CVE-2023-53640

In the Linux kernel, the following vulnerability has been resolved:

ASoC: lpass: Fix for KASAN use_after_free out of bounds

When we run syzkaller we get below Out of Bounds error.

"KASAN: slab-out-of-bounds Read in regcache_flat_read"

Below is the backtrace of the issue:

BUG: KASAN: slab-out-of-bounds in regcache_flat_read+0x10c/0x110

Read of size 4 at addr ffffff8088fbf714 by task syz-executor.4/14144

CPU: 6 PID: 14144 Comm: syz-executor.4 Tainted: G W

Hardware name: Qualcomm Technologies, Inc. sc7280 CRD platform (rev5+) (DT)

Call trace:

dump_backtrace+0x0/0x4ec

show_stack+0x34/0x50

dump_stack_lvl+0xdc/0x11c

print_address_description+0x30/0x2d8

kasan_report+0x178/0x1e4

__asan_report_load4_noabort+0x44/0x50

regcache_flat_read+0x10c/0x110

regcache_read+0xf8/0x5a0

_regmap_read+0x45c/0x86c

_regmap_update_bits+0x128/0x290

regmap_update_bits_base+0xc0/0x15c

snd_soc_component_update_bits+0xa8/0x22c

snd_soc_component_write_field+0x68/0xd4

tx_macro_put_dec_enum+0x1d0/0x268

snd_ctl_elem_write+0x288/0x474

By Error checking and checking valid values issue gets rectifies.