bisecting fixing commit since a1b977b49b66c75e6c51a515f6700371ae720217
building syzkaller on fc7735a27949755327024847e12dcc1b868bcb99
testing commit a1b977b49b66c75e6c51a515f6700371ae720217 with gcc (GCC) 8.1.0
kernel signature: b85721e2bdfc22a063e106e8bee108a3ed4066760a966c55ee491a4966519879
all runs: crashed: general protection fault in hci_phy_link_complete_evt
testing current HEAD 2c746135a12e3f329171ed168ca0078d468f6d85
testing commit 2c746135a12e3f329171ed168ca0078d468f6d85 with gcc (GCC) 8.1.0
kernel signature: b899e4b6465a9ba70d5b37fed2dfe0d4f2dd58148024982bebe88ef08f90f4df
all runs: crashed: general protection fault in hci_phy_link_complete_evt
revisions tested: 2, total time: 23m44.134745722s (build: 17m34.236864727s, test: 5m25.807049876s)
the crash still happens on HEAD
commit msg: Linux 4.19.158
crash: general protection fault in hci_phy_link_complete_evt
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6678 Comm: kworker/u5:8 Not tainted 4.19.158-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci5 hci_rx_work
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4681
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
Code: c1 ea 03 80 3c 02 00 0f 85 7c 03 00 00 4c 8b a3 28 08 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5f 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffff8880940b7a58 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880932d23c0 RCX: 1ffff11015afb557
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff8880940b7a98 R08: 0000000000000000 R09: ffffed101748473a
R10: ffffed101748473a R11: ffff8880ba4239d3 R12: 0000000000000000
R13: ffff88808dd4e34b R14: ffff88809454cf80 R15: 00000000000000c9
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kasan: CONFIG_KASAN_INLINE enabled
CR2: 0000000020000040 CR3: 000000009bed2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hci_event_packet+0x2b8e/0x7215 net/bluetooth/hci_event.c:5911
 hci_rx_work+0x31b/0x8e0 net/bluetooth/hci_core.c:4359
 process_one_work+0x7b9/0x15a0 kernel/workqueue.c:2155
 worker_thread+0x85/0xb60 kernel/workqueue.c:2298
 kthread+0x347/0x410 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
---[ end trace 0660b97cb82b1eae ]---
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4681
kasan: GPF could be caused by NULL-ptr deref or user memory access
Code: c1 ea 03 80 3c 02 00 0f 85 7c 03 00 00 4c 8b a3 28 08 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5f 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffff8880940b7a58 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880932d23c0 RCX: 1ffff11015afb557
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff8880940b7a98 R08: 0000000000000000 R09: ffffed101748473a
R10: ffffed101748473a R11: ffff8880ba4239d3 R12: 0000000000000000
R13: ffff88808dd4e34b R14: ffff88809454cf80 R15: 00000000000000c9
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056171b75ede8 CR3: 000000009bc0b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400