Oops: general protection fault, probably for non-canonical address 0xdffffc000000005e: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000002f0-0x00000000000002f7] CPU: 1 UID: 0 PID: 8226 Comm: syz.3.8730 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:611 [inline] RIP: 0010:__mutex_lock+0x14e/0x1550 kernel/locking/mutex.c:806 Code: e0 33 4c 9a 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 3e 12 00 00 83 3d b0 d9 91 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 d6 b1 76 f6 4d 39 64 24 58 0f 85 6a 11 00 RSP: 0000:ffffc9000df5f7c0 EFLAGS: 00010202 RAX: 000000000000005e RBX: 0000000000000000 RCX: ffffffff9a4c3303 RDX: 0000000000000000 RSI: ffffffff8e24f3ee RDI: 00000000000002f0 RBP: ffffc9000df5f980 R08: ffffc9000df5f8e7 R09: 0000000000000000 R10: ffffc9000df5f8c0 R11: fffff52001bebf1d R12: 0000000000000298 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001bebf10 FS: 00007fbb0e46a6c0(0000) GS:ffff888125313000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f94921344ac CR3: 0000000089a96000 CR4: 00000000003526f0 Call Trace: l2cap_unregister_user+0x36/0x170 net/bluetooth/l2cap_core.c:1740 hidp_connection_del+0xb0/0x170 net/bluetooth/hidp/core.c:1421 do_hidp_sock_ioctl net/bluetooth/hidp/sock.c:97 [inline] hidp_sock_ioctl+0x3ab/0x650 net/bluetooth/hidp/sock.c:128 sock_do_ioctl+0x101/0x320 net/socket.c:1313 sock_ioctl+0x5c6/0x7f0 net/socket.c:1434 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbb0d59cdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbb0e46a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbb0d816090 RCX: 00007fbb0d59cdd9 RDX: 0000200000000000 RSI: 00000000400448c9 RDI: 0000000000000007 RBP: 00007fbb0d632d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbb0d816128 R14: 00007fbb0d816090 R15: 00007ffe05d66418 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:611 [inline] RIP: 0010:__mutex_lock+0x14e/0x1550 kernel/locking/mutex.c:806 Code: e0 33 4c 9a 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 3e 12 00 00 83 3d b0 d9 91 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 d6 b1 76 f6 4d 39 64 24 58 0f 85 6a 11 00 RSP: 0000:ffffc9000df5f7c0 EFLAGS: 00010202 RAX: 000000000000005e RBX: 0000000000000000 RCX: ffffffff9a4c3303 RDX: 0000000000000000 RSI: ffffffff8e24f3ee RDI: 00000000000002f0 RBP: ffffc9000df5f980 R08: ffffc9000df5f8e7 R09: 0000000000000000 R10: ffffc9000df5f8c0 R11: fffff52001bebf1d R12: 0000000000000298 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001bebf10 FS: 00007fbb0e46a6c0(0000) GS:ffff888125213000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5b3544f0d1 CR3: 0000000089a96000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: e0 33 loopne 0x35 2: 4c 9a rex.WR (bad) 4: 48 c1 e8 03 shr $0x3,%rax 8: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax d: 84 c0 test %al,%al f: 0f 85 3e 12 00 00 jne 0x1253 15: 83 3d b0 d9 91 0e 00 cmpl $0x0,0xe91d9b0(%rip) # 0xe91d9cc 1c: 75 23 jne 0x41 1e: 49 8d 7c 24 58 lea 0x58(%r12),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 05 je 0x36 31: e8 d6 b1 76 f6 call 0xf676b20c 36: 4d 39 64 24 58 cmp %r12,0x58(%r12) 3b: 0f .byte 0xf 3c: 85 6a 11 test %ebp,0x11(%rdx)