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/openbmc/linux/drivers/i2c/busses/ |
H A D | i2c-ismt.c | 690b2549 Thu Jun 02 06:02:18 CDT 2022 Dan Carpenter <dan.carpenter@oracle.com> i2c: ismt: prevent memory corruption in ismt_access()
The "data->block[0]" variable comes from the user and is a number between 0-255. It needs to be capped to prevent writing beyond the end of dma_buffer[].
Fixes: 5e9a97b1f449 ("i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALL") Reported-and-tested-by: Zheyu Ma <zheyuma97@gmail.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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