syzbot
general protection fault in hci_inquiry_result_with_rssi_evt
Status:
fixed on 2022/05/19 12:02
Subsystems:
bluetooth
[Documentation on labels]
Reported-by: syzbot+e3cad3a4e3f03bc00562@syzkaller.appspotmail.com
Fix commit:
72279d17df54
Bluetooth: hci_event: Rework hci_inquiry_result_with_rssi_evt
First crash: 1688d, last: 1661d
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Last patch testing requests (1)
| Created |
Duration |
User |
Patch |
Repo |
Result |
| 2022/05/02 20:52 |
15m
|
phil@philpotter.co.uk
|
|
linux-next |
OK
|
Sample crash report:
Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6545 Comm: kworker/u5:1 Not tainted 5.16.0-rc4-next-20211208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
RIP: 0010:hci_inquiry_result_with_rssi_evt+0xbc/0x970 net/bluetooth/hci_event.c:4520
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 88 07 00 00 48 8b 04 24 4c 8b 28 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 1b 07 00 00
RSP: 0018:ffffc90001aafad0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88807e754000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff883588a8 RDI: ffff88807e754000
RBP: ffff88807e754000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88376f27 R11: 0000000000000000 R12: ffff88807015eb40
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd653f7000 CR3: 0000000071f88000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
hci_event_func net/bluetooth/hci_event.c:6812 [inline]
hci_event_packet+0x817/0xe90 net/bluetooth/hci_event.c:6860
hci_rx_work+0x4fa/0xd30 net/bluetooth/hci_core.c:3817
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2318
worker_thread+0x658/0x11f0 kernel/workqueue.c:2465
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Modules linked in:
---[ end trace 403a15c54e29c5c4 ]---
RIP: 0010:hci_inquiry_result_with_rssi_evt+0xbc/0x970 net/bluetooth/hci_event.c:4520
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 88 07 00 00 48 8b 04 24 4c 8b 28 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 1b 07 00 00
RSP: 0018:ffffc90001aafad0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88807e754000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff883588a8 RDI: ffff88807e754000
RBP: ffff88807e754000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88376f27 R11: 0000000000000000 R12: ffff88807015eb40
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2bb803f018 CR3: 000000001d893000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 88 07 00 00 jne 0x796
e: 48 8b 04 24 mov (%rsp),%rax
12: 4c 8b 28 mov (%rax),%r13
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 4c 89 ea mov %r13,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
* 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2a: 4c 89 ea mov %r13,%rdx
2d: 83 e2 07 and $0x7,%edx
30: 38 d0 cmp %dl,%al
32: 7f 08 jg 0x3c
34: 84 c0 test %al,%al
36: 0f 85 1b 07 00 00 jne 0x757
* Struck through repros no longer work on HEAD.