mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-12-27 11:06:41 -05:00
Code Issues Packages Projects Releases Wiki Activity

ASoC: SOF: Fix function topology name check in profile info output

Browse Source 
The function topology feature, and the plat_data->machine field that
specifies this feature, is ACPI specific. The check didn't take this
into consideration, which causes a NULL pointer dereference splat on
OF platforms:

    BUG: KASAN: null-ptr-deref in sof_create_ipc_file_profile (sound/soc/sof/fw-file-profile.c:291 sound/soc/sof/fw-file-profile.c:340) snd_sof
    Read of size 8 at addr 00000000000000c8 by task (udev-worker)/247

    CPU: 7 UID: 0 PID: 247 Comm: (udev-worker) Not tainted 6.18.0-rc2-next-20251023-03804-g93b191bc0c26-dirty #747 PREEMPT  ba3c303a11d89508de4087cb5b4f8985b6d87b6f
    Hardware name: Google Ciri sku2 board (DT)
    Call trace:
    [KASAN stuff]
    sof_create_ipc_file_profile (sound/soc/sof/fw-file-profile.c:291 sound/soc/sof/fw-file-profile.c:340) snd_sof
    snd_sof_device_probe (sound/soc/sof/core.c:304 sound/soc/sof/core.c:388 sound/soc/sof/core.c:460 sound/soc/sof/core.c:719) snd_sof
    sof_of_probe (sound/soc/sof/sof-of-dev.c:84) snd_sof_of
     platform_probe (drivers/base/platform.c:1405)
    [...]

Check that the ACPI specific field is actually valid before accessing
it.

This was seen on a MediaTek based Chromebook.

Fixes: 2b92b98cc4 ("ASoC: SOF: Don't print the monolithic topology name if function topology may be used")
Cc: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://patch.msgid.link/20251023061226.1127345-1-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Chen-Yu Tsai
2025-10-23 14:12:24 +08:00
committed by Mark Brown
parent 638bae3fb2
commit edf5c89202
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
sound/soc/sof/fw-file-profile.c
View File

@@ -288,7 +288,8 @@ static void sof_print_profile_info(struct snd_sof_dev *sdev,
if (profile->fw_lib_path)
dev_info(dev, " Firmware lib path: %s\n", profile->fw_lib_path);
if (plat_data->machine->get_function_tplg_files && !plat_data->disable_function_topology)
if (plat_data->machine && plat_data->machine->get_function_tplg_files &&
!plat_data->disable_function_topology)
dev_info(dev, " Topology file: function topologies\n");
else
dev_info(dev, " Topology file: %s/%s\n",