general protection fault, probably for non-canonical address 0xdffffc0000000026: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137] CPU: 1 PID: 4276 Comm: kworker/u5:3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: hci4 hci_rx_work RIP: 0010:__lock_acquire+0xe8/0x7c50 kernel/locking/lockdep.c:4919 Code: 42 0f b6 04 00 84 c0 0f 85 53 65 00 00 83 3d b2 3a 9c 0c 00 0f 84 c0 27 00 00 83 3d c1 85 1c 0b 00 74 29 48 89 d8 48 c1 e8 03 <42> 80 3c 00 00 74 12 48 89 df e8 c9 08 6e 00 49 b8 00 00 00 00 00 RSP: 0018:ffffc90003e571c0 EFLAGS: 00010002 RAX: 0000000000000026 RBX: 0000000000000130 RCX: 1ffff920007cae5c RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000130 RBP: ffffc90003e57410 R08: dffffc0000000000 R09: 0000000000000000 R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: ffff8880270d1dc0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000001f000 CR3: 000000001e3c5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 lock_sock_nested+0x44/0x100 net/core/sock.c:3496 lock_sock include/net/sock.h:1792 [inline] l2cap_sock_ready_cb+0x41/0x120 net/bluetooth/l2cap_sock.c:1697 l2cap_chan_ready net/bluetooth/l2cap_core.c:1411 [inline] l2cap_le_start+0xa35/0x12b0 net/bluetooth/l2cap_core.c:1523 l2cap_conn_ready net/bluetooth/l2cap_core.c:1793 [inline] l2cap_connect_cfm+0x6d7/0x10d0 net/bluetooth/l2cap_core.c:8366 hci_connect_cfm+0x8f/0x130 include/net/bluetooth/hci_core.h:1814 le_conn_complete_evt+0x1079/0x15d0 net/bluetooth/hci_event.c:5882 hci_le_conn_complete_evt+0x183/0x440 net/bluetooth/hci_event.c:5908 hci_event_func net/bluetooth/hci_event.c:7412 [inline] hci_event_packet+0x791/0x1210 net/bluetooth/hci_event.c:7467 hci_rx_work+0x3eb/0xd40 net/bluetooth/hci_core.c:4083 process_one_work+0x898/0x1160 kernel/workqueue.c:2292 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xe8/0x7c50 kernel/locking/lockdep.c:4919 Code: 42 0f b6 04 00 84 c0 0f 85 53 65 00 00 83 3d b2 3a 9c 0c 00 0f 84 c0 27 00 00 83 3d c1 85 1c 0b 00 74 29 48 89 d8 48 c1 e8 03 <42> 80 3c 00 00 74 12 48 89 df e8 c9 08 6e 00 49 b8 00 00 00 00 00 RSP: 0018:ffffc90003e571c0 EFLAGS: 00010002 RAX: 0000000000000026 RBX: 0000000000000130 RCX: 1ffff920007cae5c RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000130 RBP: ffffc90003e57410 R08: dffffc0000000000 R09: 0000000000000000 R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: ffff8880270d1dc0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000001f000 CR3: 000000001e3c5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 42 0f b6 04 00 movzbl (%rax,%r8,1),%eax 5: 84 c0 test %al,%al 7: 0f 85 53 65 00 00 jne 0x6560 d: 83 3d b2 3a 9c 0c 00 cmpl $0x0,0xc9c3ab2(%rip) # 0xc9c3ac6 14: 0f 84 c0 27 00 00 je 0x27da 1a: 83 3d c1 85 1c 0b 00 cmpl $0x0,0xb1c85c1(%rip) # 0xb1c85e2 21: 74 29 je 0x4c 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 00 00 cmpb $0x0,(%rax,%r8,1) <-- trapping instruction 2f: 74 12 je 0x43 31: 48 89 df mov %rbx,%rdi 34: e8 c9 08 6e 00 call 0x6e0902 39: 49 rex.WB 3a: b8 00 00 00 00 mov $0x0,%eax