bisecting fixing commit since f6d5cb9e2c06f7d583dd9f4f7cca21d13d78c32a
building syzkaller on 816e0689d7d9d8321f8bf360740f0e516aee15ca
testing commit f6d5cb9e2c06f7d583dd9f4f7cca21d13d78c32a with gcc (GCC) 8.1.0
kernel signature: 96c82ca58fd544437ccfe81984f5c0ac0684441b5a72db3c140f1b3ef1d91fd2
all runs: crashed: general protection fault in hci_phy_link_complete_evt
testing current HEAD 10ad6cfd57360760116cde00a8ef756e121367a9
testing commit 10ad6cfd57360760116cde00a8ef756e121367a9 with gcc (GCC) 8.1.0
kernel signature: 15ba5bffc12916178c76878595ef8029be9b4c992162861e77cdeaecf4368b0d
all runs: crashed: general protection fault in hci_phy_link_complete_evt
revisions tested: 2, total time: 25m45.733216898s (build: 19m13.758467774s, test: 5m51.700738406s)
the crash still happens on HEAD
commit msg: Linux 4.19.148
crash: general protection fault in hci_phy_link_complete_evt
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
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: 1 PID: 6616 Comm: kworker/u5:1 Not tainted 4.19.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci2 hci_rx_work
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4692
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:ffff88808727fa58 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880859e2d40 RCX: 1ffff11010b2d927
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff88808727fa98 R08: 0000000000000000 R09: ffffed1015d6473a
R10: ffffed1015d6473a R11: ffff8880aeb239d3 R12: 0000000000000000
R13: ffff88808ba6da4b R14: ffff888085e86d40 R15: 00000000000000c9
FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001590004 CR3: 00000000a8d78000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hci_event_packet+0x214a/0x7174 net/bluetooth/hci_event.c:5917
 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:
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
---[ end trace b18ebba8922c26cc ]---
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RIP: 0010:hci_phy_link_complete_evt.isra.126+0x260/0x650 net/bluetooth/hci_event.c:4692
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
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
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RSP: 0018:ffff88808727fa58 EFLAGS: 00010202
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
RAX: dffffc0000000000 RBX: ffff8880859e2d40 RCX: 1ffff11010b2d927
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
RBP: ffff88808727fa98 R08: 0000000000000000 R09: ffffed1015d6473a
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
R10: ffffed1015d6473a R11: ffff8880aeb239d3 R12: 0000000000000000
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
R13: ffff88808ba6da4b R14: ffff888085e86d40 R15: 00000000000000c9
batman_adv: batadv0: Interface activated: batadv_slave_1
FS:  0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd4354e4000 CR3: 0000000093c1d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400