Re: [PATCH v1] Bluetooth: btinel: Check ACPI handle for NULL before accessing

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This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>:

On Wed,  8 Mar 2023 13:28:37 +0530 you wrote:
> Older platforms and Virtual platforms which doesn't have support for
> bluetooth device in ACPI firmware will not have valid ACPI handle. Check
> for validity of handle before accessing.
> dmesg log from simics environment (virtual platform):
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
> IP: acpi_ns_walk_namespace+0x5c/0x278
> PGD 0 P4D 0
> Oops: 0000 [#1] SMP PTI
> Modules linked in: bnep intel_powerclamp coretemp kvm_intel kvm irqbypass intel_cstate input_leds joydev serio_raw mac_hid btusb(OE) btintel(OE) bluetooth(OE) lpc_ich compat(OE) ecdh_generic i7core_edac i5500_temp shpchp binfmt_misc sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid e1000e psmouse ahci pata_acpi libahci ptp pps_core floppy
> CPU: 0 PID: 35 Comm: kworker/u3:0 Tainted: G           OE    4.15.0-140-generic #144-Ubuntu
> Hardware name: Simics Simics, BIOS Simics 01/01/2011
> Workqueue: hci0 hci_power_on [bluetooth]
> RIP: 0010:acpi_ns_walk_namespace+0x5c/0x278
> RSP: 0000:ffffaa9c0049bba8 EFLAGS: 00010246
> RAX: 0000000000000001 RBX: 0000000000001001 RCX: 0000000000000010
> RDX: ffffffff92ea7e27 RSI: ffffffff92ea7e10 RDI: 00000000000000c8
> RBP: ffffaa9c0049bbf8 R08: 0000000000000000 R09: ffffffffc05b39d0
> R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
> R13: 0000000000000000 R14: ffffffffc05b39d0 R15: ffffaa9c0049bc70
> FS:  0000000000000000(0000) GS:ffff8be73fc00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000018 CR3: 0000000075f0e000 CR4: 00000000000006f0
> [...]

Here is the summary with links:
  - [v1] Bluetooth: btinel: Check ACPI handle for NULL before accessing

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