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authorWei Yongjun <weiyongjun1@huawei.com>2022-11-07 18:20:10 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2022-11-12 19:30:23 +0300
commitfc92d9e3de0b2d30a3ccc08048a5fad533e4672b (patch)
tree7bfb5c8858ce63553155a37392dcb6fa54f9b716 /net/dns_resolver
parent58143c1ed5882c138a3cd2251a336fc8755f23d9 (diff)
downloadlinux-fc92d9e3de0b2d30a3ccc08048a5fad533e4672b.tar.xz
iio: health: afe4404: Fix oob read in afe4404_[read|write]_raw
KASAN report out-of-bounds read as follows: BUG: KASAN: global-out-of-bounds in afe4404_read_raw+0x2ce/0x380 Read of size 4 at addr ffffffffc00e4658 by task cat/278 Call Trace: afe4404_read_raw iio_read_channel_info dev_attr_show The buggy address belongs to the variable: afe4404_channel_leds+0x18/0xffffffffffffe9c0 This issue can be reproduce by singe command: $ cat /sys/bus/i2c/devices/0-0058/iio\:device0/in_intensity6_raw The array size of afe4404_channel_leds and afe4404_channel_offdacs are less than channels, so access with chan->address cause OOB read in afe4404_[read|write]_raw. Fix it by moving access before use them. Fixes: b36e8257641a ("iio: health/afe440x: Use regmap fields") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Andrew Davis <afd@ti.com> Link: https://lore.kernel.org/r/20221107152010.95937-1-weiyongjun@huaweicloud.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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