From: Ammar Faizi <ammarfaizi2@xxxxxxxxxxx> commit b7fb0ae09009d076964afe4c1a2bde1ee2bd88a9 upstream. Do not call snd_dma_free_pages() when snd_dma_alloc_pages() returns -ENOMEM because it leads to a NULL pointer dereference bug. The dmesg says: [ T1387] sof-audio-pci-intel-tgl 0000:00:1f.3: error: memory alloc failed: -12 [ T1387] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ T1387] #PF: supervisor read access in kernel mode [ T1387] #PF: error_code(0x0000) - not-present page [ T1387] PGD 0 P4D 0 [ T1387] Oops: 0000 [#1] PREEMPT SMP NOPTI [ T1387] CPU: 6 PID: 1387 Comm: alsa-sink-HDA A Tainted: G W 5.17.0-rc4-superb-owl-00055-g80d47f5de5e3 [ T1387] Hardware name: HP HP Laptop 14s-dq2xxx/87FD, BIOS F.15 09/15/2021 [ T1387] RIP: 0010:dma_free_noncontiguous+0x37/0x80 [ T1387] Code: [... snip ...] [ T1387] RSP: 0000:ffffc90002b87770 EFLAGS: 00010246 [ T1387] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ T1387] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888101db30d0 [ T1387] RBP: 00000000fffffff4 R08: 0000000000000000 R09: 0000000000000000 [ T1387] R10: 0000000000000000 R11: ffffc90002b874d0 R12: 0000000000000001 [ T1387] R13: 0000000000058000 R14: ffff888105260c68 R15: ffff888105260828 [ T1387] FS: 00007f42e2ffd640(0000) GS:ffff888466b80000(0000) knlGS:0000000000000000 [ T1387] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ T1387] CR2: 0000000000000000 CR3: 000000014acf0003 CR4: 0000000000770ee0 [ T1387] PKRU: 55555554 [ T1387] Call Trace: [ T1387] <TASK> [ T1387] cl_stream_prepare+0x10a/0x120 [snd_sof_intel_hda_common 146addf995b9279ae7f509621078cccbe4f875e1] [... snip ...] [ T1387] </TASK> Cc: Daniel Baluta <daniel.baluta@xxxxxxx> Cc: Jaroslav Kysela <perex@xxxxxxxx> Cc: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx> Cc: Keyon Jie <yang.jie@xxxxxxxxxxxxxxx> Cc: Liam Girdwood <lgirdwood@xxxxxxxxx> Cc: Mark Brown <broonie@xxxxxxxxxx> Cc: Rander Wang <rander.wang@xxxxxxxxx> Cc: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx> Cc: Takashi Iwai <tiwai@xxxxxxxx> Cc: sound-open-firmware@xxxxxxxxxxxxxxxx Cc: alsa-devel@xxxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx # v5.2+ Fixes: d16046ffa6de040bf580a64d5f4d0aa18258a854 ("ASoC: SOF: Intel: Add Intel specific HDA firmware loader") Link: https://lore.kernel.org/lkml/20220224145124.15985-1-ammarfaizi2@xxxxxxxxxxx/ # v1 Link: https://lore.kernel.org/lkml/20220224180850.34592-1-ammarfaizi2@xxxxxxxxxxx/ # v2 Link: https://lore.kernel.org/lkml/20220224182818.40301-1-ammarfaizi2@xxxxxxxxxxx/ # v3 Reviewed-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Signed-off-by: Ammar Faizi <ammarfaizi2@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20220224185836.44907-1-ammarfaizi2@xxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> [ammarfaizi2: Backport to Linux 5.4 LTS] Signed-off-by: Ammar Faizi <ammarfaizi2@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- sound/soc/sof/intel/hda-loader.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/sound/soc/sof/intel/hda-loader.c +++ b/sound/soc/sof/intel/hda-loader.c @@ -50,7 +50,7 @@ static int cl_stream_prepare(struct snd_ ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, &pci->dev, size, dmab); if (ret < 0) { dev_err(sdev->dev, "error: memory alloc failed: %x\n", ret); - goto error; + goto out_put; } hstream->period_bytes = 0;/* initialize period_bytes */ @@ -60,16 +60,17 @@ static int cl_stream_prepare(struct snd_ ret = hda_dsp_stream_hw_params(sdev, dsp_stream, dmab, NULL); if (ret < 0) { dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret); - goto error; + goto out_free; } hda_dsp_stream_spib_config(sdev, dsp_stream, HDA_DSP_SPIB_ENABLE, size); return hstream->stream_tag; -error: - hda_dsp_stream_put(sdev, direction, hstream->stream_tag); +out_free: snd_dma_free_pages(dmab); +out_put: + hda_dsp_stream_put(sdev, direction, hstream->stream_tag); return ret; }