dongjiuzhu1 e2f1ccdefc drivers/misc/rwbuffer: fix rwbuffer overflow issue ...

issue:
in rwb_wrflush():
memmove(rwb->wrbuffer + padblocks * rwb->blocksize,
rwb->wrbuffer, rwb->wrnblocks * rwb->blocksize);

when the offest from rwb->wrblockstart to startblock plus rwb->wrnblocks is greater
than rwb->wralignblocks, it will be causing memory overflow since rwb->wrbuffer is
allocated rwb.wrmaxblock(rwb.wralignblocks) blocks.

fix:
Let us ensure that the wrblockstart in rwbuffer must be aligned according to
wralignblocks after writing, so there is no need to perform memmove when flushing

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>

2024-04-23 10:28:52 +08:00

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1wire

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analog

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audio

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can

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lcd

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leds

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math

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misc

drivers/misc/rwbuffer: fix rwbuffer overflow issue

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modem

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power

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Kconfig

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Makefile

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