[PATCH] i2c: busses: Fix out-of-bounds bug in mchp_corei2c_smbus_xfer

Wolfram Sang wsa+renesas at sang-engineering.com
Sat Jun 28 13:09:48 PDT 2025


On Sun, Jun 15, 2025 at 07:49:19PM -0400, Alex Guo wrote:
> The data->block[0] variable comes from user. Without proper check,
> the variable may be very large to cause an out-of-bounds bug.

Okay, okay, instead of adding these limits to all these drivers, let me
start adding SMBus3 support to the kernel which allows for bigger block
sizes. I probably won't have time to export this to user space yet, but
let's at least make sure the kernel, and thus the drivers, won't suffer
from buffer overflows anymore.




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