Hello, syzbot found the following issue on: HEAD commit: 3674fbf0451d Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: net console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ab3f4f280000 kernel config: https://syzkaller.appspot.com/x/.config?x=c9bf1936936ca698 dashboard link: https://syzkaller.appspot.com/bug?extid=37acd5d80d00d609d233 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=1049b4e2a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=171aa228a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/42ed556782c3/disk-3674fbf0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1913e16e8565/vmlinux-3674fbf0.xz kernel image: https://storage.googleapis.com/syzbot-assets/469804b58a7c/bzImage-3674fbf0.xz The issue was bisected to: commit 06149746e7203d5ffe2d6faf9799ee36203aa8b8 Author: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx> Date: Tue Apr 11 23:02:22 2023 +0000 Bluetooth: hci_conn: Add support for linking multiple hcon bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=148e6b08a80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=168e6b08a80000 console output: https://syzkaller.appspot.com/x/log.txt?x=128e6b08a80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+37acd5d80d00d609d233@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 06149746e720 ("Bluetooth: hci_conn: Add support for linking multiple hcon") RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f09bc777879 RDX: 0000000000000008 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000800000015 R10: 0000000000000000 R11: 0000000000000246 R12: 0000555555a6d2b8 R13: 00007ffe17db6850 R14: 0000000000000072 R15: 00007ffe17db6860 </TASK> general protection fault, probably for non-canonical address 0xdffffc000000013b: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000009d8-0x00000000000009df] CPU: 1 PID: 5013 Comm: syz-executor238 Not tainted 6.4.0-rc7-syzkaller-01944-g3674fbf0451d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:sco_conn_add+0x2a/0x330 net/bluetooth/sco.c:127 Code: 41 57 41 56 41 55 49 89 fd 41 54 55 49 8d ad d8 09 00 00 53 e8 b7 f1 5a f8 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8b 02 00 00 4d 8b a5 d8 09 00 00 4d 85 e4 74 13 RSP: 0018:ffffc90003a8fd50 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888028830000 RCX: 0000000000000000 RDX: 000000000000013b RSI: ffffffff892957a9 RDI: 0000000000000000 RBP: 00000000000009d8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000010 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880203cf540 R15: ffff888028830010 FS: 0000555555a6d300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f09bc7db6e3 CR3: 0000000025e98000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sco_connect net/bluetooth/sco.c:274 [inline] sco_sock_connect+0x321/0xae0 net/bluetooth/sco.c:610 __sys_connect_file+0x153/0x1a0 net/socket.c:1991 __sys_connect+0x165/0x1a0 net/socket.c:2008 __do_sys_connect net/socket.c:2018 [inline] __se_sys_connect net/socket.c:2015 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:2015 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f09bc777879 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe17db67f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f09bc777879 RDX: 0000000000000008 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000800000015 R10: 0000000000000000 R11: 0000000000000246 R12: 0000555555a6d2b8 R13: 00007ffe17db6850 R14: 0000000000000072 R15: 00007ffe17db6860 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:sco_conn_add+0x2a/0x330 net/bluetooth/sco.c:127 Code: 41 57 41 56 41 55 49 89 fd 41 54 55 49 8d ad d8 09 00 00 53 e8 b7 f1 5a f8 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8b 02 00 00 4d 8b a5 d8 09 00 00 4d 85 e4 74 13 RSP: 0018:ffffc90003a8fd50 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888028830000 RCX: 0000000000000000 RDX: 000000000000013b RSI: ffffffff892957a9 RDI: 0000000000000000 RBP: 00000000000009d8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000010 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880203cf540 R15: ffff888028830010 FS: 0000555555a6d300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005653cab3d008 CR3: 0000000025e98000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 41 57 push %r15 2: 41 56 push %r14 4: 41 55 push %r13 6: 49 89 fd mov %rdi,%r13 9: 41 54 push %r12 b: 55 push %rbp c: 49 8d ad d8 09 00 00 lea 0x9d8(%r13),%rbp 13: 53 push %rbx 14: e8 b7 f1 5a f8 callq 0xf85af1d0 19: 48 89 ea mov %rbp,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 8b 02 00 00 jne 0x2bf 34: 4d 8b a5 d8 09 00 00 mov 0x9d8(%r13),%r12 3b: 4d 85 e4 test %r12,%r12 3e: 74 13 je 0x53 --- 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 If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
