Hello, syzbot found the following issue on: HEAD commit: 4eee8d0b64ec Add linux-next specific files for 20211208 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=130203e5b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=20b74d9da4ce1ef1 dashboard link: https://syzkaller.appspot.com/bug?extid=e3cad3a4e3f03bc00562 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101eb355b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15b8f805b00000 The issue was bisected to: commit 3e54c5890c87a30b1019a3de9dab968ff2b21e06 Author: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx> Date: Wed Dec 1 18:55:03 2021 +0000 Bluetooth: hci_event: Use of a function table to handle HCI events bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=150100bab00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=170100bab00000 console output: https://syzkaller.appspot.com/x/log.txt?x=130100bab00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e3cad3a4e3f03bc00562@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 3e54c5890c87 ("Bluetooth: hci_event: Use of a function table to handle HCI events") 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 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
