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Commit 690b2549 authored by Dan Carpenter's avatar Dan Carpenter Committed by Linus Torvalds
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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: 5e9a97b1 ("i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALL")
Reported-and-tested-by: default avatarZheyu Ma <zheyuma97@gmail.com>
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d1dc8776
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