WARNING: locking bug in inet_dgram

WARNING: locking bug in inet_dgram_connect (2)
Status: upstream: reported syz repro on 2020/04/27 09:08
Reported-by: syzbot+02446910ced9f8b60c06@syzkaller.appspotmail.com
First crash: 312d, last: 16d

Cause bisection: the cause commit could be any of (bisect log):
  9211bfbff80a netfilter: add missing IS_ENABLED(CONFIG_BRIDGE_NETFILTER) checks to header-file.
  47e640af2e49 netfilter: add missing IS_ENABLED(CONFIG_NF_TABLES) check to header-file.
  a1b2f04ea527 netfilter: add missing includes to a number of header-files.
  0abc8bf4f284 netfilter: add missing IS_ENABLED(CONFIG_NF_CONNTRACK) checks to some header-files.
  bd96b4c75675 netfilter: inline four headers files into another one.
  43dd16efc7f2 netfilter: nf_tables: store data in offload context registers
  78458e3e08cd netfilter: add missing IS_ENABLED(CONFIG_NETFILTER) checks to some header-files.
  20a9379d9a03 netfilter: remove "#ifdef __KERNEL__" guards from some headers.
  bd8699e9e292 netfilter: nft_bitwise: add offload support
  2a475c409fe8 kbuild: remove all netfilter headers from header-test blacklist.
  7e59b3fea2a2 netfilter: remove unnecessary spaces
  1b90af292e71 ipvs: Improve robustness to the ipvs sysctl
  5785cf15fd74 netfilter: nf_tables: add missing prototypes.
  0a30ba509fde netfilter: nf_nat_proto: make tables static
  e84fb4b3666d netfilter: conntrack: use shared sysctl constants
  105333435b4f netfilter: connlabels: prefer static lock initialiser
  8c0bb7873815 netfilter: synproxy: rename mss synproxy_options field
  c162610c7db2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

Fix bisection: failed (bisect log)

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING: locking bug in inet_dgram_connect				1	490d	486d	0/21	auto-closed as invalid on 2020/01/26 13:01

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 9734 at kernel/locking/lockdep.c:895 look_up_lock_class kernel/locking/lockdep.c:894 [inline]
WARNING: CPU: 0 PID: 9734 at kernel/locking/lockdep.c:895 register_lock_class+0x1fc/0x12b0 kernel/locking/lockdep.c:1242
Modules linked in:
CPU: 0 PID: 9734 Comm: syz-executor.0 Not tainted 5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:894 [inline]
RIP: 0010:register_lock_class+0x1fc/0x12b0 kernel/locking/lockdep.c:1242
Code: 00 4c 3b 33 74 2b 43 80 3c 2c 00 74 08 4c 89 ff e8 59 f6 5f 00 48 c7 c0 60 48 3b 8f 49 39 07 44 8b 64 24 04 0f 84 52 09 00 00 <0f> 0b e9 4b 09 00 00 44 8b 64 24 04 e9 41 09 00 00 e8 de 5a ed 07
RSP: 0018:ffffc9000993fab0 EFLAGS: 00010002
RAX: ffffffff8f3b4860 RBX: ffff888017ea17f8 RCX: ffffffff8ff5ca03
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888017ea17e0
RBP: ffffffff8f72d5c0 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1b6727e R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8acc9b40 R15: ffff888017ea17e0
FS:  00007fb9f3026700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b7fb0e5550 CR3: 00000000122a1000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __lock_acquire+0x107/0x5e90 kernel/locking/lockdep.c:4711
 lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5442
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 lock_sock_nested+0x43/0x110 net/core/sock.c:3049
 lock_sock include/net/sock.h:1594 [inline]
 inet_autobind net/ipv4/af_inet.c:180 [inline]
 inet_dgram_connect+0x131/0x360 net/ipv4/af_inet.c:575
 __sys_connect_file net/socket.c:1835 [inline]
 __sys_connect+0x2da/0x360 net/socket.c:1852
 __do_sys_connect net/socket.c:1862 [inline]
 __se_sys_connect net/socket.c:1859 [inline]
 __x64_sys_connect+0x76/0x80 net/socket.c:1859
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x465d99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb9f3026188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465d99
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00000000004bcf27 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007fff78b1416f R14: 00007fb9f3026300 R15: 0000000000022000

Crashes (4):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/02/14 02:30	upstream	ac30d8ce	98682e5e	.config	log	report	syz		WARNING: locking bug in inet_dgram_connect
ci-upstream-kasan-gce-smack-root	2020/04/23 09:03	upstream	c578ddb3	2e44d63e	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2020/10/03 23:44	upstream	22fbc037	1a3f9408	.config	log	report		info
ci-upstream-kasan-gce-smack-root	2020/05/08 10:29	upstream	6e7f2eac	6c70a1c2	.config	log	report