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: 40d, last: 25d

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

similar bugs (1):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	WARNING: locking bug in inet_dgram_connect			1	218d	214d	0/17	auto-closed as invalid on 2020/01/26 13:01

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 7534 at kernel/locking/lockdep.c:873 look_up_lock_class+0x207/0x280 kernel/locking/lockdep.c:863
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7534 Comm: syz-executor.0 Not tainted 5.7.0-rc2-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:look_up_lock_class+0x207/0x280 kernel/locking/lockdep.c:863
Code: 3d 91 8b 12 08 00 0f 85 35 ff ff ff 31 db 48 c7 c7 19 59 e5 88 48 c7 c6 c3 e9 e6 88 31 c0 e8 c0 17 ec ff 0f 0b e9 7b ff ff ff <0f> 0b e9 74 ff ff ff 48 c7 c1 30 6d 55 8b 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000268fa98 EFLAGS: 00010002
RAX: ffffffff8ab07460 RBX: ffffffff8ad69a68 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a83b40a0
RBP: ffff8880a83b40b8 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff12d772d R11: 0000000000000000 R12: 1ffff11015076814
R13: ffffffff89063e89 R14: ffff8880a83b40a0 R15: dffffc0000000000
 register_lock_class+0x97/0x10d0 kernel/locking/lockdep.c:1220
 __lock_acquire+0x102/0x2c30 kernel/locking/lockdep.c:4234
 lock_acquire+0x169/0x480 kernel/locking/lockdep.c:4934
 __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:358 [inline]
 lock_sock_nested+0x43/0x110 net/core/sock.c:2959
 lock_sock include/net/sock.h:1574 [inline]
 inet_autobind net/ipv4/af_inet.c:179 [inline]
 inet_dgram_connect+0x1a7/0x360 net/ipv4/af_inet.c:569
 __sys_connect_file net/socket.c:1859 [inline]
 __sys_connect+0x2da/0x360 net/socket.c:1876
 __do_sys_connect net/socket.c:1887 [inline]
 __se_sys_connect net/socket.c:1884 [inline]
 __x64_sys_connect+0x76/0x80 net/socket.c:1884
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c829
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f47444d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00000000004dabc0 RCX: 000000000045c829
RDX: 000000000000001c RSI: 0000000020000040 RDI: 0000000000000003
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000084 R14: 00000000004c31c2 R15: 00007f47444da6d4
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-smack-root	2020/04/23 09:03	upstream	c578ddb3	2e44d63e	.config	log	report	syz		andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/05/08 10:29	upstream	6e7f2eac	6c70a1c2	.config	log	report			andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com, yoshfuji@linux-ipv6.org