CVE-2025-40317

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> regmap: slimbus: fix bus_context pointer in regmap init calls<br /> <br /> Commit 4e65bda8273c ("ASoC: wcd934x: fix error handling in<br /> wcd934x_codec_parse_data()") revealed the problem in the slimbus regmap.<br /> That commit breaks audio playback, for instance, on sdm845 Thundercomm<br /> Dragonboard 845c board:<br /> <br /> Unable to handle kernel paging request at virtual address ffff8000847cbad4<br /> ...<br /> CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT<br /> Hardware name: Thundercomm Dragonboard 845c (DT)<br /> ...<br /> Call trace:<br /> slim_xfer_msg+0x24/0x1ac [slimbus] (P)<br /> slim_read+0x48/0x74 [slimbus]<br /> regmap_slimbus_read+0x18/0x24 [regmap_slimbus]<br /> _regmap_raw_read+0xe8/0x174<br /> _regmap_bus_read+0x44/0x80<br /> _regmap_read+0x60/0xd8<br /> _regmap_update_bits+0xf4/0x140<br /> _regmap_select_page+0xa8/0x124<br /> _regmap_raw_write_impl+0x3b8/0x65c<br /> _regmap_bus_raw_write+0x60/0x80<br /> _regmap_write+0x58/0xc0<br /> regmap_write+0x4c/0x80<br /> wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x]<br /> snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core]<br /> __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core]<br /> dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core]<br /> dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core]<br /> snd_pcm_hw_params+0x124/0x464 [snd_pcm]<br /> snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm]<br /> snd_pcm_ioctl+0x34/0x4c [snd_pcm]<br /> __arm64_sys_ioctl+0xac/0x104<br /> invoke_syscall+0x48/0x104<br /> el0_svc_common.constprop.0+0x40/0xe0<br /> do_el0_svc+0x1c/0x28<br /> el0_svc+0x34/0xec<br /> el0t_64_sync_handler+0xa0/0xf0<br /> el0t_64_sync+0x198/0x19c<br /> <br /> The __devm_regmap_init_slimbus() started to be used instead of<br /> __regmap_init_slimbus() after the commit mentioned above and turns out<br /> the incorrect bus_context pointer (3rd argument) was used in<br /> __devm_regmap_init_slimbus(). It should be just "slimbus" (which is equal<br /> to &amp;slimbus-&gt;dev). Correct it. The wcd934x codec seems to be the only or<br /> the first user of devm_regmap_init_slimbus() but we should fix it till<br /> the point where __devm_regmap_init_slimbus() was introduced therefore<br /> two "Fixes" tags.<br /> <br /> While at this, also correct the same argument in __regmap_init_slimbus().