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: 553d, last: 171d

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	731d	727d	0/22	auto-closed as invalid on 2020/01/26 13:01

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 28136 at kernel/locking/lockdep.c:896 look_up_lock_class kernel/locking/lockdep.c:895 [inline]
WARNING: CPU: 1 PID: 28136 at kernel/locking/lockdep.c:896 register_lock_class+0x276/0x1490 kernel/locking/lockdep.c:1244
Modules linked in:
CPU: 1 PID: 28136 Comm: syz-executor.0 Not tainted 5.12.0-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:895 [inline]
RIP: 0010:register_lock_class+0x276/0x1490 kernel/locking/lockdep.c:1244
Code: 30 43 80 3c 2e 00 44 8b 7c 24 0c 48 8b 5c 24 10 74 08 48 89 df e8 5a ff 65 00 48 c7 c0 60 a9 a0 8f 48 39 03 0f 84 13 0a 00 00 <0f> 0b e9 0c 0a 00 00 44 8b 7c 24 0c e9 fd 09 00 00 4d 89 e7 e8 51
RSP: 0018:ffffc9000aaef6a0 EFLAGS: 00010006
RAX: ffffffff8fa0a960 RBX: ffff88802333f4e0 RCX: 61c8864680b583eb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000aaef740
RBP: ffffc9000aaef7d0 R08: dffffc0000000000 R09: 0000000000000000
R10: fffffbfff1c70256 R11: 0000000000000000 R12: ffffffff9003c8c0
R13: dffffc0000000000 R14: 1ffff11004667e9c R15: 0000000000000000
FS:  00007fba27a41700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba27a41718 CR3: 0000000018b5a000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __lock_acquire+0x186/0x6040 kernel/locking/lockdep.c:4781
 lock_acquire+0x17f/0x720 kernel/locking/lockdep.c:5512
 __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+0x48/0x110 net/core/sock.c:3057
 lock_sock include/net/sock.h:1610 [inline]
 inet_autobind net/ipv4/af_inet.c:180 [inline]
 inet_dgram_connect+0x13b/0x370 net/ipv4/af_inet.c:578
 __sys_connect_file net/socket.c:1837 [inline]
 __sys_connect+0x39b/0x420 net/socket.c:1854
 __do_sys_connect net/socket.c:1864 [inline]
 __se_sys_connect net/socket.c:1861 [inline]
 __x64_sys_connect+0x76/0x80 net/socket.c:1861
 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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:00007fba27a41188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 00000000004665f9
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007fff60d3783f R14: 00007fba27a41300 R15: 0000000000022000

Crashes (5):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/05/09 21:54	upstream	b741596468b0	bc5434be	.config	log	report	syz		WARNING: locking bug in inet_dgram_connect
ci-upstream-kasan-gce-smack-root	2021/02/14 02:30	upstream	ac30d8ce28d6	98682e5e	.config	log	report	syz		WARNING: locking bug in inet_dgram_connect
ci-upstream-kasan-gce-smack-root	2020/04/23 09:03	upstream	c578ddb39e56	2e44d63e	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2020/10/03 23:44	upstream	22fbc037cd32	1a3f9408	.config	log	report		info
ci-upstream-kasan-gce-smack-root	2020/05/08 10:29	upstream	6e7f2eacf098	6c70a1c2	.config	log	report