bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c
building syzkaller on 77a55c8ea6070a9a88715db4c17e9612a7f99b21
testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c with gcc (GCC) 8.1.0
kernel signature: 64e986e1e0a24cf1aaea46745c0bab42e72a214bb1d1eabf148b1d2e63fec2c6
all runs: crashed: BUG: corrupted list in kobject_add_internal
testing current HEAD ec822b3e8bf485ecb543773ad29289e6bb87b338
testing commit ec822b3e8bf485ecb543773ad29289e6bb87b338 with gcc (GCC) 8.1.0
kernel signature: 096b8d6a028f0eef53bc228018bc7503feddc6e0a9a023d302a45787357363c9
all runs: crashed: BUG: corrupted list in kobject_add_internal
revisions tested: 2, total time: 21m42.714596638s (build: 15m29.176369892s, test: 5m38.64502487s)
the crash still happens on HEAD
commit msg: Linux 4.14.214
crash: BUG: corrupted list in kobject_add_internal
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
list_add double add: new=ffff8881db5d6a38, prev=ffff8881db5d6a38, next=ffff8881f53c6e00.
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready
Modules linked in:
CPU: 0 PID: 7716 Comm: kworker/u5:3 Not tainted 4.14.214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci3 hci_rx_work
task: ffff8881dbd1e580 task.stack: ffff8881dc0c0000
RIP: 0010:__list_add_valid+0xaa/0xb0 lib/list_debug.c:29
RSP: 0018:ffff8881dc0c7820 EFLAGS: 00010282
RAX: 0000000000000058 RBX: ffff8881f53c6e00 RCX: 0000000000000000
RDX: 0000000000000058 RSI: ffffffff878b90a0 RDI: ffffed103b818efb
RBP: ffff8881dc0c7838 R08: ffff8881dbd1eea0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881db5d6a38
R13: ffff8881db5d6a48 R14: ffff8881f53c6e00 R15: ffff8881db5d6a30
FS:  0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a7204c2688 CR3: 0000000008e6a005 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 kobj_kset_join lib/kobject.c:171 [inline]
 kobject_add_internal+0x165/0x8d0 lib/kobject.c:220
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_add+0x109/0x160 lib/kobject.c:409
 device_add+0x344/0x1530 drivers/base/core.c:1869
 hci_conn_add_sysfs+0x8e/0x150 net/bluetooth/hci_sysfs.c:53
 hci_sync_conn_complete_evt.isra.101+0x8bc/0xa50 net/bluetooth/hci_event.c:3769
 hci_event_packet+0x1c10/0x6f13 net/bluetooth/hci_event.c:5388
 hci_rx_work+0x331/0xa50 net/bluetooth/hci_core.c:4244
 process_one_work+0x74f/0x1620 kernel/workqueue.c:2116
 worker_thread+0xcc/0xed0 kernel/workqueue.c:2250
 kthread+0x338/0x400 kernel/kthread.c:232
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 75 e8 eb a9 48 89 f7 48 89 75 e8 e8 61 42 5b fe 48 8b 75 e8 eb bb 48 89 f2 48 89 d9 4c 89 e6 48 c7 c7 80 6e cc 87 e8 b4 bb 20 fe <0f> 0b 0f 1f 40 00 48 b8 00 00 00 
ieee80211 phy7: mac80211_hwsim_configure_filter
00 00 fc ff df 55 48 89 e5 41 
RIP: __list_add_valid+0xaa/0xb0 lib/list_debug.c:29 RSP: ffff8881dc0c7820
---[ end trace ee457d6df58209ef ]---