CVE-2023-54245

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ASoC: codecs: tx-macro: Fix for KASAN: slab-out-of-bounds<br /> <br /> When we run syzkaller we get below Out of Bound.<br /> "KASAN: slab-out-of-bounds Read in regcache_flat_read"<br /> <br /> Below is the backtrace of the issue:<br /> <br /> dump_backtrace+0x0/0x4c8<br /> show_stack+0x34/0x44<br /> dump_stack_lvl+0xd8/0x118<br /> print_address_description+0x30/0x2d8<br /> kasan_report+0x158/0x198<br /> __asan_report_load4_noabort+0x44/0x50<br /> regcache_flat_read+0x10c/0x110<br /> regcache_read+0xf4/0x180<br /> _regmap_read+0xc4/0x278<br /> _regmap_update_bits+0x130/0x290<br /> regmap_update_bits_base+0xc0/0x15c<br /> snd_soc_component_update_bits+0xa8/0x22c<br /> snd_soc_component_write_field+0x68/0xd4<br /> tx_macro_digital_mute+0xec/0x140<br /> <br /> Actually There is no need to have decimator with 32 bits.<br /> By limiting the variable with short type u8 issue is resolved.