bisecting fixing commit since a1b977b49b66c75e6c51a515f6700371ae720217
building syzkaller on fc7735a27949755327024847e12dcc1b868bcb99
testing commit a1b977b49b66c75e6c51a515f6700371ae720217 with gcc (GCC) 8.1.0
kernel signature: 4239ae213a77d32dcd3cda2097fa6c01346627ac459d53d41b76a6634a009d7b
all runs: crashed: general protection fault in hci_phy_link_complete_evt
testing current HEAD 13d2ce42de8cb98ff952f8de6307f896203854c2
testing commit 13d2ce42de8cb98ff952f8de6307f896203854c2 with gcc (GCC) 8.1.0
kernel signature: a92ab4c8a1f2f9c14f43f2a785ff9d44a133fe816c8b6a000018a51641465199
all runs: crashed: general protection fault in hci_phy_link_complete_evt
revisions tested: 2, total time: 27m13.04944421s (build: 20m52.154057211s, test: 5m32.169530406s)
the crash still happens on HEAD
commit msg: Linux 4.19.163
crash: general protection fault in hci_phy_link_complete_evt
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6029 Comm: kworker/u5:5 Not tainted 4.19.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci3 hci_rx_work
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4681
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:ffff8881e32f7a58 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881d1a320c0 RCX: 1ffff1103c8a3127
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff8881e32f7a98 R08: 0000000000000000 R09: ffffed103ece473a
R10: ffffed103ece473a R11: ffff8881f67239d3 R12: 0000000000000000
R13: ffff8881d82f254b R14: ffff8881e677d180 R15: 00000000000000c9
FS:  0000000000000000(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff54c40ff8 CR3: 000000000866d003 CR4: 00000000001606e0
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:
general protection fault: 0000 [#2] PREEMPT SMP KASAN
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
CPU: 0 PID: 6031 Comm: kworker/u5:7 Tainted: G      D           4.19.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci2 hci_rx_work
ieee80211 phy8: Selected rate control algorithm 'minstrel_ht'
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4681
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:ffff8881dc1bfa58 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881e335ecc0 RCX: 1ffff1103bac3137
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff8881dc1bfa98 R08: 0000000000000000 R09: ffffed103ece473a
R10: ffffed103ece473a R11: ffff8881f67239d3 R12: 0000000000000000
R13: ffff8881d52a1a0b R14: ffff8881d1e49140 R15: 00000000000000c9
FS:  0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000768000 CR3: 000000000866d003 CR4: 00000000001606f0
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
---[ end trace 8bec9c23e28748eb ]---
 hci_rx_work+0x31b/0x8e0 net/bluetooth/hci_core.c:4359
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4681
 process_one_work+0x7b9/0x15a0 kernel/workqueue.c:2155
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:ffff8881e32f7a58 EFLAGS: 00010202
 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:
RAX: dffffc0000000000 RBX: ffff8881d1a320c0 RCX: 1ffff1103c8a3127
---[ end trace 8bec9c23e28748ec ]---
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4681
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:ffff8881e32f7a58 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881d1a320c0 RCX: 1ffff1103c8a3127
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff8881e32f7a98 R08: 0000000000000000 R09: ffffed103ece473a
R10: ffffed103ece473a R11: ffff8881f67239d3 R12: 0000000000000000
R13: ffff8881d82f254b R14: ffff8881e677d180 R15: 00000000000000c9
FS:  0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560b6bb77688 CR3: 000000000866d003 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400