i2c: xgene-slimpro: Fix out-of-bounds bug in xgene_slimpro_i2c_xfer()

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The data->block[0] variable comes from user and is a number between
0-255. Without proper check, the variable may be very large to cause
an out-of-bounds when performing memcpy in slimpro_i2c_blkwr.

Fix this bug by checking the value of writelen.

Fixes: f6505fbabc ("i2c: add SLIMpro I2C device driver on APM X-Gene platform")
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

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Wei Chen 2023-03-14 16:54:21 +00:00 • committed by Wolfram Sang

parent d982635126

commit 92fbb6d129

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drivers/i2c/busses/i2c-xgene-slimpro.c

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