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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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1d58fb16a8
The SNDRV_RAWMIDI_STREAM_{OUTPUT,INPUT} ioctls may reallocate
runtime->buffer while other kernel threads are accessing it. If the
underlying krealloc() call frees the original buffer, then this can turn
into a use-after-free.
Most of these accesses happen while the thread is holding runtime->lock,
and can be fixed by just holding the same lock while replacing
runtime->buffer, however we can't hold this spinlock while
snd_rawmidi_kernel_{read1,write1} are copying to/from userspace. We
need to add and acquire a new mutex to prevent this from happening
concurrently with reallocation. We hold this mutex during the entire
reallocation process, to also prevent multiple concurrent reallocations
leading to a double-free.
Signed-off-by: Daniel Rosenberg <drosen@google.com>
bug: 64315347
Change-Id: I05764d4f1a38f373eb7c0ac1c98607ee5ff0eded
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| .. | ||
| ac97_codec.h | ||
| aci.h | ||
| ad1816a.h | ||
| ad1843.h | ||
| adau1373.h | ||
| adsp_err.h | ||
| aess.h | ||
| ak4xxx-adda.h | ||
| ak4113.h | ||
| ak4114.h | ||
| ak4117.h | ||
| ak4531_codec.h | ||
| ak4641.h | ||
| alc5623.h | ||
| apr_audio-v2.h | ||
| apr_audio.h | ||
| asequencer.h | ||
| asound.h | ||
| asoundef.h | ||
| atmel-abdac.h | ||
| atmel-ac97c.h | ||
| audio_cal_utils.h | ||
| audio_calibration.h | ||
| audio_slimslave.h | ||
| compress_driver.h | ||
| control.h | ||
| core.h | ||
| cpe_cmi.h | ||
| cpe_core.h | ||
| cs42l52.h | ||
| cs4231-regs.h | ||
| cs4271.h | ||
| cs8403.h | ||
| cs8427.h | ||
| da7213.h | ||
| da9055.h | ||
| designware_i2s.h | ||
| dmaengine_pcm.h | ||
| emu10k1.h | ||
| emu10k1_synth.h | ||
| emu8000.h | ||
| emu8000_reg.h | ||
| emux_legacy.h | ||
| emux_synth.h | ||
| es1688.h | ||
| gus.h | ||
| hda_hwdep.h | ||
| hwdep.h | ||
| i2c.h | ||
| info.h | ||
| initval.h | ||
| jack.h | ||
| l3.h | ||
| max9768.h | ||
| max98088.h | ||
| max98090.h | ||
| max98095.h | ||
| memalloc.h | ||
| minors.h | ||
| mixer_oss.h | ||
| mpu401.h | ||
| msm-audio-effects-q6-v2.h | ||
| msm-dai-q6-v2.h | ||
| msm-slim-dma.h | ||
| opl3.h | ||
| opl4.h | ||
| pcm-indirect.h | ||
| pcm.h | ||
| pcm_oss.h | ||
| pcm_params.h | ||
| pt2258.h | ||
| pxa2xx-lib.h | ||
| q6adm-v2.h | ||
| q6afe-v2.h | ||
| q6asm-v2.h | ||
| q6audio-v2.h | ||
| q6core.h | ||
| q6lsm.h | ||
| rawmidi.h | ||
| rt5659.h | ||
| s3c24xx_uda134x.h | ||
| sb.h | ||
| sb16_csp.h | ||
| seq_device.h | ||
| seq_kernel.h | ||
| seq_midi_emul.h | ||
| seq_midi_event.h | ||
| seq_oss.h | ||
| seq_oss_legacy.h | ||
| seq_virmidi.h | ||
| sh_dac_audio.h | ||
| sh_fsi.h | ||
| simple_card.h | ||
| snd_wavefront.h | ||
| soc-dai.h | ||
| soc-dapm.h | ||
| soc-dpcm.h | ||
| soc.h | ||
| soundfont.h | ||
| spear_dma.h | ||
| spear_spdif.h | ||
| sta32x.h | ||
| tas5086.h | ||
| tea575x-tuner.h | ||
| tea6330t.h | ||
| timer.h | ||
| tlv.h | ||
| tlv320aic3x.h | ||
| tlv320aic32x4.h | ||
| tlv320dac33-plat.h | ||
| tpa6130a2-plat.h | ||
| uda134x.h | ||
| uda1380.h | ||
| util_mem.h | ||
| voice_params.h | ||
| voice_svc.h | ||
| vx_core.h | ||
| wavefront.h | ||
| wm0010.h | ||
| wm1250-ev1.h | ||
| wm2000.h | ||
| wm2200.h | ||
| wm5100.h | ||
| wm8903.h | ||
| wm8904.h | ||
| wm8955.h | ||
| wm8960.h | ||
| wm8962.h | ||
| wm8993.h | ||
| wm8996.h | ||
| wm9081.h | ||
| wm9090.h | ||
| wss.h | ||