f 00 49 ff c4 49 83 fc 0d 0f 84 63 01 00 00 e8 6e fd 07 00 e9 a9 f8 ff ff e8 64 fd 07 00 <0f> 0b e9 88 f9 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c cd f8 ff
RSP: 0018:ffffc90002dbfba8 EFLAGS: 00010293
RAX: ffffffff816b87ec RBX: 0000000000000002 RCX: ffff8880a2fdc2c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffffff89307278 R08: ffffffff816b816c R09: ffffed1015d07074
R10: ffffed1015d07074 R11: 0000000000000000 R12: 0000000000000008
R13: ffff8880a24b2000 R14: ffff8880a182f000 R15: dffffc0000000000
 rebind_subsystems+0x737/0xe60 kernel/cgroup/cgroup.c:1750
 cgroup_setup_root+0x679/0xd50 kernel/cgroup/cgroup.c:1984
 cgroup1_root_to_use kernel/cgroup/cgroup-v1.c:1190 [inline]
 cgroup1_get_tree+0x7a2/0xae0 kernel/cgroup/cgroup-v1.c:1207
 vfs_get_tree+0x88/0x270 fs/super.c:1547
 do_new_mount fs/namespace.c:2816 [inline]
 do_mount+0x17ec/0x2900 fs/namespace.c:3141
 __do_sys_mount fs/namespace.c:3350 [inline]
 __se_sys_mount+0xd3/0x100 fs/namespace.c:3327
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45f4ba
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 8c fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffcfec6fd98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcfec6fdf0 RCX: 000000000045f4ba
RDX: 00000000004cafd1 RSI: 00000000004c16a5 RDI: 00000000004c1668
RBP: 0000000000000000 R08: 00000000004cfa40 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004185d0
R13: 00007ffcfec70018 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (3):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	Maintainers
ci-upstream-kasan-gce-smack-root	2020/06/01 15:55	upstream	3d77e6a8	a0331e89	.config	log	report	syz	andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, cgroups@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, hannes@cmpxchg.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, linux-kernel@vger.kernel.org, lizefan@huawei.com, netdev@vger.kernel.org, songliubraving@fb.com, tj@kernel.org, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/05/23 00:56	upstream	051143e1	9682898d	.config	log	report	syz	andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, cgroups@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, hannes@cmpxchg.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, linux-kernel@vger.kernel.org, lizefan@huawei.com, netdev@vger.kernel.org, songliubraving@fb.com, tj@kernel.org, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/05/07 17:10	upstream	a811c1fa	98cbd87b	.config	log	report	syz	andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, cgroups@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, hannes@cmpxchg.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, linux-kernel@vger.kernel.org, lizefan@huawei.com, netdev@vger.kernel.org, songliubraving@fb.com, tj@kernel.org, yhs@fb.com