Hello, syzbot found the following issue on: HEAD commit: b5f217084ab3 Merge tag 'bpf-fixes' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=112e0820580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d99f0bff41614d0 dashboard link: https://syzkaller.appspot.com/bug?extid=f0e2ed7be2c4537cceb7 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-b5f21708.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4a2037d50b27/vmlinux-b5f21708.xz kernel image: https://storage.googleapis.com/syzbot-assets/e9e9c9c88191/bzImage-b5f21708.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f0e2ed7be2c4537cceb7@xxxxxxxxxxxxxxxxxxxxxxxxx Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000020: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xdead000000000100-0xdead000000000107] CPU: 1 UID: 0 PID: 7416 Comm: syz-executor Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:l2cap_conn_del+0x3dd/0x730 net/bluetooth/l2cap_core.c:1781 Code: 8b 40 20 48 89 df ff d0 0f 1f 00 4c 89 f7 e8 ca 2f fb 00 4d 8d b4 24 80 04 00 00 48 89 df e8 8a 42 ff ff 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 24 02 00 00 49 8b 84 24 80 04 00 00 4c 89 e3 RSP: 0018:ffffc9000371fad8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: ffff88804aaa6000 RCX: ffffffff8a2f4f3e RDX: ffff888020602440 RSI: ffffffff8a300c56 RDI: 0000000000000005 RBP: ffff8880341df800 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: deacfffffffffc80 R13: dffffc0000000000 R14: dead000000000100 R15: 0000000000000067 FS: 0000000000000000(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd90480a0 CR3: 000000000df7e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> l2cap_disconn_cfm net/bluetooth/l2cap_core.c:7299 [inline] l2cap_disconn_cfm+0x96/0xd0 net/bluetooth/l2cap_core.c:7292 hci_disconn_cfm include/net/bluetooth/hci_core.h:2050 [inline] hci_conn_hash_flush+0x10b/0x260 net/bluetooth/hci_conn.c:2698 hci_dev_close_sync+0x603/0x11a0 net/bluetooth/hci_sync.c:5212 hci_dev_do_close+0x2e/0x90 net/bluetooth/hci_core.c:483 hci_unregister_dev+0x213/0x620 net/bluetooth/hci_core.c:2698 vhci_release+0x79/0xf0 drivers/bluetooth/hci_vhci.c:664 __fput+0x3f8/0xb60 fs/file_table.c:450 task_work_run+0x14e/0x250 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xadd/0x2d70 kernel/exit.c:938 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1096 x64_sys_call+0x151f/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5ad877fed9 Code: Unable to access opcode bytes at 0x7f5ad877feaf. RSP: 002b:00007ffcd904a1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5ad877fed9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043 RBP: 00007f5ad87e0840 R08: 00007ffcd9047f57 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000003 R14: 00000000ffffffff R15: 00007ffcd904a360 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:l2cap_conn_del+0x3dd/0x730 net/bluetooth/l2cap_core.c:1781 Code: 8b 40 20 48 89 df ff d0 0f 1f 00 4c 89 f7 e8 ca 2f fb 00 4d 8d b4 24 80 04 00 00 48 89 df e8 8a 42 ff ff 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 24 02 00 00 49 8b 84 24 80 04 00 00 4c 89 e3 RSP: 0018:ffffc9000371fad8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: ffff88804aaa6000 RCX: ffffffff8a2f4f3e RDX: ffff888020602440 RSI: ffffffff8a300c56 RDI: 0000000000000005 RBP: ffff8880341df800 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: deacfffffffffc80 R13: dffffc0000000000 R14: dead000000000100 R15: 0000000000000067 FS: 0000000000000000(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb5df3d4fb8 CR3: 00000000506a0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8b 40 20 mov 0x20(%rax),%eax 3: 48 89 df mov %rbx,%rdi 6: ff d0 call *%rax 8: 0f 1f 00 nopl (%rax) b: 4c 89 f7 mov %r14,%rdi e: e8 ca 2f fb 00 call 0xfb2fdd 13: 4d 8d b4 24 80 04 00 lea 0x480(%r12),%r14 1a: 00 1b: 48 89 df mov %rbx,%rdi 1e: e8 8a 42 ff ff call 0xffff42ad 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 0f 85 24 02 00 00 jne 0x259 35: 49 8b 84 24 80 04 00 mov 0x480(%r12),%rax 3c: 00 3d: 4c 89 e3 mov %r12,%rbx --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
